7021-81-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7021-81-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,0,2 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7021-81:
(6*7)+(5*0)+(4*2)+(3*1)+(2*8)+(1*1)=70
70 % 10 = 0
So 7021-81-0 is a valid CAS Registry Number.