6647-41-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6647-41-2 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 7 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6647-41:
(6*6)+(5*6)+(4*4)+(3*7)+(2*4)+(1*1)=112
112 % 10 = 2
So 6647-41-2 is a valid CAS Registry Number.