97764-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 97764-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,7,6 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 97764-71:
(7*9)+(6*7)+(5*7)+(4*6)+(3*4)+(2*7)+(1*1)=191
191 % 10 = 1
So 97764-71-1 is a valid CAS Registry Number.