1, hydrogen
Hydrogen (H2) is a colorless, odorless and tasteless gas. It is a colorless liquid at high pressure and low temperature, and slightly soluble in water. It is extremely flammable and can explode violently when mixed with air in case of fire. If it is mixed with chlorine, it can be naturally fried under sunlight; It can explode when mixed with fluorine in the dark; Hydrogen contained in a steel cylinder can also explode when heated.
The explosion limit of hydrogen is 4.0% ~ 75.6% (volume concentration).
2. Methane
Methane is a colorless and odorless gas with a boiling point of-16 1.4℃, which is lighter than air. It is a flammable gas that is extremely insoluble in water and a simple organic compound. A mixture of methane and air in a proper proportion will explode when it meets sparks. The chemical properties of methane are quite stable, and it generally does not react with strong acids, strong bases or strong oxidants (such as KMnO4).
Upper explosive limit% (v/v):15.4 and lower explosive limit% (v/v): 5.0.
3. Ethane
Ethane is insoluble in water, slightly soluble in ethanol and acetone, and soluble in benzene. When it is mixed with air, it can form an explosive mixture, which is in danger of burning and explosion when it meets heat sources and open flames. Contact with fluorine, chlorine, etc. will produce violent chemical reactions. Mainly used for making ethylene, vinyl chloride, chloroethane, refrigerants, etc.
Upper explosive limit% (v/v):16.0 and lower explosive limit% (v/v): 3.0.
4. Propane
Propane is a colorless gas, slightly soluble in water, soluble in ethanol and ether, and used in organic synthesis. Mixing with air can form explosive mixture, which is in danger of burning and explosion when it meets heat source and open flame. Contact with oxidant and react violently. Gas is heavier than air, which can spread to a considerable distance at a lower place, and will catch fire when it meets a fire source.
Upper explosive limit% (v/v): 9.5 and lower explosive limit% (v/v): 2.1
5. Butane
Butane is a flammable, colorless and easily liquefied gas. Insoluble in water, soluble in ethanol, ether, chloroform and other hydrocarbons. Forming an explosive mixture with air.
The explosion limit is 19%~84%