ChemicalBook
Chinese English Japanese Germany Korea

히드로아황산 나트륨

히드로아황산 나트륨
히드로아황산 나트륨 구조식 이미지
카스 번호:
7775-14-6
한글명:
히드로아황산 나트륨
동의어(한글):
차아황산나트륨;다이소듐다이싸이온산염;아디티온산나트륨;하이드로설파이트;히드로아황산나트륨;차아황산나트륨
상품명:
Sodium dithionite
동의어(영문):
burmol;hydros;blankit;LYKOPON;v-briteb;vatrolite;SODIUM HYDR;HYDROSULFITE;Natriumdithionit;SODIUM DITHIONITE
CBNumber:
CB1155576
분자식:
Na2O4S2
포뮬러 무게:
174.11
MOL 파일:
7775-14-6.mol

히드로아황산 나트륨 속성

녹는점
300 °C
끓는 점
1390°C
밀도
2.13
인화점
>100°C
저장 조건
Store at RT.
용해도
250 g/L (20°C)
물리적 상태
Powder/Solid
색상
White
수소이온지수(pH)
5.5-8.5 (50g/l, H2O, 20℃)
수용성
250 g/L (20 ºC)
감도
Moisture Sensitive
Merck
14,8626
안정성
Stable, but air sensitive. Incompatible with strong acids, strong oxidizing agents, water, moisture.
CAS 데이터베이스
7775-14-6(CAS DataBase Reference)
안전
  • 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
TSCA Yes
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
그림문자(GHS):
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
예방조치문구:
P235+P410 저온으로 유지하고 직사광선을 피하시오.
P407 적하물(파레트) 사이에는 간격을 유지하시오.
P413 ...℃/...℉를 넘지 않는 온도에서는 ...kg/...lbs 보다 크게 대량으로 보관하시오.
P420 격리하여 보관하시오.

히드로아황산 나트륨 C화학적 특성, 용도, 생산

화학적 성질

White solid

용도

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

용도

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

정의

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.

위험도

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

건강위험

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.

화재위험

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

저장

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

원자재

준비 용품


히드로아황산 나트륨 공급 업체

글로벌( 260)공급 업체
공급자 전화 팩스 이메일 국가 제품 수 이점
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32447 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 info@tnjchem.com China 1852 55
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 30004 58
Chemwill Asia Co.,Ltd.
86-21-51086038
86-21-51861608 chemwill_asia@126.com;sales@chemwill.com;chemwill@hotmail.com;chemwill@gmail.com CHINA 23978 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 sales@jushengtech.com CHINA 28236 58
Haihang Industry Co.,Ltd
86-531-88032799
+86 531 8582 1093 export@haihangchem.com CHINA 8922 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 sales@guangaobio.com CHINA 23049 58
Chongqing Chemdad Co., Ltd
+86-13650506873
sales@chemdad.com CHINA 30864 58
Sino Chem Mongolia Alliance Ltd. +86-131-10056998
+86-022-23686656 sinongolia-chem@163.com China 9 60
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 sale@aladdin-e.com China 24986 65

히드로아황산 나트륨 관련 검색:

Copyright 2019 © ChemicalBook. All rights reserved