97997-94-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 97997-94-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,9,9 and 7 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 97997-94:
(7*9)+(6*7)+(5*9)+(4*9)+(3*7)+(2*9)+(1*4)=229
229 % 10 = 9
So 97997-94-9 is a valid CAS Registry Number.