666818-13-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666818-13-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,8,1 and 8 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 666818-13:
(8*6)+(7*6)+(6*6)+(5*8)+(4*1)+(3*8)+(2*1)+(1*3)=199
199 % 10 = 9
So 666818-13-9 is a valid CAS Registry Number.