Pivalic acid 75-98-9

Pivalic acid

Propanoic acid,2,2-dimethyl-;Pivalic acid;2,2-Dimethylpropanoic acid;α,α-Dimethylpropionic acid;Neopentanoic acid;Trimethylacetic acid;2,2-Dimethylpropionic acid;tert-Pentanoic acid;2,2,2-Trimethylacetic acid;Versatic 5 acid;Trimethylmethanecarboxylic acid;NSC 65449;Neovaleric acid;Versatic Acid 5

75-98-9

C5H10O2

InChIKey=IUGYQRQAERSCNH-UHFFFAOYSA-N

102.13

102.13

969480

200-922-5

813RE8BX41

0486

65449

3261

DTXSID8026432

Colorless cyrstals|Needles

29159000

Bulk Drug Intermediates

37.3

1.5

Yellow to orange to tan Powder, Crystals and/or Chunks

0.905 g/cm³ @ Temp: 50 °C

35.5 °C

163.8 °C

147 °F

1.393

H2O: 25 g/L (20 ºC)

2-8°C

9.75 mm Hg ( 60 °C)

3.6 (vs air)

LD50 orally in Rabbit: 900 mg/kg LD50 dermal Rat 1900 mg/kg

1.6%(V)

2.78e-06 atm-m3/mole|Henry's Law constant = 2.78X10-6 atm-cu m/mole at 25 °C

pKa = 5.03 at 25 °C

Liquid. Density: 0.8580 at 18 °C/4 °C; bp 118.2 °C; index of refraction: 1.3922 at 18 °C/D /Ethyl ester/|Hydroxyl radical reaction rate constant = 5.9X10-13 cu cm/molec-sec at 25 °C (est)

With mixing, water soluble.

Acids, Carboxylic

TRIMETHYLACETIC 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.

560 °C