742-90-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 742-90-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,4 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 742-90:
(5*7)+(4*4)+(3*2)+(2*9)+(1*0)=75
75 % 10 = 5
So 742-90-5 is a valid CAS Registry Number.