42921-26-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42921-26-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,2 and 1 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 42921-26:
(7*4)+(6*2)+(5*9)+(4*2)+(3*1)+(2*2)+(1*6)=106
106 % 10 = 6
So 42921-26-6 is a valid CAS Registry Number.