1242-01-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1242-01-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,4 and 2 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1242-01:
(6*1)+(5*2)+(4*4)+(3*2)+(2*0)+(1*1)=39
39 % 10 = 9
So 1242-01-9 is a valid CAS Registry Number.