2-Ethylhexanoic Acid CAS NO. 149-57-5

2-Ethylhexanoic acid

Hexanoic acid,2-ethyl-;Caproic acid,α-ethyl-;2-Ethylhexanoic acid;Butylethylacetic acid;α-Ethylcaproic acid;2-Ethylhexoic acid;3-Heptanecarboxylic acid;2-Ethylcaproic acid;Ethylhexanoic acid;α-Ethylhexanoic acid;2-Butylbutanoic acid;2-Ethyl-1-hexanoic acid;(±)-2-Ethylhexanoic acid;NSC 8881;Octylic acid;83829-68-9;202054-39-5

149-57-5

C8H16O2

InChIKey=OBETXYAYXDNJHR-UHFFFAOYSA-N

144.21100

144.21

262-971-9

0477

8881

1993

DTXSID9025293

Clear liquid

29159080

Organometallic Compounds

37.30000

2.6

Ethylhexoic acid is a colorless to light yellow liquid with a mild odor. It will burn though it may take some effort to ignite. It is slightly soluble in water. It is corrosive to metals and tissue. It is used to make paint dryers and plasticizers.

0.9031 g/cm³ @ Temp: 25 °C

-59 °C

228 °C

114ºC

1.424-1.426

Solubility in water, g/100ml: 0.14 (very poor)

Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.

<0.01 mm Hg ( 20 °C)

4.98 (vs air)

Lower flammable limit: 0.8% by volume; Upper flammable limit: 6.0% by volume

vol% in air: 0.8

Mild odor

Henry's Law constant = 2.8X10-6 atm-cu m/mol at 25 °C (est)

Hydroxyl radical reaction rate constant = 8.18X10-12 cu cm/molec-sec at 25 °C (est)

No rapid reaction with air. No rapid reaction with water.

Acids, Carboxylic

ETHYLHEXOIC ACID is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in it to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.

699 °F (USCG, 1999)|700 °F (371 °C)|371 °C

Lower flammable limit: 0.8% by volume; Upper flammable limit: 6.0% by volume

Critical temperature: 615.2 K