139638-68-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139638-68-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,6,3 and 8 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 139638-68:
(8*1)+(7*3)+(6*9)+(5*6)+(4*3)+(3*8)+(2*6)+(1*8)=169
169 % 10 = 9
So 139638-68-9 is a valid CAS Registry Number.