639049-39-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639049-39-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,0,4 and 9 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 639049-39:
(8*6)+(7*3)+(6*9)+(5*0)+(4*4)+(3*9)+(2*3)+(1*9)=181
181 % 10 = 1
So 639049-39-1 is a valid CAS Registry Number.