Basic information Introduction Chemical Properties Physical Properties Reactions Production Toxicity Safety Related Supplier
Chromium Structure


Chemical Properties

Melting point 1857 °C (lit.)
Boiling point 2672 °C (lit.)
Density  7.14 g/mL at 25 °C (lit.)
Flash point 50 °F
storage temp.  no restrictions.
solubility  reacts with dilute acid solutions
form  powder
Specific Gravity 7.2
color  Silver-gray
PH <1 (H2O, 20°C)
Odor Odorless
Resistivity 12.7 μΩ-cm, 20°C
Water Solubility  Insoluble in water.
Merck  13,2252
Exposure limits TLV-TWA: chromium metal 0.5 mg/m3 (ACGIH and MSHA), 1 mg/m3 (OSHA); Cr(II) and Cr(III) compounds 0.5 mg/m3 (ACGIH); Cr(VI) compounds, water soluble and certain water insoluble, 0.05 mg/m3 (ACGIH).
Stability Stable. Incompatible with carbonates, strong bases, mineral acids, lithium, sulfur dioxide, strong acids.
CAS DataBase Reference 7440-47-3(CAS DataBase Reference)
IARC 3 (Vol. Sup 7, 49) 1990
NIST Chemistry Reference Chromium(7440-47-3)
EPA Substance Registry System Chromium (7440-47-3)

Safety Information

Hazard Codes  F,C,Xn,Xi
Risk Statements  11-20/21/22-34-40-23-67-36
Safety Statements  16-26-36/37/39-45-36/37-27
RIDADR  UN 2924 3/PG 2
WGK Germany  3
RTECS  GB4200000
Autoignition Temperature 580°C
HS Code  8112 21 90
HazardClass  4.1
PackingGroup  III
Hazardous Substances Data 7440-47-3(Hazardous Substances Data)
Toxicity Elemental chromium and certain chromium compounds have been designated as carcinogens, hazardous substances, hazardous waste constituents, and priority toxic pollutants. Some of those compounds designated as hazardous are chromic acetate, chromic acid, chromic sulfate, and chromous chloride. Although chromium in the 6+ state is regarded as being the most carcinogenic, there are 6+ compounds that appear to be non-carcinogenic. In addition to their possible carcinogenicity, chromium compounds may have local allergic effects leading to dermatitis. Systemically, 6+ chromium compounds are irritants to the respiratory system and may give rise to pulmonary edema.
IDLA 250 mg Cr/m3


Usage And Synthesis

Chromium Supplier

Chromium manufacturers