Pelargonic acid

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Structural formula
Structural formula of pelargonic acid
General
Surname Pelargonic acid
other names
  • Nonanoic acid
  • Octanecarboxylic acid
Molecular formula C 9 H 18 O 2
Brief description

colorless liquid with a faint odor

External identifiers / databases
CAS number 112-05-0
EC number 203-931-2
ECHA InfoCard 100.003.574
PubChem 8158
Wikidata Q369777
properties
Molar mass 158.24 g mol −1
Physical state

liquid

density

0.9052 g cm −3 (20 ° C)

Melting point

12.4 ° C

boiling point

255 ° C

Vapor pressure

0.04 hPa (20 ° C)

pK s value

4.96 (25 ° C)

solubility

very bad in water (0.3 g l −1 at 25 ° C)

Refractive index

1.4343 (19 ° C)

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
07 - Warning

Caution

H and P phrases H: 315-319-412
P: 280-303 + 361 + 353-305 + 351 + 338-310
Toxicological data

> 5000 mg kg −1 ( LD 50 ,  rat ,  oral )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

The pelargonic acid ( nonanoic acid ) is a saturated fat or carboxylic acid which are derived from alkane n - nonane derived. It is an unpleasantly rancid smelling alkanoic acid which is liquid under standard conditions . It is sparingly soluble in water, but easily soluble in alcohols or ethyl acetate. Their salts or esters are called pelargonates or nonanoates . The name is derived from the pelargonium , a genus of the cranesbill family , because they u. a. occurs in their leaves.

Occurrence

Pelargonic acid occurs in the form of its esters in the leaves of Pelargonium roseum , Ajania , Rubus , as well as in hop oil , rose oil and also in human skin. It is a product of the ozonolysis of ω − 9 fatty acids such as B. oleic acid or erucic acid .

use

Pelargonic acid is used in the production of lubricants , alkyd resins and plasticizers . It is also used as a herbicide . It is also the active ingredient in some deterrents (e.g. against rabbits). In addition, pelargonic acid can be used to produce hydrotropic salts.

Admission

In Germany, Austria and Switzerland, plant protection products containing the active ingredient pelargonic acid are permitted.

Individual evidence

  1. ↑ a b c d e f Entry for CAS no. 112-05-0 in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
  2. ↑ a b c David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Dissociation Constants of Organic Acids and Bases, pp. 8-49.
  3. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-398.
  4. ↑ Entry on nonanoic acid in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on April 1, 2017. Manufacturers or distributors can expand the harmonized classification and labeling .
  5. ↑ Data sheet perlagonic acid (PDF) from Carl Roth , accessed on May 5, 2016.
  6. ↑ General Directorate Health and Food Safety of the European Commission: Entry on Pelargonic acid (CAS 112-05-0) in the EU pesticide database ; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; accessed on March 12, 2016.

Web links

Wiktionary: Pelargonic acid  - explanations of meanings, word origins, synonyms, translations