7331-59-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7331-59-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,3,3 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7331-59:
(6*7)+(5*3)+(4*3)+(3*1)+(2*5)+(1*9)=91
91 % 10 = 1
So 7331-59-1 is a valid CAS Registry Number.