639516-87-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639516-87-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,5,1 and 6 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 639516-87:
(8*6)+(7*3)+(6*9)+(5*5)+(4*1)+(3*6)+(2*8)+(1*7)=193
193 % 10 = 3
So 639516-87-3 is a valid CAS Registry Number.