634558-50-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 634558-50-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,4,5,5 and 8 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 634558-50:
(8*6)+(7*3)+(6*4)+(5*5)+(4*5)+(3*8)+(2*5)+(1*0)=172
172 % 10 = 2
So 634558-50-2 is a valid CAS Registry Number.