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히드로아황산 나트륨

히드로아황산 나트륨
히드로아황산 나트륨 구조식 이미지
카스 번호:
히드로아황산 나트륨
Sodium dithionite
burmol;hydros;blankit;LYKOPON;v-briteb;vatrolite;SODIUM HYDR;HYDROSULFITE;Natriumdithionit;SODIUM DITHIONITE
포뮬러 무게:
MOL 파일:

히드로아황산 나트륨 속성

300 °C
끓는 점
저장 조건
Store at RT.
250 g/L (20°C)
물리적 상태
5.5-8.5 (50g/l, H2O, 20℃)
250 g/L (20 ºC)
Moisture Sensitive
Stable, but air sensitive. Incompatible with strong acids, strong oxidizing agents, water, moisture.
CAS 데이터베이스
7775-14-6(CAS DataBase Reference)
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xn
위험 카페고리 넘버 7-22-31
안전지침서 26-28-43-7/8-43E-28A
유엔번호(UN No.) UN 1384 4.2/PG 2
WGK 독일 1
F 고인화성물질 1-10
자연 발화 온도 >200 °C
위험 등급 4.2
포장분류 II
HS 번호 28311010
유해 물질 데이터 7775-14-6(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 2500 mg/kg
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H251 자기발열성; 화재를 일으킬 수 있음 자기발열성 물질 및 혼합물 구분 1 위험
H302 삼키면 유해함 급성 독성 물질 - 경구 구분 4 경고 P264, P270, P301+P312, P330, P501
P235+P410 저온으로 유지하고 직사광선을 피하시오.
P407 적하물(파레트) 사이에는 간격을 유지하시오.
P413 ...℃/...℉를 넘지 않는 온도에서는 보다 크게 대량으로 보관하시오.
P420 격리하여 보관하시오.

히드로아황산 나트륨 C화학적 특성, 용도, 생산

화학적 성질

White solid


Reducing agent for vat dyes,reducing hair bleaching agents,vat dyes printing auxiliaries, silk scouring and bleaching agents, coloring agents and objects stripping vat cleaning agent


As reducing agent, particularly in dyeing with indigo and vat dyes; bleaching soaps, straw; removing dyes from dyed fabrics.


ChEBI: An inorganic sodium salt that is the disodium salt of dithionous acid.

생산 방법

An alternative route for dithionite production is the reduction of sodium bisulfite with sodium borohydride. Sodium borohydride is obtained by reacting boron trimethyl ester, B(OCH3)3, with sodium hydride, NaH. The resulting product is hydrolyzed with water, and methanol is evaporated. An alkaline, aqueous solution is obtained, containing about 12% NaBH4 and 40% NaOH. This solution is commercially available. Reaction to dithionite is made on-site by adding sulfur dioxide and some additional caustic soda. Storages, handling and mixing of sulfur dioxide and of the Borol® liquid are not everywhere cost competitive.
NaBH4+8NaOH+8SO2 → 4Na2S2O4+NaBO2+6H2O.

제조 방법

Sodium dithionite is today produced mainly from sodium formate and sulfur dioxide. Zinc dithionite, prepared on-site from sulfur dioxide and zinc dust, was formerly more important than the sodium salt. The heavy metal zinc ended up in the effluent, which caused environmental problems. Today in pulp mills on-site production of zinc dithionite is no longer practiced. The number of plants using sodium amalgam and sulfur dioxide for dithionite production is decreasing with the number of amalgam cells in electrolysis. On-site generation of dithionite from alkaline sodium borohydride solution, sodium bisulfite, and sulfur dioxide is used by some mills.
Sodium dithionite is available as crystalline powder (&90% Na2S2O4) or as a refrigerated 150 g/L solution stabilized with alkali. The white crystals can decompose on heating. Low alkalinity, pH8 to 13, stabilizes dithionite solution at low temperature.
These solutions should be kept well below 10 °C with the exclusion of air. In presence of air, oxidation rapidly yields sulfate and sulfite.
The powder product prepared via the amalgam route dissolves into an alkaline solution as it contains sodium carbonate and sulfite. This can trigger the precipitation of calcium carbonate (water hardness) in the solution tank. Therefore, it is recommended to add small amounts of chelants during the dissolution step. (Chelants are not required to stabilize the bleaching reaction.) Sodium dithionite prepared by the formate route dissolves into a slightly acidic solution. Dithionite powder can ignite if exposed to high humidity or elevated temperature.

일반 설명

Sodium dithionite is a whitish to light yellow crystalline solid having a sulfur dioxide-like odor. Sodium dithionite spontaneously heats on contact with air and moisture. This heat may be sufficient to ignite surrounding combustible materials. Sodium dithionite is soluble in water. Under prolonged exposure to fire or intense heat containers of Sodium dithionite may violently rupture. Sodium dithionite is used in dyeing and to bleach paper pulp.

반응 프로필

Inorganic reducing agents, such as Sodium dithionite, react with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. Their reactions with oxidizing agents may be violent. Sulfites and hydrosulfites (dithionites) can react explosively with strong oxidizing agents (sodium chlorite). Sulfites generate gaseous sulfur dioxide in contact with oxidizing acids and nonoxidizing acids.


Fire risk in contact with moisture. To extin- guish fires, flood the reacting mass with water.


Fire will produce irritating, corrosive and/or toxic gases. Inhalation of decomposition products may cause severe injury or death. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control may cause pollution.


Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.

Safety Profile

Toxic and an irritant. An allergen. Flammable when exposed to heat or flame. Ignites on contact with water or sodium chlorite. To extinpsh fires, flood the reacting mass with water. Decomposes violently when heated to 19OOC and emits toxic fumes of SOx and NazO


Sodium dithionite crystals are available in steel containers (1 or 2 tons) or in steel drums (200 kg). Because of the danger of spontaneous ignition in humid air, sodium dithionite must be stored under dry and cool conditions. The sites for the preparation of dithionite solutions must permit handling without risks, high humidity should be avoided and remote fire control should be available.
Commercial dithionite products are classified as self-igniting hazardous goods (Class 4.2, UN 1384). Local rules for transportation and storage must be obeyed.

히드로아황산 나트륨 준비 용품 및 원자재


준비 용품

히드로아황산 나트륨 공급 업체

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Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32447 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1852 55
career henan chemical co
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Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23978 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28236 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 8922 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23049 58
Chongqing Chemdad Co., Ltd
+86-13650506873 CHINA 30864 58
Sino Chem Mongolia Alliance Ltd. +86-131-10056998
+86-022-23686656 China 9 60
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 China 24986 65

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