639-49-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639-49-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,3 and 9 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 639-49:
(5*6)+(4*3)+(3*9)+(2*4)+(1*9)=86
86 % 10 = 6
So 639-49-6 is a valid CAS Registry Number.