7443-26-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7443-26-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,4 and 3 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 7443-26:
(6*7)+(5*4)+(4*4)+(3*3)+(2*2)+(1*6)=97
97 % 10 = 7
So 7443-26-7 is a valid CAS Registry Number.