74734-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74734-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,7,3 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 74734-57:
(7*7)+(6*4)+(5*7)+(4*3)+(3*4)+(2*5)+(1*7)=149
149 % 10 = 9
So 74734-57-9 is a valid CAS Registry Number.