637303-09-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 637303-09-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,3,0 and 3 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 637303-09:
(8*6)+(7*3)+(6*7)+(5*3)+(4*0)+(3*3)+(2*0)+(1*9)=144
144 % 10 = 4
So 637303-09-4 is a valid CAS Registry Number.