Nouryon Sodium Hydrosulfide 42%

Nouryon Sodium Hydrosulfide 42% is an economical form of reactive sulfur, typically a light-yellow colored liquid solution with the distinctive odor of rotten eggs. It is soluble in both alcohol and water. When Sodium Hydrosulfide comes into contact with acids, it releases hydrogen sulfide (H₂S), a toxic gas.

Chemical Name: Sodium Hydrogen Sulphide

CAS Number: 16721-80-5

Chemical Family: Inorganic Acids

Labeling Claims: Not Listed In California Proposition 65

Applicable Processes: Flame Retardant Production, Leather-Dehairing, Mining Applications, Plastics Manufacturing, Textile Treatment, Vulcanization Accelerators Manufacturing

Synonyms: Hydrogen sodium sulfide (HNaS), NSC 158264, Sodium bisulfide, Sodium hydrogen sulfide (NaHS), Sodium hydrosulfide (Na(HS)), Sodium mercaptan, Sodium mercaptide, Sodium sulfhydrate, Sodium sulfide (Na(SH))

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Identification & Functionality

Features & Benefits

Applications & Uses

Applicable Processes
Compatible Substrates & Surfaces
Industrial Additives End Use
Application Information
  • Sodium hydrosulfide is used as a reactive form of sulfur and acts as an intermediate in the production of other chemicals, including thio-chemicals used in textile processing, in the production of flame retardant resins, and in vulcanization accelerators.
  • Sodium hydrosulfide is also used as a processing aid in the production of a variety of industrial products.
  • It is a de-hairing agent in the production of fine leathers.
  • In mining, it is a flotation agent, helpful in the precipitation of metals from ore slurries.
  • Sodium hydrosulfide is also valuable as a raw material in the production of heat-resistant plastics for the auto and electronic industries.
  • In paper making, Sodium hydrosulfide is used to add sulfidity to cooking liquor in kraft pulp mills.


Physical Form
Soluble In
ValueUnitsTest Method / Conditions
Molecular Weight56.06--
Sodium Sulfidemax. 3wt%-
Sodium Hydrogen Sulfide Contentmin. 40wt%-
Total Sulfide Content (as NaSH)min. 42wt%-

Regulatory & Compliance

Safety & Health

Safety and Handling Information
  • Sodium Hydrosulfide 42% is classified as a hazardous substance.
  • Although hydrogen sulfide (H2S) forms a stable bond with caustic in the NaSH solution, toxic vapor concentrations of H2S above the liquid are possible and typical for high quality NaSH solutions.
  • For this reason NaSH should always be handled in closed systems under inert gas while vapors should be treated before venting into the air.
  • Tank containers should not be opened at any time unless the tank is properly decontaminated

Packaging & Availability

Packaging Type
Supplied by
Packaging and Transport Information

Shipped in: Tank Trailers, ISO Tank Containers and Rail Tank Cars.

Storage & Handling

Storage Information

Store under nitrogen atmosphere in closed storage tanks.