6649-49-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6649-49-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,4 and 9 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6649-49:
(6*6)+(5*6)+(4*4)+(3*9)+(2*4)+(1*9)=126
126 % 10 = 6
So 6649-49-6 is a valid CAS Registry Number.