Hazard classDanger — Gas under pressure, Toxic, Corrosive, Environmental hazard
PictogramsGas under pressureToxicCorrosiveEnvironmental hazard
H-statements- H221 Flammable gas
- H331 Toxic if inhaled
- H314 Causes severe skin burns and eye damage
- H400 Very toxic to aquatic life
Common uses (US EPA CDR)Soil amendments (fertilizers)Reducing agentIntermediateProcessing aids not otherwise specifiedFuel agentsRefrigerants
Workplace exposure limitsNIOSH REL TWA 25 ppm (18 mg/m3)
OSHA PEL TWA 50 ppm (35 mg/m3) ST 35 ppm (27 mg/m3)
IDLH 300 ppmOccupational exposure limits — NIOSH Pocket Guide.
Synonymsammonia · azane · Ammonia gas · Nitro-sil · Ammonia anhydrous · Ammonia, anhydrous · Anhydrous ammonia · Ammoniak
Molecular weight17.031 g/mol
Data sourceHarmonised classification ECHA — EU CLP Annex VILegally binding EU classification adopted by ECHA under CLP Annex VI — the highest-confidence GHS source.