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


Full Names Below



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


Aliplex DB186


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

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.

In-House PTC Course

Top PTC Reactions

Etherification · Esterification · Transesterification · N-Alkylation · C-Alkylation · S-Alkylation · Other Mercaptan Reactions · Dehydrohalogenation · Michael Addition · Aldol Condensation · Oxidation · Epoxidation · Chloromethylation · Hydrohalogenation · Hydrogenation · Borohydride Reduction · Darzens Condensation · Carbene Reactions · Polymerization · Polymer Modification · Displacements using: · cyanide · fluoride · bromide · iodide · azide · thiocyanate · sulfide · other inorganic nucleophiles · benzyl chloride · allyl chloride · benzoyl chloride · methanesulfonyl chloride · epichlorohydrin · PCl3, · POCl3 · other alkyl halides, acyl halides, sulfonyl halides, phosphoro halides & anhydrides

PTC Consulting  

PTC Training

   PTC improves
yield, cycle time, quality, safety 
and environmental performance

PTC Technology &
Information Center

Register here 
for the journal
 "Industrial  Phase-Transfer Catalysis"
and the E-newsletter
 "PTC Tip of the Month"

Phase-Transfer Catalysis
your cost of manufacture!

PTC improves performance for generic pharma and agchem

  Home Page

     Industrial Phase-Transfer Catalysis


Phase-Transfer Catalysts Suppliers
Browse these pages to expand and protect your existing PTC business!

Subscription Plans, Options & Pricing

SUBSCRIBE HERE - Subscription Form

Copyright 2003-7 PTC Communications, Inc.