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Potassium hydroxide  Structure

Potassium hydroxide

Chemical Properties

Melting point 361 °C (lit.)
Boiling point 1320°C
Density  1.450 g/mL at 20 °C
vapor pressure  1 mm Hg ( 719 °C)
refractive index  n20/D 1.421
Flash point 52 °F
storage temp.  Store at +5°C to +30°C.
solubility  H2O: 1 M at 20 °C, clear, colorless
form  powder
Specific Gravity 1.09
color  white
Odor Odorless
PH 10.98(1 mM solution);11.95(10 mM solution);12.88(100 mM solution);
explosive limit 3.5-15.0%(V) (ethanol)
Water Solubility  soluble
Sensitive  Air Sensitive & Hygroscopic
Merck  14,7640
Exposure limits Ceiling in air 2 mg/m3 (ACGIH).
Dielectric constant 3.3(Ambient)
Stability Stable, but very hygroscopic. Dissolves exothermically in water. Incompatible with most metals, strong acids, acid chlorides, organic materials, zinc, aluminium, nitroalkanes, nitrobenzene, chlorine dioxide. Reacts vigorously with a wide variety of other materials. Readily absorbs water and carbon dioxide from the air.
InChIKey KWYUFKZDYYNOTN-UHFFFAOYSA-M
LogP -1.380 (est)
FDA 21 CFR 184.1631; 582.1631; 175.210; 177.2800
Substances Added to Food (formerly EAFUS) POTASSIUM HYDROXIDE
SCOGS (Select Committee on GRAS Substances) Potassium hydroxide
CAS DataBase Reference 1310-58-3(CAS DataBase Reference)
EWG's Food Scores 2-5
NCI Dictionary of Cancer Terms potassium hydroxide
FDA UNII WZH3C48M4T
NIST Chemistry Reference Potassium hydroxide(1310-58-3)
EPA Substance Registry System Potassium hydroxide (1310-58-3)
Cosmetics Info Potassium Hydroxide

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H290-H302-H314
Precautionary statements P234-P260-P280-P301+P312-P303+P361+P353-P305+P351+P338
Hazard Codes  C,F,T,Xi
Risk Statements  34-35-22-11-39/23/24/25-23/24/25-36/38-36/37-67-52/53
Safety Statements  7-16-36/37-45-36/37/39-26-61
RIDADR  UN 2924 3/PG 2
WGK Germany  1
RTECS  TT2100000
3
Autoignition Temperature 425 °C (ethanol)
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  28259090
Hazardous Substances Data 1310-58-3(Hazardous Substances Data)
Toxicity LD50 orally in rats: 1.23 g/kg (Smyth)
NFPA 704:
0
3 1

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