Ammonia

Ammonia
Orúkọ IUPAC Ammonia Azane (see text)
Àwọn orúkọ mìíràn	Ammonia Hydrogen nitride Spirit of Hartshorn Nitro-Sil Vaporole
Identifiers
CAS number	7664-41-7
PubChem	222
EC number	231-635-3
nọ́mbà UN	1005 (anhydrous) 2672, 2073, 3318 (solutions)
nọ́mbà RTECS	BO0875000 (anhydrous) BQ9625000 (solutions)
SMILES	N
InChI	1/H3N/h1H3
InChI key	QGZKDVFQNNGYKY-UHFFFAOYAF
ChemSpider ID	217
Properties
Molecular formula	NH3
Molar mass	17.031 g/mol
Appearance	Colorless gas with strong pungent odour
Density	0.86 kg/m3 (1.013 bar at boiling point) 0.73 kg/m3 (1.013 bar at 15 °C) 681.9 kg/m3 at −33.3 °C (liquid) 820 kg/m3 at -80 °C (crystal solid) 817 kg/m3 at -80 °C (transparent solid)
Ojúàmì ìyọ́	−77.73 °C (195.42 K)
Ojúàmì ìhó	−33.34 °C (239.81 K)
Solubility in water	1176 g/100 mL (0 °C) 702 g/100 mL (20 °C) 88 g/100 mL (100 °C)
Acidity (pKa)	38 (H2O) 41 (DMSO)
Basicity (pKb)	4.75
Structure
Molecular shape	Trigonal pyramid
Dipole moment	1.42 D
Hazards
EU Index	007-001-00-5 (anhydrous) 007-001-01-2 (solutions)
EU classification	Toxic (T) Corrosive (C) Dangerous for the environment (N)
R-phrases	Àdàkọ:R10, Àdàkọ:R23, R34, Àdàkọ:R50
S-phrases	(S1/2), Àdàkọ:S9, S16, Àdàkọ:S26, Àdàkọ:S36/37/39, S45, Àdàkọ:S61
NFPA 704	1 3 0
Flash point	flammable gas (see text)
Autoignition temperature	651 °C
Explosive limits	15–28%
U.S. Permissible exposure limit (PEL)	50 ppm (25 ppm ACGIH- TLV; 35 ppm STEL)
Related compounds
Other cations	Phosphine Arsine Stibine
Related nitrogen hydrides	Hydrazine Hydrazoic acid
Related compounds	Ammonium hydroxide
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ammonia