6591-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6591-25-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,9 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 6591-25:
(6*6)+(5*5)+(4*9)+(3*1)+(2*2)+(1*5)=109
109 % 10 = 9
So 6591-25-9 is a valid CAS Registry Number.