97661-33-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 97661-33-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,6,6 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 97661-33:
(7*9)+(6*7)+(5*6)+(4*6)+(3*1)+(2*3)+(1*3)=171
171 % 10 = 1
So 97661-33-1 is a valid CAS Registry Number.