1621399-62-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1621399-62-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,3,9 and 9 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1621399-62:
(9*1)+(8*6)+(7*2)+(6*1)+(5*3)+(4*9)+(3*9)+(2*6)+(1*2)=169
169 % 10 = 9
So 1621399-62-9 is a valid CAS Registry Number.