21152-98-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21152-98-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,5 and 2 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21152-98:
(7*2)+(6*1)+(5*1)+(4*5)+(3*2)+(2*9)+(1*8)=77
77 % 10 = 7
So 21152-98-7 is a valid CAS Registry Number.