2542-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2542-34-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,5,4 and 2 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 2542-34:
(6*2)+(5*5)+(4*4)+(3*2)+(2*3)+(1*4)=69
69 % 10 = 9
So 2542-34-9 is a valid CAS Registry Number.