121981-66-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121981-66-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,9,8 and 1 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 121981-66:
(8*1)+(7*2)+(6*1)+(5*9)+(4*8)+(3*1)+(2*6)+(1*6)=126
126 % 10 = 6
So 121981-66-6 is a valid CAS Registry Number.