42909-13-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42909-13-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,0 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 42909-13:
(7*4)+(6*2)+(5*9)+(4*0)+(3*9)+(2*1)+(1*3)=117
117 % 10 = 7
So 42909-13-7 is a valid CAS Registry Number.