1331-51-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1331-51-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,3 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1331-51:
(6*1)+(5*3)+(4*3)+(3*1)+(2*5)+(1*1)=47
47 % 10 = 7
So 1331-51-7 is a valid CAS Registry Number.