Hexanoic acid


Acid C6, Caproic acid
Linear Formula:
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

vapor density

4 (vs air)

vapor pressure

0.18 mmHg ( 20 °C)



refractive index

n20/D 1.4161 (lit.)


202-203 °C (lit.)


−4 °C (lit.)


H2O: slightly soluble
diethyl ether: easily soluble
ethanol: easily soluble


0.927 g/mL at 25 °C (lit.)



SMILES string




InChI key


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General description

Hexanoic acid is a resistance priming inducer that protects tomato plants from Botrytis cinerea.


Hexanoic acid can be used:
  • To prepare polyethylene glycol derived nanomicelles as a non-viral gene carrier.
  • As a starting material to synthesize an amino acid L-norleucine.
  • As a reactant to prepare 4-methoxy phenyl hexyl ketone through Friedel−Crafts acylation of anisole using Hβ zeolite-based catalyst.
  • As a template in the preparation of highly conducting thin polypyrrole coated alumina composite particles.


2.5, 100, 500 g in glass bottle


CorrosionSkull and crossbones

Signal Word


Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


UN 2829 8 / PGIII

WGK Germany


Flash Point(F)

215.6 °F - closed cup

Flash Point(C)

102 °C - closed cup

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. What is the molarity of hexanoic acid?

    Based on density of 0.927 g/mL and MW of 116.16, the effective molarity of this neat liquid is 7.98 M.

  6. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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Buddhadev Layek et al.
Molecular pharmaceutics, 11(3), 982-994 (2014-02-07)
Gene therapy holds immense potential as a future therapeutic strategy for the treatment of numerous genetic diseases which are incurable to date. Nevertheless, safe and efficient gene delivery remains the most challenging aspects of gene therapy. To overcome this difficulty...
Enantioselective biocatalytic formal α-amination of hexanoic acid to l-norleucine
Dennig A, et al.
Organic & Biomolecular Chemistry, 16(43), 8030-8033 (2018)
Friedel-Crafts acylation of anisole with hexanoic acid catalyzed by Hβ zeolite-supported tungstophosphoric acid
Bai G, et al.
Research on Chemical Intermediates, 41(8), 5041-5048 (2015)
Hexanoic acid and polyethylene glycol double grafted amphiphilic chitosan for enhanced gene delivery: influence of hydrophobic and hydrophilic substitution degree
Layek B, et al.
Molecular Pharmaceutics, 11(3), 982-994 (2014)
Ivan Finiti et al.
Molecular plant pathology, 15(6), 550-562 (2013-12-11)
Treatment with the resistance priming inducer hexanoic acid (Hx) protects tomato plants from Botrytis cinerea by activating defence responses. To investigate the molecular mechanisms underlying hexanoic acid-induced resistance (Hx-IR), we compared the expression profiles of three different conditions: Botrytis-infected plants...
In this study, SPME was used for the analysis of free fatty acids in Parmesan cheese using a 65 μm Carbowax/divinylbenzene (DVB) SPME fiber. Headspace extraction of the cheese sample was conducted at 65 °C for 15 minutes and analyzed by GC with FID detection. SPME is ideal for analyzing the volatiles associated with solid food samples. The phase chemistry of the Nukol GC column provides excellent peak shape of acidic compounds.
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