Product: Sodium Hydrosulfide (NaHS)

CAS No.:16721-80-5

Hazard Class: 8 (Corrosive) + 4.2 (Spontaneously Combustible)

UN No.: 2318 (Solid) / 2949 (Solution)

Appearance:

Solid: Yellow flakes or granules

Solution: Colorless to amber liquid

Description: Sodium hydrosulfide is produced by absorbing hydrogen sulfide gas in sodium hydroxide solution, serving as a versatile sulfur source with stronger reducing power than Na₂S. Its dual functionality (providing both HS⁻ and OH⁻ ions) makes it essential for:

Mining: Copper/Nickel ore flotation agent

Leather: Hair removal in tanning (pH 9-11)

Pulp & Paper: Anthraquinone catalyst recovery

Chemical Synthesis: Thiochemical intermediate