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Quaternary Ammonium Salts Quaternary Phosphonium Salts Polyglycols & Crowns Ionic Liquids

Quaternary Ammonium Salts BTEAC BTMAC CPC CTAB PTMAC TBAB TBAF TBAHS TEAB TEBA TPAB TOMAC TOAB Full Names Below (alphabetical) ALIQUAT® 100 ALIQUAT® 175 ALIQUAT® 336 Benzyl Tributyl Ammonium Bromide Benzyl Tributyl Ammonium Chloride Benzyl Triethyl Ammonium Bromide Benzyl Triethyl Ammonium Chloride Benzyl Trimethyl Ammonium Chloride Cetyl Pyridinium Bromide Cetyl Pyridinium Chloride Cetyl Trimethyl Ammonium Bromide Cetyl Trimethyl Ammonium Chloride Didecyl Dimethyl Ammonium Chloride Dimethyl Distearyl Ammonium Chloride Dodecyl Trimethyl Ammonium Bromide Dodecyl Trimethyl Ammonium Chloride Hexadecyl Trimethyl Ammonium Chloride Methyl Tributyl Ammonium Chloride Methyl Tricaprylyl Ammonium Chloride Methyl Tricaprylyl Ammonium Cl on SILICA Methyl Trioctyl Ammonium Chloride Phenyl Trimethyl Ammonium Chloride Tetrabutyl Ammonium Bromide Tetrabutyl Ammonium Chloride Tetrabutyl Ammonium Fluoride Tetrabutyl Ammonium Hydrogen Sulfate Tetrabutyl Ammonium Hydroxide Tetrabutyl Ammonium Iodide Tetrabutyl Ammonium Perchlorate Tetraethyl Ammonium Bromide Tetraethyl Ammonium Chloride Tetraethyl Ammonium Hydroxide Tetrahexyl Ammonium Iodide Tetramethyl Ammonium Bromide Tetramethyl Ammonium Chloride Tetraoctyl Ammonium Bromide Tetrapropyl Ammonium Bromide Tetrapropyl Ammonium Hydroxide Tributyl Methyl Ammonium Chloride Triethyl Benzyl Ammonium Chloride top of page Quaternary Phosphonium Salts Benzyl Triphenyl Phosphonium Bromide Benzyl Triphenyl Phosphonium Chloride Butyl Triphenyl Phosphonium Bromide Butyl Triphenyl Phosphonium Chloride Ethyl Triphenyl Phosphonium Acetate Ethyl Triphenyl Phosphonium Bromide Ethyl Triphenyl Phosphonium Iodide Hexadecyl Tributyl Phosphonium Bromide Methyl Triphenyl Phosphonium Bromide Tetrabutyl Phosphonium Chloride Tetraoctyl Phosphonium Bromide Tetraphenyl Phosphonium Bromide Tributyl Octyl Phosphonium Chloride Trihexyl Tetradecyl Phosphonium Chloride top of page Polyglycols and Crown Ethers 18-crown-6 Aliplex DB186 Dibenzo-18-crown-6 Polyethylene Glycol 400 top of page	PTC Supplier Statements suppliers state why you should purchase from their company	Other Phase-Transfer Catalysts ALIQUAT® HTA-1 (high-temp catalyst) Anthracenylmethyl Cinchonidinium Cl (chiral) top of page


		"q-value" and "C#" On many of the quat pages, you will see references to "q-value" and "C#". These are useful parameters for correlating reactivity and selectivity in PTC systems. The q-value was proposed by Marc Halpern (PTC Organics) in 1988 and reflects the accessibility of the positive charge of a quat. A q-value of 1.0 to 2.0 often gives high reactivity for "transfer rate limited" PTC reactions whereas a q-value of < 1 often gives high reactivity for PTC reactions which require a loose ion pair. The q-value is calculated by adding the reciprocals of the numbers of carbons on each of the 4 chains. C# is simply the sum of all of the carbons of the quat and is a measure of the organophilicity of the quat.

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