Sodium Hydrosulfide CAS#16721-80-5

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


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


Effective Sulfide SourceRapidly 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 MaterialHygroscopic but structurally stable under proper storage conditions, ensuring consistent performance in controlled industrial environments.


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Product Description

Product Description of Sodium Hydrosulfide CAS#16721-80-5

Sodium Hydrosulfide is a sulfide compound. In pure form, it presents as colorless crystals. Industrial-grade products are usually light gray or pale yellow lumps, granules or powders due to trace impurities. It is hygroscopic and emits a typical hydrogen sulfide odor. When dissolved in water, it forms a strongly alkaline solution and readily reacts with acids to release hydrogen sulfide gas. Correct handling and proper storage are essential to ensure safe industrial application.


Product Application of Sodium Hydrosulfide CAS#16721-80-5

Sodium Hydrosulfide is widely used in paper pulping, dye production, and desulfurization of rayon and cellophane fibers. In textile, paper, pulp and dyestuff industries, it acts as a bleaching and reducing agent to improve product quality. In the leather industry, it is used for hide unhairing in tanning processes. In mineral processing, it serves as a flotation reagent for copper ore beneficiation. It is also an important intermediate in organic synthesis and a key raw material for manufacturing ammonium sulfate and ethanethiol.

Product Information

Parameters


Melting point55°C
density1,79 g/cm3
RTECSWE1900000
Fp90°C
solubilitysoluble in H2O, EtOh, ethyl ether
formSolid
colorOff-white
OdorRotten eggs odor
Water Solubility620 g/L (20 ºC)
SensitiveMoisture Sensitive & Hygroscopic
Stability:Stable, but hygroscopic. Flammable solid. May ignite in air.
CAS DataBase Reference16721-80-5(CAS DataBase Reference)
EPA Substance Registry SystemSodium hydrosulfide (16721-80-5)


Safety Information


Hazard CodesC,F
Risk Statements31-34
Safety Statements25-36/37/39-45-50A
RIDADR2318
TSCAYes
HazardClass4.2
PackingGroupII
Hazardous Substances Data16721-80-5(Hazardous Substances Data)


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Q1: Is Huafeng Chemical a manufacturer or a trader?
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Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

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