7559-39-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7559-39-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,5 and 9 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7559-39:
(6*7)+(5*5)+(4*5)+(3*9)+(2*3)+(1*9)=129
129 % 10 = 9
So 7559-39-9 is a valid CAS Registry Number.