71672-68-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71672-68-9 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 8 respectively.
Calculate Digit Verification of CAS Registry Number 71672-68:
(7*7)+(6*1)+(5*6)+(4*7)+(3*2)+(2*6)+(1*8)=139
139 % 10 = 9
So 71672-68-9 is a valid CAS Registry Number.