66749-15-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66749-15-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,7,4 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 66749-15:
(7*6)+(6*6)+(5*7)+(4*4)+(3*9)+(2*1)+(1*5)=163
163 % 10 = 3
So 66749-15-3 is a valid CAS Registry Number.