Ammonia

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Ammonia
Ammonia-dimensions-from-Greenwood&Earnshaw-2D.png
Ammonia-3D-balls-A.png
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
InChI
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)[1]
820 kg/m3 at -80 °C (crystal solid)
817 kg/m3 at -80 °C (transparent solid)[2]
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
NFPA 704.svg
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
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ammonia



Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. "Pure ammonia". http://www.rmtech.net/Anhydrous%20Ammonia.htm. Retrieved 2009-07-07. 
  2. Blum, Alexander (1975). "On crystalline character of transparent solid ammonia". Radiation Effects and Defects in Solids 24: 277. doi:10.1080/00337577508240819.