1242142-53-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1242142-53-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,2,1,4 and 2 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1242142-53:
(9*1)+(8*2)+(7*4)+(6*2)+(5*1)+(4*4)+(3*2)+(2*5)+(1*3)=105
105 % 10 = 5
So 1242142-53-5 is a valid CAS Registry Number.