Isovaleric acid 503-74-2 CAS NO.503-74-2

Synonyms: BETA-METHYLBUTYRIC ACID;ISOPENTANOIC ACID;ISOPROPYLACETIC ACID;FEMA 3102;ISOVALERIC ACID;3-METHYLBUTANOIC ACID;3-METHYLBUTYRIC ACID;AKOS BBS-00003796
CAS: 503-74-2
MF: C5H10O2
MW: 102.13
EINECS: 207-975-3
Product Categories: Pharmaceutical Raw Materials;Artemisia vulgaris;Building Blocks;C1 to C5;Carbonyl Compounds;Carboxylic Acids;Carthamus tinctorius (Safflower oil);Chemical Synthesis;Humulus lupulus (Hops);Hypericum perforatum (St John′;Nutrition Research;Organic Building Blocks;Panax ginseng;Phytochemicals by Plant (Food/Spice/Herb);s wort)
Mol File: 503-74-2.mol
Isovaleric acid Structure
Isovaleric acid Chemical Properties
Melting point  -35 °C
Boiling point  176 °C
density  0.926
vapor pressure  0.38 mm Hg ( 20 °C)
FEMA  3102
refractive index  n20/D 1.403(lit.)
Fp  159 °F
Water Solubility  25 g/L (20 ºC)
Merck  14,5231
BRN  1098522
CAS DataBase Reference 503-74-2(CAS DataBase Reference)
NIST Chemistry Reference Butanoic acid, 3-methyl-(503-74-2)
EPA Substance Registry System Butanoic acid, 3-methyl-(503-74-2)
Safety Information
Hazard Codes  C,T
Risk Statements  34-24-22
Safety Statements  26-36/37/39-45-38-28A
RIDADR  UN 3265 8/PG 2
WGK Germany  1
RTECS  NY1400000
F  13
TSCA  Yes
HazardClass  6.1
PackingGroup  III
Hazardous Substances Data 503-74-2(Hazardous Substances Data)

Chemical Properties clear colorless to slightly yellow liquid
Definition ChEBI: A C5, branched-chain saturated fatty acid.
General Description Isovaleric acid is a colorless liquid with a penetrating odor. Isovaleric acid is slightly soluble in water. Isovaleric acid is corrosive to metals and to tissue.
Air & Water Reactions Isovaleric acid is slightly soluble in water.
Reactivity Profile Isovaleric 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 Isovaleric acid 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.
Health Hazard TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.