7542-57-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7542-57-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,4 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 7542-57:
(6*7)+(5*5)+(4*4)+(3*2)+(2*5)+(1*7)=106
106 % 10 = 6
So 7542-57-6 is a valid CAS Registry Number.