21552-30-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21552-30-7 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 0 respectively.
Calculate Digit Verification of CAS Registry Number 21552-30:
(7*2)+(6*1)+(5*5)+(4*5)+(3*2)+(2*3)+(1*0)=77
77 % 10 = 7
So 21552-30-7 is a valid CAS Registry Number.