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Aqueous Ammonia Structure

Aqueous Ammonia

Chemical Properties

Melting point -77°C
Boiling point 36°C
Density  0.91 g/mL at 20 °C
vapor density  1.2 (vs air)
vapor pressure  115 mmHg at 20 °C for 29% solution
storage temp.  2-8°C
solubility  Water (Soluble)
form  Liquid, Single Sub-Boiling Quartz Distillation
pka 9.3(at 25℃)
color  Colorless
Specific Gravity approximate 0.96 (10%, 15℃)
PH 10.09(1 mM solution);10.61(10 mM solution);11.12(100 mM solution);
Odor Strong pungent ammonia odor detectable at 17 ppm
explosive limit 27%
Water Solubility  Miscible with water.
λmax λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
Merck  14,494
BRN  3587154
Stability Stable. Incompatible with copper, copper alloys, acids, galvanised iron, zinc, aluminium, bronze, dimethyl sulphate, mercury, alkali metals.
InChIKey VHUUQVKOLVNVRT-UHFFFAOYSA-N
CAS DataBase Reference 1336-21-6(CAS DataBase Reference)
FDA 21 CFR 184.1139; 582.1139; 310.545
Substances Added to Food (formerly EAFUS) AMMONIUM HYDROXIDE
SCOGS (Select Committee on GRAS Substances) Ammonium hydroxide
EWG's Food Scores 2-3
EPA Substance Registry System Ammonium hydroxide (1336-21-6)
Cosmetics Info Ammonium Hydroxide

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H314-H335-H410
Precautionary statements P261-P271-P273-P280-P303+P361+P353-P305+P351+P338
Hazard Codes  C,N
Risk Statements  34-50-22
Safety Statements  26-36/37/39-45-61
RIDADR  UN 2672 8/PG 3
WGK Germany  2
RTECS  BQ9625000
34
Autoignition Temperature 690 °C (for ammonia)
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  28142000
Hazardous Substances Data 1336-21-6(Hazardous Substances Data)
Toxicity LD50 oral (rat) 350 mg/kg
PEL (OSHA) 35 ppm (27 mg/m3)
TLV-TWA (ACGIH) 25 ppm (17 mg/m3)
STEL (ACGIH) 35 ppm (27 mg/m3)
NFPA 704:
0
3 0

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