97855-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 97855-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,8,5 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 97855-21:
(7*9)+(6*7)+(5*8)+(4*5)+(3*5)+(2*2)+(1*1)=185
185 % 10 = 5
So 97855-21-5 is a valid CAS Registry Number.