23821-88-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23821-88-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,2 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 23821-88:
(7*2)+(6*3)+(5*8)+(4*2)+(3*1)+(2*8)+(1*8)=107
107 % 10 = 7
So 23821-88-7 is a valid CAS Registry Number.