21813-65-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21813-65-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,1 and 3 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21813-65:
(7*2)+(6*1)+(5*8)+(4*1)+(3*3)+(2*6)+(1*5)=90
90 % 10 = 0
So 21813-65-0 is a valid CAS Registry Number.