[Standard]: GB6819-1996

[Molecular formula]: C₂H₂

[Molecular weight]: 26.04

[Properties]:

Quality index
Item	Value
purity %(V/V)	98.0
phosphine, hydrogen sulphide	10% no color change in 10% silver nitrate test paper

[Properties]: Colorless, explosive gas.

[Uses]: THe material, fuel, metal welding and cut.

[Packing & storage]: far away from heat and electrical equipment, avoid insolation, no fall, no used in lying condition.