21530 Sigma-Aldrich

Hexanoic acid

purum, ≥98.0% (GC)

Synonym: Acid C6, Caproic acid

  • CAS Number 142-62-1

  • Linear Formula CH3(CH2)4COOH

  • Molecular Weight 116.16

  •  Beilstein Registry Number 773837

  •  EC Number 205-550-7

  •  MDL number MFCD00004421

  •  PubChem Substance ID 329752165



Related Categories Biochemicals and Reagents, Building Blocks, C6, Carbonyl Compounds, Carboxylic Acids,
vapor density   4 (vs air)
vapor pressure   0.18 mmHg ( 20 °C)
grade   purum
assay   ≥98.0% (GC)
refractive index   n20/D 1.416
  n20/D 1.4161(lit.)
bp   202-203 °C(lit.)
  203-205 °C
mp   −4 °C(lit.)
solubility   water: slightly soluble 1.082g/100g(lit.)
  diethyl ether: soluble(lit.)
  ethanol: soluble(lit.)
density   0.927 g/mL at 25 °C(lit.)
Organoleptic   pungent


Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Price and Availability

The Future of Bioimaging

All labs need water
Safety & Documentation

Safety Information

GHS05  GHS05
Signal word 
Hazard statements 
UN 2829 8 / PGIII
WGK Germany 
Flash Point(F) 
215.6 °F
Flash Point(C) 
102 °C

Frequently Asked Questions

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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option:
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. 
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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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.
Show more questions
Protocols & Articles
Peer-Reviewed Papers


Related Products

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?