1620107-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1620107-81-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,1,0 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1620107-81:
(9*1)+(8*6)+(7*2)+(6*0)+(5*1)+(4*0)+(3*7)+(2*8)+(1*1)=114
114 % 10 = 4
So 1620107-81-4 is a valid CAS Registry Number.