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32503-27-8 - Tetra-n-butylammonium hydrogen sulfate, 97% - A14047 - Alfa Aesar

A14047 Tetra-n-butylammonium hydrogen sulfate, 97%

CAS Number

Size Price ($) Quantity Availability
50g 42.54
250g 132.87
1000g 284.28
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Tetra-n-butylammonium hydrogen sulfate, 97%


Chemical Properties

Formula Weight
Melting point
Soluble in water.


Phase transfer catalyst Tetra-n-butylammonium hydrogen sulfate shows antibacterial properties due to the presence of the quaternary amine and the counter ion. It serves as a phase-transfer catalyst, surface-active agent, solvent, intermediate, active ingredient for conditioners, antistatic agent, detergent sanitizers, softener for textiles and paper products, emulsifying agents and pigment dispersers. It is used as an efficient catalyst in the N-alkylation reactions of benzanilides, cyclization of beta-amino acids to beta-lactams, conversion of nitriles to amides, dehydrohalogenation of aryl 2-haloethyl ethers to give vinyl ethers and in the oxidation of alcohols.


Moisture sensitive. Keep the container tightly closed in a dry and well-ventilated place. Incompatible with strong oxidizing agents.

Literature References

Widely used phase-transfer catalyst; see Appendix 2. Some illustrative applications are given below:

Benzanilides have been N-alkylated in the presence of NaOH and K2CO3: Synth. Commun., 18, 2011 (1988).

It was the most effective catalyst studied for the cyclization of ß-amino acids to ß-lactams by methanesulfonyl chloride and KHCO3: Chem. Lett., 443 (1981).

In the dehydrohalogenation of aryl 2-haloethyl ethers to give vinyl ethers, this catalyst was found much more effective than the corresponding halides or benzyltriethylammonium salts: Synthesis, 688 (1979).

For use in the permanganate oxidation of benzylic positions, see Potassium permanganate, A12170.

The oxidation of primary alcohols to aldehydes by potassium chromate under phase-transfer conditions is better for higher homologues, where solubility in the aqueous phase is limited: Synthesis, 134 (1979). For phase-transfer catalyzed dichromate oxidation of secondary alcohols to ketones, see: Tetrahedron Lett., 1601 (1978).

For phase-transfer catalyzed conversion of nitriles to amides by alkaline H2O2, see: Synthesis, 243 (1980).

Pandian, T. S.; Choi, Y.; Srinivasadesikan, V.; Lin, M. C.; Kang, J. A dihydrogen phosphate selective anion receptor based on acylhydrazone and pyrazole. New J. Chem. 2015, 39 (1), 650-658.

Taguchi, H.; Yanagisawa, D.; Morikawa, S.; Hirao, K.; Shirai, N.; Tooyama, I. Synthesis and Tautomerism of Curcumin Derivatives and Related Compounds. Aust. J. Chem. 2015, 68 (2), 224-229.

GHS Hazard and Precautionary Statements

Hazard Statements: H302-H315-H319-H335

Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P280-P305+P351+P338-P304+P340-P362-P301+P312-P312-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Harmonized Tariff Code


  • 13432

    Sodium borohydride, 98%
  • A10221

    Imidazole, 99%
  • A10249

    Tetra-n-butylammonium bromide, 98+%
  • A10624

    4'-Isobutylacetophenone, 97%
  • A10807

    1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 98+%

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