1621421-76-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1621421-76-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,4,2 and 1 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1621421-76:
(9*1)+(8*6)+(7*2)+(6*1)+(5*4)+(4*2)+(3*1)+(2*7)+(1*6)=128
128 % 10 = 8
So 1621421-76-8 is a valid CAS Registry Number.