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Pure Gases

Ammonia (NH)₃

Description:

Electronic grade ammonia is used as an etching gas in semiconductor manufacturing. It also can be mixed with silane to make silicon nitride. Anhydrous ammonia is used in pharmaceutical production, metal treating, organic synthesis and as a refrigerant gas.

Properties:

	Molecular Weight:	17.031
	Specific Volume:	22.6 CF/lb
	Flammable Limits:	15 to 28% in Air
	CGA Valve:	240
	DOT Name:	Ammonia, Anhydrous, Liquefied
	UN No.:	UN1005
	DOT Class:	2.2
	DOT Label:	Nonflammable Gas - Inhalation Hazard
	CAS Registry:	7664-41-7

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Materials Compatibility

Physical Properties

Explosive Limits

Threshold Limit Values

Cylinder Specifications & Conversion Chart

Airgas Non-Refillable Cylinders

Quality and Compliance

Technical Resources

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