666836-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666836-89-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,8,3 and 6 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 666836-89:
(8*6)+(7*6)+(6*6)+(5*8)+(4*3)+(3*6)+(2*8)+(1*9)=221
221 % 10 = 1
So 666836-89-1 is a valid CAS Registry Number.