3666-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3666-91-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,6 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 3666-91:
(6*3)+(5*6)+(4*6)+(3*6)+(2*9)+(1*1)=109
109 % 10 = 9
So 3666-91-9 is a valid CAS Registry Number.