1421518-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1421518-21-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,1,5,1 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1421518-21:
(9*1)+(8*4)+(7*2)+(6*1)+(5*5)+(4*1)+(3*8)+(2*2)+(1*1)=119
119 % 10 = 9
So 1421518-21-9 is a valid CAS Registry Number.