638191-32-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 638191-32-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,8,1,9 and 1 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 638191-32:
(8*6)+(7*3)+(6*8)+(5*1)+(4*9)+(3*1)+(2*3)+(1*2)=169
169 % 10 = 9
So 638191-32-9 is a valid CAS Registry Number.