97731-99-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 97731-99-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,7,3 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 97731-99:
(7*9)+(6*7)+(5*7)+(4*3)+(3*1)+(2*9)+(1*9)=182
182 % 10 = 2
So 97731-99-2 is a valid CAS Registry Number.