Haloalkanes having very low solubility in water is a well-established chemical fact due to their hydrophobic nature and inability to form hydrogen bonds with water molecules, requiring no citation.
The claim that haloalkanes have very low solubility in water is a fundamental chemical property taught in basic chemistry (due to the lack of hydrogen bonding and the hydrophobic carbon chain with halogen substituents). Although several retrieved papers discuss hydration free energies, solvation, and partition coefficients for halogen-containing compounds (such as papers [0], [5], and [11]), the solubility of haloalkanes in water is a basic piece of common knowledge by definition and everyday chemical observation.