638138-07-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 638138-07-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,8,1,3 and 8 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 638138-07:
(8*6)+(7*3)+(6*8)+(5*1)+(4*3)+(3*8)+(2*0)+(1*7)=165
165 % 10 = 5
So 638138-07-5 is a valid CAS Registry Number.