Hydrogen Sulfide (H2S)
Specifications
- CAS No.: 7803-62-5
- UN No.: 2203
- EINECS No.: 232-263-4
- Molecular Weight: 32.117 g/molAppearance: colorless, garlic-like odor
- Melting Point: -185 ℃
- Boiling Point: -112 ℃
- Density: 1.34kg/m³
- Hazard Class (DOT): 2.3 & 2.1
- Label: Toxic gas, Flammable gas
High-purity hydrogen sulfide (H₂S) gas supplied from China for chemical synthesis, semiconductor manufacturing, and metal processing.
High-purity hydrogen sulfide (H₂S) gas for organic synthesis, semiconductor doping, sulfide preparation, and catalyst regeneration.
Hydrogen sulfide is a colorless, flammable gas with a characteristic pungent odor of rotten eggs at low concentrations. As a weak diprotic acid, it is soluble in water, alcohols, and petroleum solvents, forming hydrosulfuric acid in aqueous solution. Hydrogen sulfide serves as an essential chemical raw material for manufacturing synthetic phosphors, electroluminescent materials, photoconductors, and photoelectric exposure meters. It is widely used as a reducing agent in organic synthesis, metal refining, pesticide and pharmaceutical production, and catalyst regeneration. High-purity electronic grade hydrogen sulfide is also critical for semiconductor applications, infrared optical materials, and inorganic sulfide preparation, typically transported as a liquefied compressed gas.
Global Shipping & Export Compliance
Hydrogen sulfide (UN 2203) is classified as a toxic and flammable compressed gas and must be handled under strict hazardous materials regulations.
- Sea freight (FCL / LCL) – standard export method
- Air freight – limited availability (regulatory controlled)
Required Export Documents
- Material Safety Data Sheet (MSDS)
- Certificate of Analysis (COA)
- Dangerous Goods Declaration (DGD)
- UN-certified cylinder documentation
- Commercial invoice & packing list
How to Order Hydrogen Sulfide Gas from China
- Send technical requirements (purity, pressure, application)
- Receive quotation (EXW / FOB / CIF options)
- Confirm cylinder specification & compliance
- Review COA, MSDS, and certification documents
- Production, filling, and quality inspection
- Hazardous goods shipping arrangement
- Delivery and final inspection at destination
Common Mistakes When Buying Hydrogen Sulfide Gas
- Choosing suppliers only based on lowest price
- Ignoring cylinder certification and pressure rating
- Not verifying moisture and impurity levels
- Skipping third-party inspection before shipment
- Overlooking export documentation compliance
- Underestimating safety requirements for toxic gas handling
Packaging
| Gas Cylinder Specifications | Contents | |
| Cylinder Capacity | Cylinder Valve | Weight |
| 40L | DISS632 | 10kg |
| 440L | DISS632 | 120kg |
Industrial Grade Hydrogen Sulfide (H2S) 99.5%
| Purity | 99.5% |
| Hydrogen (H2) | ≤ 0.02% |
| Carbon Dioxide (CO2) | ≤ 0.4% |
| Nitrogen (N2) | ≤ 0.01% |
| Propane (CH3CH2CH3) | ≤ 0.01% |
| Oxygen (O2) | ≤ 0.02% |
| Moisture | ≤ 50ppm |
Industrial Grade Hydrogen Sulfide (H2S) 99.9%
| Purity | 99.9% |
| Hydrogen (H2) | ≤ 0.02% |
| Carbon Dioxide (CO2) | ≤ 0.03% |
| Nitrogen (N2) | ≤ 0.03% |
| Propane (CH3CH2CH3) | ≤ 0.01% |
| Oxygen (O2) | ≤ 0.01% |
| Moisture | ≤ 20ppm |
Electronic Grade Hydrogen Sulfide (H2S) 99.99%
| Purity | 99.99% |
| Hydrogen (H2) | ≤ 4.64ppm |
| Oxygen (O2) | ≤ 2.72ppm |
| Nitrogen (N2) | ≤ 6.22ppm |
| Carbon Monoxide+Carbon Dioxide (CO2)+Methane (CH4) | ≤ 8.83ppm |
| Moisture | ≤ 6.30ppm |
| Others | ≤ 14.10ppm |
Frequently Asked Questions
