666212-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666212-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,2,1 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 666212-90:
(8*6)+(7*6)+(6*6)+(5*2)+(4*1)+(3*2)+(2*9)+(1*0)=164
164 % 10 = 4
So 666212-90-4 is a valid CAS Registry Number.