71672-64-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71672-64-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,7 and 2 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 71672-64:
(7*7)+(6*1)+(5*6)+(4*7)+(3*2)+(2*6)+(1*4)=135
135 % 10 = 5
So 71672-64-5 is a valid CAS Registry Number.