Methane (CH4)
Specifications
- CAS No.: 74-82-8
- UN No.: 1971
- EINECS No.: 200-812-7
- Molecular Weight: 16.043 g/mol
- Appearance: Colorless, odorless
- Melting Point: -182.5 ℃
- Boiling Point: -161.5 ℃
- Density: 0.717g/L
- Hazard Class (DOT): 2.1
- Label: Flammable gas
High-purity methane (CH₄) gas for fuel calibration, semiconductor manufacturing, and chemical synthesis.
High-purity methane (CH₄) gas for fuel calibration, semiconductor manufacturing, and chemical synthesis.
Methane is a colorless, odorless, flammable gas under standard conditions. As the simplest alkane, it is highly insoluble in water and remains non-reactive with strong oxidizing agents, acids, or bases. Methane serves as a standard fuel for calorific value testing, a calibration gas for combustible gas detectors, and a carbon source for solar cell manufacturing and chemical vapor deposition of amorphous silicon films. It is also widely used in producing ammonia, urea, methanol, hydrogen, acetylene, and chlorinated methanes. High-purity electronic grade methane is essential for semiconductor processes, typically transported as a liquefied compressed gas.
Global Shipping & Export Compliance
China offers competitive pricing, large-scale production capacity, and a mature supply chain for industrial and electronic gases.
- Integrated gas + cylinder + export packaging systems
- Competitive industrial gas pricing
- Large-scale production capacity
- Stable long-term supply availability
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 Methane 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 Methane 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
Packaging
| Gas Cylinder Specifications | Contents | Pressure | ||
| Cylinder Capacity | Cylinder Valve | Volume | Bar | PSIG |
| 40L | CGA350 | 5m³ | 150 | 2175 |
| 47L | CGA350 | 7m³ | 150 | 2175 |
| 50L | CGA350 | 10m³ | 200 | 2900 |
Industrial Grade Methane (CH4) 99.9%
| Purity | 99.9% |
| Hydrogen (H2) | ≤ 50ppm |
| Oxygen (O2) +Argon Gas (Ar) | ≤ 50ppm |
| Nitrogen (N2) | ≤ 250ppm |
| Ethane (C2H6) | ≤ 600ppm |
| Moisture | ≤ 50ppm |
Industrial Grade Methane (CH4) 99.99%
| Purity | 99.99% |
| Hydrogen (H2) | ≤ 10ppm |
| Oxygen (O2) +Argon Gas (Ar) | ≤ 10ppm |
| Nitrogen (N2) | ≤ 35ppm |
| Ethane (C2H6) | ≤ 25ppm |
| Moisture | ≤ 15ppm |
Electronic Grade Methane (CH4) 99.999%
| Purity | 99.999% |
| Hydrogen (H2) | ＜0.5ppm |
| Oxygen (O2) +Argon Gas (Ar) | ＜1ppm |
| Nitrogen (N2) | ＜4ppm |
| Carbon Dioxide (CO2) | ＜0.5ppm |
| Ethane (C2H6) | ＜4ppm |
| Hydrogen Sulfide (H2S) | ＜0.1ppm |
| Moisture | ≤3ppm |
Frequently Asked Questions
