Industrial Grade Sodium Hydrosulfide (NaHS) CAS 16721-80-5 Sulfur-Containing Inorganic Chemical & Reducing Agent

Sodium Hydrosulfide (Common Name: NaHS, CAS:16721-80-5,EINECS:240-778-0, HS Code:2830109000) is a versatile inorganic sulfur compound produced by half-neutralization of hydrogen sulfide with sodium hydroxide. Our industrial grade products comply with GB/T 23937-2020 and international quality standards. It appears as yellow to orange flakes (70-72% solid) or colorless to light yellow aqueous solution (35-60% liquid), featuring strong reducing properties and characteristic rotten egg odor (due to H₂S release). With excellent sulfur-donating ability, it is widely used in leather, mining, pulp & paper, dyeing and water treatment industries.

Applications
Leather Industry (Core Application)
Efficient dehairing agent: Breaks disulfide bonds in keratin for gentle hair removal without mechanical damage
Auxiliary in tanning process: Improves leather softness and grain uniformity
Reducing agent for leather dyeing: Enhances color fastness and brightness
Used in both beamhouse operations and finishing stages
Mining Industry (Key Application)
Flotation agent for sulfide ores: Selectively activates mineral surfaces to improve metal recovery rates
Depressant for copper-molybdenum separation in mineral processing
Precipitant for heavy metal recovery from ore slurries
Widely applied in copper, lead, zinc and molybdenum mining operations
Pulp & Paper Industry
Critical additive in Kraft pulping process: Increases sulfidity to enhance lignin removal efficiency
Improves pulp strength and brightness while reducing chemical consumption
Bleaching agent for mechanical pulp and recycled paper
Controls sulfidity levels in digester operations
Textile & Dye Industry
Reducing agent for sulfur dyeing of cellulosic fibers (cotton, viscose)
Desulfurizing agent for rayon and cellophane production
Raw material for sulfur dye and organic intermediate synthesis
Color fixing agent in textile printing processes
Other Industrial Applications
Water Treatment: Reduces hexavalent chromium (Cr⁶⁺) to trivalent chromium (Cr³⁺) for precipitation removal
Chemical Synthesis: Precursor for thiourea, ethanethiol and other sulfur-containing compounds
Rubber Industry: Vulcanization accelerator and sulfur donor in rubber manufacturing
Wastewater Treatment: Neutralizes oxidizing agents and precipitates heavy metals

Product Advantages
✅ High sulfur activity: Excellent reducing and sulfur-donating properties for efficient industrial processes
✅ Dual form supply: 70% flakes and 35-60% liquid solutions available for different application needs
✅ Cost-effective: High efficiency at low dosage reduces overall production costs
✅ Compliant with standards: Meets GB/T 23937-2020 and international industrial requirements
✅ Wide compatibility: Works effectively with other industrial chemicals and processes
✅ Proven performance: Reliable results in leather dehairing, mining flotation and pulp processing

Packaging & Storage
70% flake product: 25kg woven bags with inner PE liner, 900kg bulk bags or 1000kg FIBC containers. 35-60% liquid product: 200kg plastic drums, 1000kg IBC tanks or ISO tank containers. Store in a cool, dry and well-ventilated warehouse away from heat sources and open flames. Keep containers tightly sealed to prevent H₂S gas release and moisture absorption. Avoid contact with acids, oxidizing agents, and food materials. Shelf life is 12 months for flakes and 6 months for liquid under proper storage conditions.
Safety Information
Classified as hazardous goods (UN 2318, Class 4.2: Spontaneously Combustible Substances) for transportation. The product is corrosive and releases toxic H₂S gas when in contact with acids or water. It may cause severe irritation to skin, eyes and respiratory tract. Wear chemical-resistant gloves, goggles and self-contained breathing apparatus during handling. In case of contact, rinse the affected area with plenty of clean water immediately and seek medical attention if irritation persists. Complete MSDS and relevant qualification certificates can be provided upon request.

With 15 years of experience in chemical foreign trade, we offer the following core strengths to support your procurement needs:
1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
5.6 packaging options with customizable logos to minimize product loss during transportation.
6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.
Please share your purchase volume, target market, and other requirements, and we will tailor a customized solution for you!