21081-52-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21081-52-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,8 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21081-52:
(7*2)+(6*1)+(5*0)+(4*8)+(3*1)+(2*5)+(1*2)=67
67 % 10 = 7
So 21081-52-7 is a valid CAS Registry Number.