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Sodium Hydrosulfide CAS#16721-80-5

High Reactivity and Strong Alkalinity – Forms a strongly alkaline solution in water, providing excellent reactivity for sulfide-based chemical processing and industrial synthesis.

Multiple Physical Forms for Flexible Handling – Available as blocks, granules, or powders, allowing easy dosing, transportation, and adaptation to different production requirements.

Effective Sulfide Source – Rapidly releases sulfide ions and reacts readily with acids, making it a reliable reagent for metal treatment, tanning, flotation, and wastewater treatment applications.

Stable Industrial-Grade Material – Hygroscopic but structurally stable under proper storage conditions, ensuring consistent performance in controlled industrial environments.

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Product Details

Product Description of Sodium Hydrosulfide (CAS No. 16721-80-5)

Sodium Hydrosulfide is a sulfide compound that appears as colorless crystals in its pure state. In industrial grades, it is commonly supplied as light gray or pale yellow blocks, granules, or powders due to the presence of trace impurities. The material is hygroscopic and releases a characteristic hydrogen sulfide odor.

When dissolved in water, Sodium Hydrosulfide forms a strongly alkaline solution and readily reacts with acids, producing hydrogen sulfide gas. Proper handling and storage are therefore required to ensure safe use in industrial applications.

Sodium Hydrosulfide CAS#16721-80-5

Parameters

Melting point	55°C
density	1,79 g/cm3
RTECS	WE1900000
Fp	90°C
solubility	soluble in H2O, EtOh, ethyl ether
form	Solid
color	Off-white
Odor	Rotten eggs odor
Water Solubility	620 g/L (20 ºC)
Sensitive	Moisture Sensitive & Hygroscopic
Stability:	Stable, but hygroscopic. Flammable solid. May ignite in air.
CAS DataBase Reference	16721-80-5(CAS DataBase Reference)
EPA Substance Registry System	Sodium hydrosulfide (16721-80-5)

Safety Information

Hazard Codes	C,F
Risk Statements	31-34
Safety Statements	25-36/37/39-45-50A
RIDADR	2318
TSCA	Yes
HazardClass	4.2
PackingGroup	II
Hazardous Substances Data	16721-80-5(Hazardous Substances Data)

Product Application of Sodium Hydrosulfide (CAS No. 16721-80-5)

Sodium Hydrosulfide is widely used in paper pulping, dye manufacturing, and the desulfurization of rayon and cellophane fibers. In the textile, paper, pulp, and dyestuff industries, it serves as a bleaching and reducing agent to improve product quality.

In the leather industry, it is applied for unhairing hides during tanning processes, while in mineral processing it functions as a flotation reagent for copper ore beneficiation. It is also an important intermediate in organic synthesis and a key raw material for the production of ammonium sulfate and ethanethiol.

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Sodium Hydrosulfide CAS#16721-80-5