202121-51-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 202121-51-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,1,2 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 202121-51:
(8*2)+(7*0)+(6*2)+(5*1)+(4*2)+(3*1)+(2*5)+(1*1)=55
55 % 10 = 5
So 202121-51-5 is a valid CAS Registry Number.