39931-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 39931-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,9,3 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 39931-57:
(7*3)+(6*9)+(5*9)+(4*3)+(3*1)+(2*5)+(1*7)=152
152 % 10 = 2
So 39931-57-2 is a valid CAS Registry Number.