67664-71-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67664-71-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,6,6 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 67664-71:
(7*6)+(6*7)+(5*6)+(4*6)+(3*4)+(2*7)+(1*1)=165
165 % 10 = 5
So 67664-71-5 is a valid CAS Registry Number.