34020-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 34020-54-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,0,2 and 0 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 34020-54:
(7*3)+(6*4)+(5*0)+(4*2)+(3*0)+(2*5)+(1*4)=67
67 % 10 = 7
So 34020-54-7 is a valid CAS Registry Number.