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Potassium Structure

Potassium

Product NamePotassium

CAS7440-09-7

CBNumberCB9251331

MFK

MW39.1

EINECS231-119-8

MDL NumberMFCD00133776

MOL File7440-09-7.mol

MSDS FileSDS

Chemical Properties

Melting point 64 °C (lit.)
Boiling point 760 °C (lit.)
Density  0.86 g/mL at 25 °C (lit.)
vapor pressure  0.09 mm Hg ( 260 °C)
refractive index  n20/D 1.334
storage temp.  2-8°C
solubility  H2O: soluble
form  rod
color  Silver/gray
Specific Gravity 0.86
Odor Odorless
PH 5.0 (H2O, 20°C)
Resistivity 6.1 μΩ-cm, 20°C
Water Solubility  reacts
Sensitive  Air & Moisture Sensitive
Exposure limits ACGIH: TWA 2 ppm; STEL 4 ppm
OSHA: TWA 2 ppm(5 mg/m3)
NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
Stability Stable. Moisture and air-sensitive. Spontaneously combustible through the generation and ignition of hydrogen. Reacts violently with water and acids, alcohols, carbon monoxide. Store under oil.
CAS DataBase Reference 7440-09-7(CAS DataBase Reference)
NIST Chemistry Reference Potassium(7440-09-7)
EPA Substance Registry System Potassium (7440-09-7)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H260-H314
Precautionary statements P223-P231+P232-P260-P280-P303+P361+P353-P305+P351+P338
Hazard Codes  F,C,Xi,T
Risk Statements  14/15-34-36/38-23/24/25
Safety Statements  8-43-45-5B-5*-36/37/39-26-5-27
RIDADR  UN 2257 4.3/PG 1
WGK Germany  2
RTECS  TS8050000
8
Autoignition Temperature 25 °C or below in air or oxygen
TSCA  Yes
HS Code  2827 39 85
HazardClass  4.3
PackingGroup  I
Hazardous Substances Data 7440-09-7(Hazardous Substances Data)
Toxicity Ignites in air and reacts explosively with water; highly corrosive to the skin and eyes. Potassium reacts with the moisture on skin and other tissues to form highly corrosive potassium hydroxide. Contact of metallic potassium with the skin, eyes, or mucous membranes causes severe burns; thermal burns may also occur due to ignition of the metal and liberated hydrogen.
NFPA 704:
3
3 2

Potassium Price

Potassium Chemical Properties,Usage,Production

Potassium synthesis