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산화칼슘(생석회)

산화칼슘(생석회)
산화칼슘(생석회) 구조식 이미지
카스 번호:
1305-78-8
한글명:
산화칼슘(생석회)
동의어(한글):
석회;소화되지않은석회;조약돌석회;칼슘모노산화물;칼실(CALXYL)생석회;탄석회(BURNTLIME)부식제석회;산화칼슘;산화칼슘(생석회);칼실;칼슘옥사이드
상품명:
Calcium oxide
동의어(영문):
CaO;LIME;CALX;cml21;cml31;Calcia;calxyl;CAUSTIC;airlock;Dynacal
CBNumber:
CB2853017
분자식:
CaO
포뮬러 무게:
56.08
MOL 파일:
1305-78-8.mol

산화칼슘(생석회) 속성

녹는점
2570 °C
끓는 점
2850 °C(lit.)
밀도
3.3 g/mL at 25 °C(lit.)
굴절률
1.83
인화점
2850°C
저장 조건
Store at RT.
용해도
1.65g/l Risk of violent reaction.
물리적 상태
powder
색상
White to yellow-very slightly beige
Specific Gravity
3.3
수소이온지수(pH)
12.6 (H2O, 20℃)(saturated solution)
수용성
REACTS
감도
Air & Moisture Sensitive
Merck
14,1686
안정성
Stability Stable, but absorbs carbon dioxide from the air. Incompatible with water, moisture, fluorine, strong acids.
CAS 데이터베이스
1305-78-8(CAS DataBase Reference)
NIST
Calcium monoxide(1305-78-8)
EPA
Calcium oxide (CaO)(1305-78-8)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 C,Xi
위험 카페고리 넘버 34-41-37/38
안전지침서 26-36/37/39-45-25-39
유엔번호(UN No.) 1910
WGK 독일 1
RTECS 번호 EW3100000
F 고인화성물질 10-21-34
TSCA Yes
위험 등급 8
포장분류 III
HS 번호 28259019
유해 물질 데이터 1305-78-8(Hazardous Substances Data)
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
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
H335 호흡 자극성을 일으킬 수 있음 특정 표적장기 독성 - 1회 노출;호흡기계 자극 구분 3 경고
예방조치문구:
P261 분진·흄·가스·미스트·증기·...·스프레이의 흡입을 피하시오.
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P304+P340 흡입하면 신선한 공기가 있는 곳으로 옮기고 호흡하기 쉬운 자세로 안정을 취하시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.
P405 밀봉하여 저장하시오.

산화칼슘(생석회) C화학적 특성, 용도, 생산

개요

Calcium oxide (CaO, CAS Reg. No. 1305-78-8) is also known as lime, quick lime, burnt lime, or calx. Lime does not occur naturally since it reacts so readily with water (to form hydrated lime) and carbon dioxide (to form limestone). It is produced from calcium carbonate, limestone, or oyster shells by calcination at temperatures of 1,700-2,450℃.
Calcium Oxide is a solid with a very high affinity for water - it will react with water in the air, or in your skin or anywhere it can and form calcium hydroxide. This reaction is exothermic so it releases a lot of heat while it is reacting - there fore as well as being corrosive and causing significant skin irritation, calcium oxide's reaction with water can also cause burns. Calcium hydroxide is basically hydrated calcium oxide. It is alkali so can be corrosive. In solution it makes limewater.
CaO is not found pure in nature but rather is contained in various abundant minerals (i.e. calcite, aragonite, limestone, marble) but vary greatly in their purity (impurities usually include magnesia, iron, alumina, silica, sulfur). Of these iron and sulfur are most troublesome (i.e. where clarity is important in glass). Lime minerals vary in the degree of crystallization and cohesion of the crystalline mass and the homogeneity of the matrix.
Calcium oxide is the principle flux in medium and high temperature glazes, beginning its action (within the glaze) around 1100C. It must be used with care in high-fire bodies because its active fluxing action can produce a body that is too volatile (melting if slightly overfired).
Lime, or calcium oxide, is a principle ingredient in the production of Portland cement, the basis for most mortars and concrete. Hydrated or ‘slaked’ lime is the chemical calcium hydroxide. This chemical is also used in mortars. Both types of lime are strong bases and are also used in food production (calcium hydroxide is commonly used in making corn tortillas), petroleum refining and sewage treatment. In the household it is used by aquarium hobbyists to add bioavailable calcium to fish tanks. It is also found in hair relaxers.

화학적 성질

white to grey solid

화학적 성질

Calcium oxide, CaO, occurs as white or grayish-white lumps or granular powder. The presence of iron gives it a yellowish or brownish tint.

화학적 성질

This citrus plant is widespread and extensively cultivated, especially in Central America, Mexico, Florida, Haiti and Barbados; it also grows well in India. It is cultivated to a limited extent in Calabria (Italy). The varieties from the different countries of origin can be either sweet or sour. The sour varieties are the most important for extractive purposes. This plant (morphologically similar to those of the citrus family) has the peculiarity of yielding flowers and fruits year-round in Central America. The tree is propagated from seeds or by grafting onto bitter orange. The maximum fruit yield occurs after 10 years. The parts used are the leaves, small unripe fruits, rinds, juice and twigs. Lime has an intensely fresh, citrus aroma and an astringent, sweet-sour flavor

물리적 성질

Calcium oxide is a white caustic crystalline alkali substance that goes by the common name lime. The term lime is used both generically for several calcium compounds and with adjectives to qualify different forms of lime. This entry equates lime, also called quicklime or burnt lime, with the compound calcium oxide. Hydrated lime, made by combining lime with water, is calcium hydroxide and is often referred to as slaked lime (Ca(OH)2). Dolomite limes contain magnesium as well as calcium. Limestone is the compound calcium carbonate. The term lime comes from the Old English word l?m for a sticky substance and denotes lime’s traditional use to produce mortar. Calx was the Latin word for lime and was used to name the element calcium.

역사

Calcium oxide dates from prehistoric times. It is produced by heating limestone to drive off carbon dioxide in a process called calcination: CaCO3(s) CaO(s) + CO2(g). At temperatures of several hundred degrees Celsius, the reaction is reversible and calcium oxide will react with atmospheric carbon dioxide to produce calcium carbonate. Efficient calcium oxide production is favored at temperatures in excess of 1,000°C. In prehistoric times limestone was heated in open fires to produce lime. Over time, lined pits and kilns were used to produce lime. Brick lime kilns were extensively built starting in the 17th century and the technology to produce lime has remained relatively constant since then.

용도

The major uses of lime are metallurgy, flue gas desulfurization, construction, mining, papermaking, and water treatment. About one third of calcium oxide production in the United States is used for metallurgical processes, principally in the iron and steel industry. Calcium oxide is used to remove impurities during the refining of iron ore. Calcium oxide combines with compounds such as silicates, phosphates, and sulfates contained in iron ores to form slag. Lime is also used for purification in other metal refining and to control pH in mining processes such as leaching and precipitation. The calcium oxide is also used in remediation of mine wastes to recover cyanides and to neutralize acid mine drainage.

용도

In bricks, plaster, mortar, stucco and other building and construction materials; manufacture of steel, aluminum, magnesium, and flotation of non-ferrous ores; manufacture of glass, paper, Na2CO3 (Solvay process), Ca salts and many other industrial chemicals; dehairing hides; clarification of cane and beet sugar juices; in fungicides, insecticides, drilling fluids, lubricants; water and sewage treatment; in laboratory to absorb CO2 (the combination with NaOH is known as soda-lime, q.v.).

용도

Calcium Oxide is a general food additive consisting of white granules or powder of poor water solubility. it is obtained by heating limestone (calcium carbonate) in a furnace. it is also termed lime or quicklime. it is used as an anticaking agent, firming agent, and nutritive supple- ment in applications such as grain products and soft candy.

정의

ChEBI: A member of the class of calcium oxides of calcium and oxygen in a 1:1 ratio.

Composition

Leaves contain ascorbic acid, bergapten, coumarins, citropten, isopimpinellin. Fruits contain: ascorbic acid, α-bergamotene, bergamottin, bergapten, α-bisabolene, β-bisabolene, borneol, cadinen, calcium, camphene, β-carotene, caryophyllene, 1,4-cineole, 1,8-cineole, citral, citric acid, citronellal, citropten, copper, p-cymene, decanal, decanol, decyl-acetate, dimethoxycoumarin, α-p-dimethyl-styrene, dodecanal, fenchol, furfural, geraniol, geranyl-acetate, hesperidin, iron, isoimperatorin, isopimpinellin, levarterenol, limonene, d-limonene, linalool, linoleic acid, α-linolenic acid, lysine, malic acid, malonic acid, methionine, 5-methoxy-psoralen, methyl-heptenone, myrcene, myristic acid, neral, neryl-acetate, neryl-formate, niacin, nonanal, nonane, nonanol, nootkatone, octanal, octanoic acid, octanol, oxalic acid, palmitic acid, palmitoleic acid, pantothenic acid, α-phellandrene, β-phellandrene, phlobotannin, phosphorus, α-pinene, β-pinene, potassium, quinic acid, riboflavin, sabinene, γ-selinene, sodium, stearic acid, succinic acid, α-terpinene, γ-terpinene, terpinen-1-ol, terpinen-4-ol, α-terpineol, β-terpineol, terpinolene, thiamine, α-thujene, thymyl-methyl-ether, tridecane, 2,6,6-trimethyl-2-vinyl-tetrahydropyran, α,α-p-trimethylbenzyl-alcohol, tryptophan, undecane, xanthophylls, zinc. Fruit peel contains cutin.

Aroma threshold values

Aroma at 1.0%: intense, high impacting fresh sweet juicy lime, citral with a distilled lime note, cool and refreshing with green juicy nuances.

Taste threshold values

Taste characteristics at 10 ppm in 5% sugar and 0.1% CA; intense fresh tangy lime juice, citrus citral candy lime character with notes of West Indian lime

일반 설명

An odorless, white or gray-white solid in the form of hard lumps. A strong irritant to skin, eyes and mucous membranes. Used in insecticides and fertilizers.

공기와 물의 반응

Crumbles on exposure to moist air. Reacts with water to form corrosive calcium hydroxide, with evolution of much heat. Temperatures as high as 800° C have been reached with addition of water (moisture in air or soil). The heat of this reaction has caused ignition of neighboring quantities of sulfur, gunpowder, wood, and straw [Mellor 3: 673 1946-47].

반응 프로필

A base and an oxidizing agent. Neutralizes acids with generation of heat. Nonflammable, but will support combustion by liberation of oxygen, especially in the presence of organic materials. Reacts very violently with liquid hydrofluoric acid [Mellor 2, Supp. 1:129 1956]. Reacts extremely violently with phosphorus pentaoxide when reaction is initiated by local heating [Mellor 8 Supp.3:406 1971].

위험도

Evolves heat on exposure to water. Danger- ous near organic materials. Upper respiratory tract irritant.

건강위험

Causes burns on mucous membrane and skin. Inhalation of dust causes sneezing.

화재위험

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

농업용

Calcium oxide (CaO) is a white powder with a neutralizing value or calcium carbonate equivalent (CCE) of 179%, compared to 100% for calcium carbonate (CaCO3). For quick results, either calcium oxide or calcium hydroxide [Ca(OH)2] is used. Calcium oxide is also known as lime, unslaked lime, burned lime or quicklime. Roasting CaCO3 in a furnace makes calcium oxide. A complete mixing of calcium oxide with soil is difficult because it cakes due to absorption of water.

농업용

Lime is a white caustic alkaline substance. It consists of calcium oxide which is obtained by heating limestone, and has a high neutralizing value.

공업 용도

Lime is the most widely used reagent in the mineral industry for flotation of sulfides and, in some cases, non-sulfide minerals. The word “lime” is a general term used to describe any kind of calcareous material or finely divided form of limestone and dolomite. In more strict chemical terms, lime is calcinated limestone known as calcium oxide (CaO), quicklime or unslaked lime.The slaked or hydrated lime Ca(OH)2 is the form of lime primarily used in mineral flotation. Production of high-calcium lime is based on calcination of limestone at a temperature of 1100–1300 °C in kilns.
CaCO3+heat ? CaO+CO2 For high-magnesium (dolomitic) limestone, the calcination reaction (at 1000–1200 °C) is CaCO3·MgCO3 (limestone) + heat ? CaOMgO (quicklime-2CO2)

Safety Profile

A caustic and irritating material. See also CALCIUM COMPOUNDS. A common air contaminant. A powerful caustic to living tissue. The powdered oxide may react explosively with water. Mixtures with ethanol may igmte if heated and thus can cause an air-vapor explosion. Violent reaction with (I3203 + CaCl2) interhalogens (e.g., BF3, CIF3), F2, HF, P2O5 + heat, water. Incandescent reaction with liquid HF. Incompatible with phosphoms(V) oxide.

잠재적 노출

Calcium oxide is used as a refractory material; a binding agent in bricks; plaster, mortar, stucco, and other building materials. A dehydrating agent, a flux in steel manufacturing, and a labora

운송 방법

UN1910 Calcium oxide, Hazard class: 8; Labels: 8-Corrosive material.

비 호환성

The water solution is a medium strong base. Reacts with water, forming calcium hydroxide and sufficient heat to ignite nearby combustible materials. Reacts violently with acids, halogens, metals.

폐기물 처리

Pretreatment involves neutralization with hydrochloric acid to yield calcium chloride. The calcium chloride formed is treated with soda ash to yield the insoluble calcium carbonate. The remaining brine solution may be discharged into sewers and waterways

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