202131-25-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 202131-25-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,1,3 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 202131-25:
(8*2)+(7*0)+(6*2)+(5*1)+(4*3)+(3*1)+(2*2)+(1*5)=57
57 % 10 = 7
So 202131-25-7 is a valid CAS Registry Number.