Sodium hydrosulfide
General Product Information
| Article | Sodium hydrosulfide |
| Synonyms | Sodium bisulfide, Sodium sulfhydrate, Sodium hydrogen sulfide |
| CAS No. | 16721-80-5 |
| EEG No. | – |
| EINECS No. | 240-778-0 |
| IMO | 8 (c) |
| Tariff Code | 28301000 |
| UN No. | 2949 |
| VLG/ADR | Class 8, Packing Group ii |
Description
Sodium hydrosulfide is an inorganic compound. The product is Hygroscopic and has a characteristic sulfurous odor. Sodium hydrosulfide is an important industrial chemical used because of its strong reducing properties and its ability to provide sulfide ions. It is widely used in various industrial processes ranging from mining to Water Treatment.
Characteristics
- Odor: Characteristic sulfurous odor of rotten eggs.
- Hygroscopic: Yes.
- Color: White to light yellow.
- Grade: Technical.
- Solubility: Highly soluble in water.
- Shape: crystalline powder or granule.
Physical & Chemical Properties
| Chemical Structure | NaHS |
| Molar Weight | 56.06 g/mol |
| Melting Point | Approx. 350 °C (decomposes). |
| Boiling Point | – |
| Density | 1.39 g/cm³ |
| Refractive Index | – |
| pH | Approx. 12-13 |
Interessing Links
- CAS Common Chemistry – Sodium hydrosulfide
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Sodium Hydrosulfide – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Sodium hydrosulfide
Applications
1. Mining
Used at the flotation process for separating metals and ores, as well as for precipitation of heavy metals.
2. Chemical Industry
As a reducing agent and intermediate at the production of dyes, pesticides and rubber chemicals.
3. Textile Industry
Applied at removing impurities and processing textile fibers.
4. Pulp & Paper Industry
Used for bleaching and desulfurization of pulp.
5. Water Treatment
For removal of heavy metals by precipitation and neutralization of wastewater.