1621478-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1621478-71-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,4,7 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1621478-71:
(9*1)+(8*6)+(7*2)+(6*1)+(5*4)+(4*7)+(3*8)+(2*7)+(1*1)=164
164 % 10 = 4
So 1621478-71-4 is a valid CAS Registry Number.