21903-55-9 Usage
Chemical class
Benzene and substituted derivatives
Composition
Benzene ring with two chlorine atoms at positions 2 and 3, and two bromomethyl groups at position 1 and 4
Common uses
Synthesis of various organic compounds, building block in the production of other chemical compounds
Toxicity
Toxic, can cause irritation to skin, eyes, and respiratory system
Environmental impact
Potential to cause environmental harm if not properly managed and disposed of
Safety precautions
Handle with care, use appropriate protective equipment, and follow proper disposal procedures
Check Digit Verification of cas no
The CAS Registry Mumber 21903-55-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,0 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21903-55:
(7*2)+(6*1)+(5*9)+(4*0)+(3*3)+(2*5)+(1*5)=89
89 % 10 = 9
So 21903-55-9 is a valid CAS Registry Number.
