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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.
LogP -1.380 (est)
CAS DataBase Reference 1310-58-3(CAS DataBase Reference)
NIST Chemistry Reference Potassium hydroxide(1310-58-3)
EPA Substance Registry System Potassium hydroxide (1310-58-3)

Safety Information

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
Autoignition Temperature 425 °C (ethanol)
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)


Usage And Synthesis

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