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Ammonia – Commercial Grade
Product
Specification
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| Properties |
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Molecular formula |
NH3 |
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Molar mass |
17.0306 g/mol |
| Appearance |
Colorless gas with strong pungent odor |
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Density |
0.6942[2] |
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Melting point |
-77.73 °C (195.42
K) |
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Boiling point |
-33.34 °C (239.81 K) |
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Solubility in
water |
89.9 g/100
mL at 0 °C |
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Basicity (pKb) |
4.75 (reaction with H2O) |
|
Refractive index (nD) |
εr |
| Structure |
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Molecular shape |
Trigonal pyramid |
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Dipole moment |
1.42
D |
| Hazards |
| Main
hazards |
Hazardous gas, caustic, corrosive |
|
NFPA 704 |
 |
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Risks |
Flammable,
Toxic by inhalation,
Causes burns,
Very toxic to
aquatic organisms |
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Safety |
Keep locked up and out of the reach of children
, Keep away from sources of ignition - No
smoking ,
Wear suitable
protective clothing, gloves and eye/face protection ,
In case of
accident or if you feel unwell seek medical advice immediately (show the
label where possible) ,
Avoid release
to the environment. Refer to special instructions/safety data sheet
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Flash point |
None |
Autoignition
temperature |
651 °C |
| Related compounds |
| Other
anions |
hydroxide (NH3.H2O) |
| Other
cautions |
Ammonium (NH4+) |
| Related |
chloride (NH4Cl) |
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Description |
| Ammonia is a colorless
gas with a characteristic pungent smell. It is
lighter than air, its density being 0.589 times that of
air. It is easily liquefied due to the strong hydrogen bonding between molecules; the
liquid boils at -33.3 °C, and solidifies at -77.7 °C to a white crystals.
Liquid ammonia possesses strong
ionizing powers reflecting its high
ε of 22. Liquid ammonia has a very high
standard enthalpy change of vaporization (23.35
water 40.65 kJ/mol,
methane 8.19 kJ/mol,
phosphine 14.6 kJ/mol) and can therefore be used in laboratories in non-insulated vessels without additional refrigeration. |
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International Chemical Safety Card |
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