1616377-81-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1616377-81-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,1,6,3,7 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1616377-81:
(9*1)+(8*6)+(7*1)+(6*6)+(5*3)+(4*7)+(3*7)+(2*8)+(1*1)=181
181 % 10 = 1
So 1616377-81-1 is a valid CAS Registry Number.