1308-31-2 Usage
Chemical Properties
Iron-black to brownish-black color,
dark-brown streak, metallic to submetallic luster.
Mohs hardness 5.5.
Uses
Only commercial source of chromium and its
compounds.
Definition
A natural oxide of ferrous iron and chromium, sometimes with magnesium and aluminum present. Usually occurs in magnesium and iron-rich igneous
rocks.
Hazard
A confirmed carcinogen.
Safety Profile
Confirmed human
carcinogen during ore processing. Human
mutation data reported. See also
CHROMIUM COMPOUNDS and IRON.
Check Digit Verification of cas no
The CAS Registry Mumber 1308-31-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,0 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1308-31:
(6*1)+(5*3)+(4*0)+(3*8)+(2*3)+(1*1)=52
52 % 10 = 2
So 1308-31-2 is a valid CAS Registry Number.