Sodium sulfide powder in food preservative

Brief Description
Classification: Sulfide Type: Sodium Sulfide CAS No.: 1313-82-2
Other Names: Sodium sulfide dihydrate MF: Na2S EINECS No.: 215-212-0
Place of Origin: Hubei China (Mainland) Grade Standard: Agriculture Grade, Industrial G... Purity: 60%
Appearance: yellow or red powder Application: widespread use Brand Name: XZS
HazardClass: 4.2  
Delivery Terms & Packaging
Packaging Detail:In plastic woven bag,25/50/750kg net weight or as your custom pack.
Delivery Detail:1-2 weeks
Specifications
Sodium sulfide powder in food preservative

Uses:
1, pulp and paper industry
2, water treatment
3,textile industry and chemical manufacturing
4,production of rubber

Sodium sulfide refers to the chemical compound with the formula Na2S, but more commonly it refers to the hydrate Na2S·9H2O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na2S and its hydrates emit hydrogen sulfide, which smells like rotten eggs. Some commercial samples are specified as Na2xH2O, where a weight percentage of Na2S is specified. Commonly available grades have around 60% Na2S by weight, which means that x is around 3. Such technical grades of sodium sulfide have a yellow appearance owing to the presence of polysulfides. These grades of sodium sulfide are marketed as 'sodium sulfide flakes'. Although the solid is yellow, solutions of it are colorless.

Uses:

 

It is primarily used in pulp and paper industry in the kraft process . It is used in water treatment as an oxygen scavenger agent,[removed reference to photographic developer; as sulphides are detrimental to all processess except auxiliary toning], in textile industry as a bleaching, as a desulfurising and as a dechlorinating agent and in leather trade for the sulfitisation of tanning extracts. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds. It is used in other applications including ore flotation, oil recovery, food preservative, making dyes, and detergent.

Sodium sulfide is an active ingredient in some Over-the-Counter Toenail Relief Products