21552-32-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21552-32-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,5 and 2 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21552-32:
(7*2)+(6*1)+(5*5)+(4*5)+(3*2)+(2*3)+(1*2)=79
79 % 10 = 9
So 21552-32-9 is a valid CAS Registry Number.