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암모니아(가스)

암모니아(가스)
암모니아(가스) 구조식 이미지
카스 번호:
7664-41-7
한글명:
암모니아(가스)
동의어(한글):
암모니아;암모니아(가스);암모니아,무수
상품명:
Ammonia
동의어(영문):
NH3;r717;am-fol;amoniak;AMMONIA;ammoniac;ammoniak;ammonia00;ammoniaca;Nitro-Sil
CBNumber:
CB9854275
분자식:
H3N
포뮬러 무게:
17.03
MOL 파일:
7664-41-7.mol

암모니아(가스) 속성

녹는점
−78 °C(lit.)
끓는 점
60 °C
밀도
1.023 g/mL at 25 °C
증기 밀도
0.6 (vs air)
증기압
8.75 atm ( 21 °C)
FEMA
4494 | AMMONIA (ALSO INCLUDES AMMONIUM CHLORIDE)
인화점
52 °F
저장 조건
0-6°C
용해도
Miscible with ethanol (95%) and water.
산도 계수 (pKa)
38(at 25℃)
물리적 상태
Liquid
색상
Colorless
냄새
Intense pungent odor detectable at 17 ppm
폭발한계
25%
수용성
soluble
감도
Hygroscopic
Merck
14,492
BRN
3587154
Henry's Law Constant
1.31 at 0 °C, 2.92 at 20 °C (droplet train apparatus, Shi et al., 1999)
노출 한도
TLV-TWA 25 ppm (~18 mg/m3) (ACGIH and MSHA), 50 ppm (OSHA); STEL 35 ppm; IDLH 500 ppm (NIOSH).
안정성
Stable. Hygroscopic. Flammable. Incompatible with acids, strong oxidizing agents. May react violently with acids, aldehydes, alkylene oxides, amides, boron, boron halides, calcium, chlorine azide, chloric acid, chlorine monoxide, chlorites, halogens, heavy metals and many other materials - check the complete data sheet before use!
CAS 데이터베이스
7664-41-7(CAS DataBase Reference)
NIST
Ammonia(7664-41-7)
EPA
Ammonia(7664-41-7)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 F,N,T,Xn
위험 카페고리 넘버 11-20-36/37/38-67-39/23/24/25-23/24/25-10-50-34-23-36-66-40-36/37-19
안전지침서 26-7-45-36/37/39-16-9-61-36/37
유엔번호(UN No.) UN 1219 3/PG 2
WGK 독일 2
RTECS 번호 BO0875000
자연 발화 온도 690 °C
TSCA Yes
위험 등급 3
포장분류 II
HS 번호 28141000
유해 물질 데이터 7664-41-7(Hazardous Substances Data)
독성 LD50 oral (rat) 350 mg/kg
LC50 inhal (rat) 2000 ppm (4 h)
PEL (OSHA) 35 ppm (27 mg/m3)
TLV-TWA (ACGIH) 25 ppm (17 mg/m3)
STEL (ACGIH) 35 ppm (27 mg/m3)
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H221 인화성 가스 인화성 가스 구분 2 경고 P210, P377, P381, P403
H225 고인화성 액체 및 증기 인화성 액체 구분 2 위험 P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H280 고압가스; 가열시 폭발할 수 있음 고압가스 압축가스
액화가스
용존 가스
경고 P410+P403
H301 삼키면 유독함 급성 독성 물질 - 경구 구분 3 위험 P264, P270, P301+P310, P321, P330,P405, P501
H302 삼키면 유해함 급성 독성 물질 - 경구 구분 4 경고 P264, P270, P301+P312, P330, P501
H303 삼키면 유해할 수 있음 급성 독성 물질 - 경구 구분 5 P312
H311 피부와 접촉하면 유독함 급성 독성 물질 - 경피 구분 3 위험 P280, P302+P352, P312, P322, P361,P363, P405, P501
H314 피부에 심한 화상과 눈에 손상을 일으킴 피부부식성 또는 자극성물질 구분 1A, B, C 위험 P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H315 피부에 자극을 일으킴 피부부식성 또는 자극성물질 구분 2 경고 P264, P280, P302+P352, P321,P332+P313, P362
H318 눈에 심한 손상을 일으킴 심한 눈 손상 또는 자극성 물질 구분 1 위험 P280, P305+P351+P338, P310
H319 눈에 심한 자극을 일으킴 심한 눈 손상 또는 자극성 물질 구분 2A 경고 P264, P280, P305+P351+P338,P337+P313P
H331 흡입하면 유독함 급성 독성 물질 흡입 구분 3 위험 P261, P271, P304+P340, P311, P321,P403+P233, P405, P501
H334 흡입 시 알레르기성 반응, 천식 또는 호흡 곤란 등을 일으킬 수 있음 호흡기 과민성 물질 구분 1 위험 P261, P285, P304+P341, P342+P311,P501
H335 호흡 자극성을 일으킬 수 있음 특정 표적장기 독성 - 1회 노출;호흡기계 자극 구분 3 경고
H336 졸음 또는 현기증을 일으킬 수 있음 특정표적장기 독성 물질(1회 노출);마취작용 구분 3 경고 P261, P271, P304+P340, P312,P403+P233, P405, P501
H340 유전적인 결함을 일으킬 수 있음 (노출되어도 생식세포 유전독성을 일으키지 않는다는 결정적인 증거가 있는 노출경로가 있다면 노출경로 기재) 생식세포 변이원성 물질 구분 1A, 1B 위험
H341 유전적인 결함을 일으킬 것으로 의심됨 (노출되어도 생식세포 유전독성을 일으키지 않는다는 결정적인 증거가 있는 노출경로가 있다면 노출경로 기재) 생식세포 변이원성 물질 구분 2 경고 P201,P202, P281, P308+P313, P405,P501
H351 암을 일으킬 것으로 의심됨 (노출되어도 암을 일으키지 않는다는 결정적인 증거가 있는 노출경로가 있다면 노출경로 기재) 발암성 물질 구분 2 경고 P201, P202, P281, P308+P313, P405,P501
H360 태아 또는 생식능력에 손상을 일으킬 수 있음 생식독성 물질 구분 1A, 1B 위험
H361 태아 또는 생식능력에 손상을 일으킬 것으로 의심됨 생식독성 물질 구분 2 경고 P201, P202, P281, P308+P313, P405,P501
H370 장기(또는, 영향을 받은 알려진 모든 장기를 명시)에 손상을 일으킴(노출되어도 특정 표적장기 독성을 일으키지 않는다는 결정적인 노출경로가 있다면 노출경로를 기재) 특정 표적장기 독성 - 1회 노출 구분 1 위험 P260, P264, P270, P307+P311, P321,P405, P501
H372 장기간 또는 반복 노출되면 장기(또는, 영향을 받은 알려진 모든 장기를 명시)에 손상을 일으킴 특정 표적장기 독성 - 반복 노출 구분 1 위험 P260, P264, P270, P314, P501
H373 장기간 또는 반복 노출되면 장기(또는, 영향을 받은 알려진 모든 장기를 명시)에 손상을 일으킬 수 있음 특정 표적장기 독성 - 반복 노출 구분 2 경고 P260, P314, P501
H401 수생생물에 유독함 수생 환경유해성 물질 - 급성 구분 2 P273, P501
H410 장기적 영향에 의해 수생생물에 매우 유독함 수생 환경유해성 물질 - 만성 구분 1 경고 P273, P391, P501
H411 장기적 영향에 의해 수생생물에 유독함 수생 환경유해성 물질 - 만성 구분 2
H412 장기적 영향에 의해 수생생물에 유해함 수생 환경유해성 물질 - 만성 구분 3 P273, P501
예방조치문구:
P201 사용 전 취급 설명서를 확보하시오.
P202 모든 안전 조치 문구를 읽고 이해하기 전에는 취급하지 마시오.
P210 열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.
P233 용기를 단단히 밀폐하시오. 용기는 환기가 잘 되는 곳에 단단히 밀폐하여 보관하시오.
P240 용기와 수용설비를 접지 및 접합시키시오.
P260 분진·흄·가스·미스트·증기·...·스프레이를 흡입하지 마시오.
P261 분진·흄·가스·미스트·증기·...·스프레이의 흡입을 피하시오.
P264 취급 후에는 손을 철저히 씻으시오.
P264 취급 후에는 손을 철저히 씻으시오.
P270 이 제품을 사용할 때에는 먹거나, 마시거나 흡연하지 마시오.
P271 옥외 또는 환기가 잘 되는 곳에서만 취급하시오.
P273 환경으로 배출하지 마시오.
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P281 요구되는 개인 보호구를 착용하시오
P284 호흡 보호구를 착용하시오.
P310 즉시 의료기관(의사)의 진찰을 받으시오. 삼켰다면 즉시 의료기관(의사)의 도움을 받으시오.
P311 의료기관(의사)의 진찰을 받으시오.
P377 누출성 가스 화재 시 : 누출을 안전하게 막을 수 없다면, 불을 끄려하지 마시오.
P391 누출물을 모으시오.
P301+P310 삼켰다면 즉시 의료기관(의사)의 진찰을 받으시오.
P303+P361+P353 피부(또는 머리카락)에 묻으면 오염된 모든 의복은 벗거나 제거하시오 피부를 물로 씻으시오/샤워하시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.
P307+P311 노출된 경우,독성 물질 센터 또는 의사에게 전화하기
P370+P378 화재 시 불을 끄기 위해 (Section 5. 폭발, 화재시 대처방법의 적절한 소화제)을(를) 사용하시오.
P403 환기가 잘 되는 곳에 보관하시오.
P405 밀봉하여 저장하시오.
P403+P233 용기는 환기가 잘 되는 곳에 단단히 밀폐하여 저장하시오.
P403+P235 환기가 잘 되는 곳에 보관하고 저온으로 유지하시오.

암모니아(가스) MSDS


Ammonia

암모니아(가스) C화학적 특성, 용도, 생산

개요

Ammonia is a colorless, pungent-smelling gas that is one of the most important industrial inorganic chemicals. It is widely used in fertilizers, refrigerants, explosives, cleaning agents, and as a feedstock to produce numerous other chemicals. Ammonia ranks as one of the top 10 chemicals produced annually.

화학적 성질

Strong ammonia solution occurs as a clear, colorless liquid having an exceedingly pungent, characteristic odor. The PhEur 6.0 states that concentrated ammonia solution contains not less than 25.0% and not more than 30.0% w/w of ammonia (NH3). The USP32– NF27 states that strong ammonia solution contains not less than 27.0% and not more than 31.0% w/w of ammonia (NH3).

화학적 성질

Ammonia, NH3, is a colorless gaseous alkaline compound. It is very soluble in water, has a highly characteristic pungent odor, is lighter than air, and is formed as a result of the decomposition of most nitrogenous organic materials. Anhydrous ammonia, a major commercial chemical, is used in the manufacture of fertilizers, HN03, acrylonitrile, and other products, and as an electrolytic solvent.

화학적 성질

Ammonia is a colorless, strongly alkaline, and extremely soluble gas with a pungent, suffocating odor.

물리적 성질

Colorless gas with a penetrating, pungent, suffocating odor. An experimentally determined odor threshold concentration of 45.8 ppmv was reported by Leonardos et al. (1969). A detection odor threshold concentration of 11.6 mg/m3 (16.7 ppmv) was experimentally determined by Nishida et al. (1974).

역사

During the Middle Ages ammonia was produced by the distillation of animal dung, hooves, and horn. Its preparation from horn gave it another name: spirit of hartshorn. Joseph Priestley (1733–1804) isolated ammonia in 1774 and called the compound alkaline air. The modern name ammonia was given to the compound in 1782 by the Swedish chemist Torbern Bergman (1735–1784). The exact chemical composition was determined by Claude-Louis Berthollet (1748–1822) in 1785. During the 19th century ammonia was obtained from the distillation of coal tar. The importance of nitrogen fertilizers in agriculture was established during the mid-1800s, and this coupled with the growth of the chemical industry provided incentive to find a method for fixing nitrogen.

용도

Ammonia is a major feedstock for fertilizer, explosives, plastics, and other chemicals. The primary use of ammonia is in the production of fertilizers, with approximately 70% of ammonia being used for this purpose. Major fertilizers produced include ammonium nitrate, ammonium sulfate, and urea.

용도

NH3 (ammonia) is produced in the so-called Haber Bosch process. This industrial process uses finely divided iron as catalyst and a reaction temperature of around 450 °C at a pressure of 50 atm. Ammonia is used to produce fertilisers, nitric acid, nylon and many more products important to our modern life style.
N2(g) + 3H2(g) → 2NH3(g)

용도

Ammonia is used in the manufacture of nitricacid, hydrazine hydrate, and acrylonitrile, aswell as fertilizers, explosives, and syntheticfibers. It is also used in refrigeration.

용도

Ammonia is a large-tonnage industrial product and finds its major use in the manufacture of nitric acid and fertilizers. It is the most commonly used refrigerant, particularly for large industrial installations.

용도

Reagent for chemical vapor deposition of TiN.1

용도

Fertilizer, corrosion inhibitor, purification of water supplies, component of household cleaners, as refrigerant. manufacture of nitric acid, explosives, synthetic fibers, fertilizers. In pulp and paper, metallurgy, rubber, food and beverage, textile and leather industries.

정의

ChEBI: An azane that consists of a single nitrogen atom covelently bonded to three hydrogen atoms.

정의

A colorless gas with a characteristic pungent odor. On cooling and compression it forms a colorless liquid, which becomes a white solid on further cooling. Ammonia is very soluble in water (a saturated solution at 0°C contains 36.9% of ammonia): the aqueous solution is alkaline and contains a proportion of free ammonia. Ammonia is also soluble in ethanol. It occurs naturally to a small extent in the atmosphere, and is usually produced in the laboratory by heating an ammonium salt with a strong alkali. Ammonia is synthesized industrially from hydrogen and atmospheric nitrogen by the Haber process.
The compound does not burn readily in air but ignites, giving a yellowish-brown flame, in oxygen. It will react with atmospheric oxygen in the presence of platinum or a heavy metal catalyst – a reaction used as the basis of the commercial manufacture of nitric acid, which involves the oxidation of ammonia to nitrogen monoxide and then to nitrogen dioxide. Ammonia coordinates readily to form ammines and reacts with sodium or potassium to form inorganic amides and with acids to form ammonium salts; for example, it reacts with hydrogen chloride to form ammonium chloride:
NH3(g) + HCl(g) → NH4Cl(g)
Ammonia is also used commercially in the manufacture of fertilizers, mainly ammonium nitrate, urea, and ammonium sulfate. It is used to a smaller extent in the refrigeration industry. Liquid ammonia is an excellent solvent for certain substances, which ionize in the solutions to give ionic reactions similar to those occurring in aqueous solutions. Ammonia is marketed as the liquid, compressed in cylinders (‘anhydrous ammonia’), or as aqueous solutions of various strengths. See also ammonium hydroxide.

정의

ammonia: A colourless gas, NH3, with a strong pungent odour; r.d. 0.59 (relative to air); m.p. –77.7°C; b.p. –33.35°C. It is very soluble in water and soluble in alcohol. The compound may be prepared in the laboratory by reacting ammonium salts with bases such as calcium hydroxide, or by the hydrolysis of a nitride. Industrially it is made by the Haber process and over 80 million tonnes per year are used either directly or in combination. Major uses are the manufacture of nitric acid, ammonium nitrate, ammonium phosphate, and urea (the last three as fertilizers), explosives, dyestuffs and resins.
Liquid ammonia has some similarity to water as it is hydrogen bonded and has a moderate dielectric constant, which permits it to act as an ionizing solvent. It is weakly selfionized to give ammonium ions, NH4+and amide ions, NH2-. It also dissolves electropositive metals to give blue solutions, which are believed to contain solvated electrons. Ammonia is extremely soluble in water giving basic solutions that contain solvated NH3 molecules and small amounts of the ions NH4+ and OH-. The combustion of ammonia in air yields nitrogen and water. In the presence of catalysts NO, NO2, and water are formed; this last reaction is the basis for the industrial production of nitric acid. Ammonia is a good proton acceptor (i.e. it is a base) and gives rise to a series of ammonium salts, e.g.NH3 + HCl → NH4+ + Cl-.
It is also a reducing agent.
The participation of ammonia in the nitrogen cycle is a most important natural process. Nitrogen-flxing bacteria are able to achieve similar reactions to those of the Haber process, but under normal conditions of temperature and pressure. These release ammonium ions, which are converted by nitrifying bacteria into nitrite and nitrate ions.

생산 방법

Ammonia is obtained commercially chiefly by synthesis from its constituent elements, nitrogen and hydrogen, which are combined under high pressure and temperature in the presence of a catalyst. Ammonia solution is produced by dissolving ammonia gas in water.

생산 방법

The Haber process for the synthesis of ammonia is based on the reaction of nitrogen and hydrogen: N2(g) + 3H2(g) ? 2NH3(g). Nitrogen in the reaction is obtained by separating nitrogen from air through liquefaction, and hydrogen is obtained from natural gas by steam reforming: CH4(g) + H2O(g) → H2(g) + CO(g) According to Le Chatelier’s principle, the production of ammonia is favored by a high pressure and a low temperature. The Haber process is typically carried out at pressures between 200 and 400 atmospheres and temperatures of 500°C. In the commercial production of ammonia, NH3 is continually removed as it is produced.

공기와 물의 반응

Soluble in water with evolution of heat. The amount of heat generated may be large.

반응 프로필

AMMONIA is a base. Reacts exothermically with all acids. Violent reactions are possible. Readily combines with silver oxide or mercury to form compounds that explode on contact with halogens. When in contact with chlorates Ammonia forms explosive ammonium chlorate [Kirk-Othmer, 3rd ed., Vol. 2, 1978, p. 470]. Reacts violently or produces explosive products with fluorine, chlorine, bromine and iodine and some of the interhalogen compounds (bromine pentafluoride, chlorine trifluoride). Mixing of bleaching powder (hypochlorite solution) with ammonia solutions produces toxic/explosive ammonia trichloride vapors. Undergoes potentially violent or explosive reactions on contact with 1,2-dichloroethane (with liquid ammonia), boron halides, ethylene oxide (polymerization), perchlorates or strong oxidants (chromyl chloride, chromium trioxide, chromic acid, nitric acid, hydrogen peroxide, chlorates, fluorine, nitrogen oxide, liquid oxygen). Reacts with silver chloride, silver oxide, silver nitrate or silver azide to form the explosive silver nitride. May react with some heavy metal compounds (mercury, gold(III) chloride) to produce materials that may explode when dry. [Bretherick, 5th ed., 1995, p. 1553].

위험도

Inhalation of concentrated fumes may be fatal. Moderate fire risk, explosive limits in air 16– 25%. Forms explosive compounds in contact with silver or mercury. Eye damage and upper respiratory tract irritant.

건강위험

Vapors cause irritation of eyes and respiratory tract. Liquid will burn skin and eyes. Poisonous; may be fatal if inhaled. Contact may cause burns to skin and eyes. Contact with liquid may cause frostbite.

건강위험

Ammonia is intensely irritating to the eyes,nose, and respiratory tract. Toxic effectsinclude lachrymation, respiratory distress,chest pain, and pulmonary edema. A concentration of 10 ppm may be detected by odor;irritation of eyes and nose is perceptible atabout 200 ppm. A few minutes of exposureto 3000 ppm can be intolerable, causing seri ous blistering of the skin, lung edema, andasphyxia, leading to death. It is corrosive toskin because it reacts with moisture to formcaustic ammonium hydroxide. Long expo sure may result in destruction of tissues
LC50 value, inhalation (mice): 4200 ppm/hr.

화재위험

Mixing of ammonia with several chemicals can cause severe fire hazards and/or explosions. Ammonia in container may explode in heat of fire. Incompatible with many materials including silver and gold salts, halogens, alkali metals, nitrogen trichloride, potassium chlorate, chromyl chloride, oxygen halides, acid vapors, azides, ethylene oxide, picric acid and many other chemicals. Mixing with other chemicals and water. Hazardous polymerization may not occur.

인화성 및 폭발성

Ammonia vapor is slightly flammable (NFPA rating = 1) and ignites only with difficulty. Ammonia forms explosive mixtures with air in the range 16 to 25%. Water, carbon dioxide, or dry chemical extinguishers should be used for ammonia fires.

농업용

Anhydrous ammonia is an ammonium fertilizer made by the Haber-Bosch process, by reacting hydrogen with nitrogen in the ratio of 3: 1 at high temperatures (450 to 500'C) and pressure (about 500 atm) in the presence of an iron catalyst promoted by potassium and alumina. The nitrogen derived from air and the hydrogen obtained from (a) synthesis gas, (b) steam reforming of naptha, coal or coke (c) lignite, or (d) electrolysis of water, are purified by standard procedures before use. The anhydrous ammonia thus produced can be directly used as a fertilizer. It can also be converted to ammonium salts which are important fertilizers, by reacting ammonia with nitric, sulphuric and phosphoric acids. Anhydrous ammonia is also reacted with carbon dioxide to get urea which is another important source of nitrogen.
Anhydrous ammonia is an important fluid fertilizer and is the cheapest nitrogen source, having the highest nitrogen content (about 82 %) among nitrogenous fertilizers. However, because of safety and environmental considerations, many dealers and users are now switching over to other sources of nitrogen.
Anhydrous liquid ammonia can cause dehydration of tissue and severe damage to the skin, lungs and eyes by its freezing and caustic action. Because of the low vapor pressure (6 bar at lO℃, 9 bar at 20℃ and 12 bar at 3O℃), anhydrous ammonia must be stored and transported in pressure vessels.
Due to the volatile nature of anhydrous ammonia it has to be injected with an applicator 15 to 30 cm below the soil surface to be effective and to reduce ammonia loss. Ammonia loss depends on the soil type, its moisture content, and the depth to which the applicator is injected.
Ammonia applicators range in size from small 5-row rigs to large rigs that have a swath width of upto 20 m (65 feet) and are pulled by high-powered tractors. Anhydrous ammonia is usually metered by a variable orifice-type meter or by a piston pump.
Physical properties of anhydrous ammonia are somewhat similar to other liquids under pressure like butane or propane gas. Because of the difficulties in handling anhydrous ammonia, water solutions of ammonia, urea, ammonium phosphate or other soluble solid nitrogen materials are used widely. Anhydrous ammonia is also used in the preparation of protein feeds for cattle and sheep, and as a defoliant to hasten the shedding of cotton leaves to facilitate mechanical harvesting.

농업용

Anhydrous ammonia is the basic building block of almost all nitrogen fertilizer materials. Most of the world's ammonia is produced synthetically by a direct reaction of the elements by the Haber-Bosch process. The process involves an exothermic and reversible reaction that proceeds with a concurrent decrease in volume.
There are certain conditions for the above reaction to proceed optimally. These are: (a) temperature of 500℃, (b) pressure of 270 to 350 atmospheres, (c) a catalyst containing finely divided iron with molybdenum or calcium as a promoter, finely divided osmium or uranium, fmely divided nickel over pumice stone or ferric oxide with traces of silica and potassium oxide, and (d) pure gases (as otherwise the catalyst gets poisoned).
Free ammonia is extremely toxic to micro-organisms, animals and higher plants. Ammonia produced as a part of normal metabolism is immediately converted into a less harmful substance like urea and is excreted in urine. Ammonia can readily penetrate cell membranes whereas the ammonium ion is impermeable. There is a close relationship between the pH and the concentration of the free ammonium (NH4+) ion. The capacity of soil to retain ammonia increases with increasing soil moisture and clay content.
Ammonia is the least expensive and most widely used nitrogen fertilizer. It is used in the manufacture of other fertilizers like urea, ammonium sulphate and ammonium chloride.
Ammonia is also used in the manufacture of nitric acid, hydrazine hydrate, urethane, acrylonitrile and sodium carbonate (Solvay process). In addition, ammonia is used as a refrigerant, in nitriding of steels, in the petroleum industry, in the manufacture of explosives and rocket fuel, as a yeast nutrient, etc.
Anhydrous ammonia, which has great affity for water, contains approximately 82% nitrogen. This is the highest nitrogen content that any nitrogen fertilizer can have. As anhydrous ammonia is a gas at atmospheric pressure, to avoid its loss to the atmosphere during application, ammonia is injected at least 7 to 20 cm below the soil.
The simplest nitrogen solution is aqua ammonia which contains 25 to 29% ammonia by weight. Since ammonia volatilizes above 10°C, aqua ammonia is injected into the soil to a depth of 5 to 10 cm.

Pharmaceutical Applications

Ammonia solution is typically not used undiluted in pharmaceutical applications. Generally, it is used as a buffering agent or to adjust the pH of solutions. Most commonly, ammonia solution (the concentrated form) is used to produce more dilute ammonia solutions.
Therapeutically, dilute ammonia solution is used as a reflex stimulant in ‘smelling salts’, as a rubefacient, and as a counterirritant to neutralize insect bites or stings.

공업 용도

Ammonia (NH3) is an alkaline gas with a sharp, penetrating odor. Reacting nitrogen and hydrogen under pressure, in the presence of a catalyst, produces ammonia. Gaseous ammonia is flammable in air at concentrations of 15–28% by volume. Anhydrous liquid ammonia is a colorless liquid with a strong odor. Ammonia, because of its unique chemical properties to metal ions, is primarily used in hydrometallurgical processing. In the mineral processing industry, ammonia is rarely used as a pH regulator. There was only one operating plant in the world that used ammonia as a pH regulator in treatment of a copper/zinc ore.

Safety

Ingestion of strong solutions of ammonia is very harmful and causes severe pain in the mouth, throat, and gastrointestinal tract as well as severe local edema with cough, vomiting, and shock. Burns to the esophagus and stomach may result in perforation. Inhalation of the vapor causes sneezing, coughing, and, in high concentration, pulmonary edema. Asphyxia has been reported. The vapor is irritant to the eyes. Strong solutions are harmful when applied to the conjunctiva and mucous membranes. Topical application of even dilute ammonia solutions, used to treat insect bites, has caused burns, particularly when used with a subsequent dressing.
When used as an excipient, ammonia solution is generally present in a formulation in a highly diluted form.

잠재적 노출

Ammonia is used as a nitrogen source for many nitrogen-containing compounds. It is used in the production of ammonium sulfate and ammonium nitrate for fertilizers; and in the manufacture of nitric acid, soda; synthetic urea, synthetic fibers; dyes; and plastics. It is also utilized as a refrigerant and in the petroleum refining and chemical industries. It is used in the production of many drugs and pesticides. Other sources of occupational exposure include the silvering of mirrors, gluemaking, tanning of leather; and around nitriding furnaces. Ammonia is produced as a by-product in coal distillation and by the action of steam on calcium cyanamide, and from the decomposition of nitrogenous materials.

Source

Ammonia is released as a combustion product of coal, fuel oil, natural gas, wood, butane, and propane (quoted, Verschueren, 1983).
Ammonia naturally occurs in soybean (8,600 ppm), evening-primrose seeds (2,300–2,455 ppm), lambsquarter, and tobacco leaves (Duke, 1992).

환경귀착

Chemical/Physical. Reacts violently with acetaldehyde, ethylene oxide, ethylene dichloride (Patnaik, 1992).
Reacts with acids forming water soluble ammonium salts.

저장

On exposure to the air, ammonia solution rapidly loses ammonia. Ammonia solution should be stored in a well-closed container, protected from the air, in a cool, dry place. The storage temperature should not exceed 208℃.

저장

All work with ammonia should be conducted in a fume hood to prevent exposure by inhalation, and splash goggles and impermeable gloves should be worn at all times to prevent eye and skin contact. Cylinders of ammonia should be stored in locations appropriate for compressed gas storage and separated from incompatible compounds such as acids, halogens, and oxidizers. Only steel valves and fittings should be used on ammonia containers; copper, silver, and zinc should not be permitted to come into contact with ammonia.

운송 방법

Shipped in tank cars, tank trucks, barges, and steel cylinders. Labeling and restrictions vary with concentration: NA1005 Ammonia, anhydrous, Hazard Class: 2.2; Labels: 2.2-Nonflammable compressed gas, Domestic (U.S.), Inhalation Hazard (Special Provision 13). UN1005 Ammonia, anhydrous, Hazard Class: 2.3; Labels: 2.3-Poison Gas, 8-Corrosive material International, Inhalation Hazard Zone D. UN2672 Ammonia solutions, relative density between 0.880 and 0.957 @ 15 C in water, with .10 % but NOT . 35 % ammonia, Hazard class: 8; Labels: 8-Corrosive material. UN2073 Ammonia solution, relative density less than 0.880 @ 15 C in water, with . 35% but NOT . 50% ammonia, Hazard Class: 2.2; Labels: 2.2-Nonflammable compressed gas. Note: Also used for Ammonium hydroxide, CAS1336-21-6, Record A:0110.

Purification Methods

Dry the liquid, and store it, with sodium in a steel cylinder, then distil and condense it by means of liquid air, the non-condensable gases being pumped off. In order to obtain liquid NH3 from a cylinder, turn the cylinder upside-down (i.e. with the valve at the bottom, use a metal stand to secure it in this position) and lead a plastic tube from the tap to a measuring cylinder placed in an efficient fume cupboard which is kept running. Turn the tap on and allow the ammonia to be released. At first, gas and liquid will splatter out (make sure that the plastic tube is secure), but soon the liquid will drip into the measuring cylinder. The high latent heat of evaporation will cool the ammonia so that the liquid will remain cool and not boil vigorously. If the ammonia is required dry, the necessary precautions should be taken, i.e. the gas is allowed to flow through tubes packed with coarse CaO pellets. AMMONIA (gas, liquid or aqueous solution) is very irritating and should not be inhaled in any quantity as it can lead to olfactory paralysis (temporary or permanent).

비 호환성

Violent reaction with strong oxidizers and acids. Shock-sensitive compounds may be formed with gold, halogens, mercury, mercury oxide, and silver oxide. Fire and explosions may be caused by trimethylammonium amide, 1-chloro-2,4-dinitrobenzene, o-chloronitrobenzene, platinum, trioxygen difluoride, selenium difluoride dioxide, boron halides, mercury, chlorine, iodine, bromine, hypochlorites, chlorine bleach, amides, organic anhydrides; isocyanates, vinyl acetate; alkylene oxides; epichlorohydrin, and aldehydes. Attacks some coatings, plastics, rubber, copper, brass, bronze, aluminum, steel, tin, zinc, and their alloys.

비 호환성

Ammonia solution reacts vigorously with sulfuric acid or other strong mineral acids and the reaction generates considerable heat; the mixture boils.

폐기물 처리

Dilute with water, neutralize with HCl and discharge to sewer. Recovery is an option to disposal which should be considered for paper manufacture, textile treating, fertilizer manufacture and chemical process wastes.

Regulatory Status

Included in the FDA Inactive Ingredients Database (oral suspensions, topical preparations). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

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