应用
Sodium metabisulfite is used as an active ingredient in campden tablets, as a cleaning agent for potable water reverse osmosis membranes, as a preservative and an antioxidant in food. It also acts as a corrosion inhibitor in oil and gas industry, as a bleaching agent in the production of coconut cream, as the source of sulfur dioxide and in the destruction of cyanide in commercial gold cyanidation processes. It is utilized in the precipitation of gold from auric acid as well as in the waste water treatment to remove hexavaent chromium as trivalent chromium by precipitation after reduction. Further, it is used in photography. In addition, it plays as an oxygen scavenger to eliminate the dissolved oxygen in wastewater and in pipes.

Grade Specifications
Maximum level of impurities: Insoluble matter 0.005%, Cl 0.05%, Heavy Metals (as Pb) 0.001%, Fe 0.002%, S₂O₃0.05%

备注
Moisture and air sensitive. Incompatible with strong oxidizing agents and strong acids.

基本信息

MDL
MFCD00167602

EINECS
231-673-0

分子式
Na₂O₅S₂

分子量
190.10

熔点
>300°

密度
1.480

灵敏度
Moisture Sensitive. Air Sensitive. Store under Nitrogen. Ambient temperatures.

形态
Crystalline powder

溶解性
Soluble in water, ethanol and glycerol.

Merck
14,8638

GHS危害和防范说明

GHS符号

Hazard Statements
H302-H318
Harmful if swallowed.Causes serious eye damage.

Precautionary Statements
P280i-P264-P305+P351+P338-P310a-P301+P312a-P501a
Wear eye/face protection.Wash thoroughly after handling.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.Dispose of contents/container in accordance with local/regional/national/international regulations.

安全信息

危险类别
22-31-41
Harmful if swallowed.Contact with acids liberates toxic gas.Risk of serious damage to eyes.

安全等级
26-39-46
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection.If swallowed, seek medical advice immediately and show this container or label.

欧盟危险品标志

RTECS
UX8225000

TSCA
是