665018-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 665018-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,5,0,1 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 665018-91:
(8*6)+(7*6)+(6*5)+(5*0)+(4*1)+(3*8)+(2*9)+(1*1)=167
167 % 10 = 7
So 665018-91-7 is a valid CAS Registry Number.