The CAS Registry Mumber 128802-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,0 and 2 respectively; the second part has 2 digits, 5 and 3 respectively. Calculate Digit Verification of CAS Registry Number 128802-53: (8*1)+(7*2)+(6*8)+(5*8)+(4*0)+(3*2)+(2*5)+(1*3)=129 129 % 10 = 9 So 128802-53-9 is a valid CAS Registry Number.
Get Best Price for128802-53-9(3R,3aS,6S,9aS,9bS)-2,3,3a,9,9a,9b-Hexahydro-3-hydroxy-3-(hydroxymethyl)-6-(3-chloro-2-buten-1-yl)-3a,6-dimethyl-1H-benzindene-5,7-(4H,8H)-dione 3,1'-O-Isopropylidene Acetal