157197-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157197-91-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,1,9 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157197-91:
(8*1)+(7*5)+(6*7)+(5*1)+(4*9)+(3*7)+(2*9)+(1*1)=166
166 % 10 = 6
So 157197-91-6 is a valid CAS Registry Number.