7242-97-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7242-97-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,2,4 and 2 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 7242-97:
(6*7)+(5*2)+(4*4)+(3*2)+(2*9)+(1*7)=99
99 % 10 = 9
So 7242-97-9 is a valid CAS Registry Number.