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아황산

아황산
아황산 구조식 이미지
카스 번호:
7782-99-2
한글명:
아황산
동의어(한글):
아황산;아황산(SULFUROUSACID)
상품명:
Sulfurous Acid
동의어(영문):
Hso3;Hso3-;So3-2;yaliusuan;sulfurous;SULFUROUS ACID;SULPHUROUS ACID;schwefligesaure;SULPHUR DIOXIDE;Schweflige Sure
CBNumber:
CB6160852
분자식:
H2O3S
포뮬러 무게:
82.08
MOL 파일:
7782-99-2.mol

아황산 속성

밀도
1.03 g/mL at 25 °C(lit.)
증기 밀도
2.3 (vs air)
산도 계수 (pKa)
1.92(at 25℃)
물리적 상태
Liquid
색상
Colorless
수용성
Miscible with water.
감도
Air Sensitive
Merck
14,8976
안정성
Stable. Incompatible with strong bases.
InChIKey
LSNNMFCWUKXFEE-UHFFFAOYSA-N
CAS 데이터베이스
7782-99-2(CAS DataBase Reference)
EPA
Sulfurous acid (7782-99-2)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 C,Xn
위험 카페고리 넘버 20-34-36/38
안전지침서 26-36/37/39-45
유엔번호(UN No.) UN 1833 8/PG 2
WGK 독일 1
RTECS 번호 WT2775000
F 고인화성물질 10-23
TSCA Yes
위험 등급 8
포장분류 II
HS 번호 28111990
기존화학 물질 KE-32671
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
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
H318 눈에 심한 손상을 일으킴 심한 눈 손상 또는 자극성 물질 구분 1 위험 P280, P305+P351+P338, P310
H332 흡입하면 유해함 급성 독성 물질 흡입 구분 4 경고 P261, P271, P304+P340, P312
예방조치문구:
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P310 즉시 의료기관(의사)의 진찰을 받으시오. 삼켰다면 즉시 의료기관(의사)의 도움을 받으시오.
P301+P330+P331 삼켰다면 입을 씻어내시오. 토하게 하려 하지 마시오.
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.
P405 밀봉하여 저장하시오.
NFPA 704
1
3 1

아황산 C화학적 특성, 용도, 생산

개요

Sulfurous Acid is a weak and unstable inorganic acid, which is considered an aqueous solution of sulfur dioxide in water. It is formed theoretically by burning sulfur to produce sulfur dioxide, which is then reacted with water. However, there is no evidence that sulfurous acid exists in solution, while the molecules of which has been detected in the gas phase, since the reaction is reversible and the acid readily decomposes back into the reactants. Sulfurous acid is not usually available in its acid form, but more commonly prepared as its sodium or potassium salts.
Sulfurous acid and its salts are commonly applied as powerful reducing agents and disinfectant agents due to its strong reducibility. It is also considered as a mild bleaching agent especially for applications having chlorine sensitive materials. Besides, Sulfurous acid is a food additive listed on the EAFUS food Additive Database (Jan. 2001).

화학적 성질

colourless liquid

화학적 성질

SULFUROUS ACID, colorless liquid, prepared by dissolving SO2 in H2O. Reagent grade H2SO3 contains approximately 6% SO2 in solution

용도

As a bleaching agent, sulfurous acid is used for whitening wool, silk, feathers, sponge, straw, wood, and other natural products. In some areas, its use is permitted for bleaching and preserving dried fruits. The salts of sulfurous acid are sulfites.

용도

Sulfurous acid (H2SO3) can be produced by burning sulfur to form sulfur dioxide (SO2) gas and by then dissolving the gas in water to form sulfurous acid. This is the acid produced by burning coal that has a high sulfur content; the gaseous sulfur dioxide by-product of combustion then combines with atmospheric water to form “acid rain.”

용도

Dental bleach.

정의

A weak acid found only in solution, made by passing sulfur(IV) oxide into water. The solution is unstable and smells of sulfur(IV) oxide. It is a reducing agent, converting iron(III) ions to iron(II) ions, chlorine to chloride ions, and orange dichromate(VI) ions to green chromium(III) ions.

일반 설명

Sulfurous acid, H2S03, is an unstable, water-soluble, colorless liquid with a pungent burning sulfur odor. Corrosive to metals and tissue. It is derived from absorption of sulfur dioxide( S02) in water.Reagent grade sulfurous acid contains about 6% sulfur dioxide in solution. Sulfurous acid is a strong reducing agent.It is readily oxidized to sulfuric acid and is itself reduced to hydrogen sulfide by zinc and dilute sulfuric acid. Sulfurous acid is used in the synthesis of medicines and chemicals, in the manufacture of paper and wine, in brewing, in metallurgy, in ore flotation, as a bleach and analytical reagent, and for refining of petroleum products.

공기와 물의 반응

Soluble in water with release of heat.

반응 프로필

Colorless, corrosive, moderately toxic liquid. When heated to decomposition SULFUROUS ACID emits toxic fumes of oxides of sulfur [Lewis, 3rd ed., 1993, p. 1196].

위험도

Toxic by ingestion and inhalation, strong irritant to tissue.

건강위험

TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

화재위험

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.

공업 용도

Sulfurous acid (H2SO3) is usually marketed as liquid SO2. The bulk of SO2 is produced from off-smelter gases. Although handling of SO2 liquid requires special equipment, it is frequently used as a pH regulator and depressant, primarily during the treatment of complex sulfide ores. SO2 is largely used in North American operations as a pyrite depressant and for the depression of galena during copper/lead separation.

Safety Profile

A poison by ingestion and inhalation. A corrosive irritant to skin, eyes, and mucous membranes. Human systemic effects by ingestion: nausea or vomiting, hypermotility, diarrhea, and othergastrointestinal effects. When heated to decomposition it emits highly toxic fumes ofSOx.

참고 문헌

https://en.wikipedia.org/wiki/Sulfurous_acid
http://printwiki.org/Sulfurous_Acid
http://www.softschools.com/formulas/chemistry/sulfurous_acid_uses_properties_structure_formula/242/
https://pubchem.ncbi.nlm.nih.gov/compound/Sulfurous_acid#section=Top
http://www.chemistrylearner.com/sulfurous-acid.html

아황산 준비 용품 및 원자재

원자재

준비 용품


아황산 공급 업체

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Qingdao kaimoshi biochemical technology co., ltd.
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Shaanxi Dideu Medichem Co. Ltd
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Henan Alfa Chemical Co., Ltd
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Shanghai Aladdin Bio-Chem Technology Co.,LTD 400-620-6333 021-20337333-801
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Alfa Aesar 400-610-6006
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