91977-59-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91977-59-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,9,7 and 7 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91977-59:
(7*9)+(6*1)+(5*9)+(4*7)+(3*7)+(2*5)+(1*9)=182
182 % 10 = 2
So 91977-59-2 is a valid CAS Registry Number.