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Isovaleric acid

Isovaleric acid
Isovaleric acid structure
Chemical Name:
Isovaleric acid
FEMA 3102;iso-C4H9COOH;isopentanoic;i-Valcrians1 ;isovalerianic;delphinicacid;Delphinic acid;Isovaleric aci;femanumber:3102;ISOVALERIC ACID
Molecular Formula:
Formula Weight:
MOL File:

Isovaleric acid Properties

Melting point:
-35 °C
Boiling point:
176 °C
vapor pressure 
0.38 mm Hg ( 20 °C)
refractive index 
n20/D 1.403(lit.)
Flash point:
159 °F
storage temp. 
Store below +30°C.
4.77(at 25℃)
Clear colorless to slightly yellow
Specific Gravity
0.928 (20/20℃)
3.1 (10g/l, H2O, 25℃)
explosive limit
Water Solubility 
25 g/L (20 ºC)
JECFA Number
CAS DataBase Reference
503-74-2(CAS DataBase Reference)
NIST Chemistry Reference
Butanoic acid, 3-methyl-(503-74-2)
EPA Substance Registry System
Isovaleric acid (503-74-2)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H314-H227-H318
Precautionary statements  P210e-P260h-P405-P501a-P280-P305+P351+P338-P310-P303+P361+P353-P304+P340+P310
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
Autoignition Temperature 824 °F
HS Code  2915 60 90
HazardClass  6.1
PackingGroup  III
Toxicity LD50 i.v. in mice: 1120±30 mg/kg (Or, Wretlind)
NFPA 704
3 0

Isovaleric acid price More Price(20)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 129542 Isovaleric acid 99% 503-74-2 100ml $23.9 2019-12-02 Buy
Sigma-Aldrich 129542 Isovaleric acid 99% 503-74-2 500ml $49.7 2019-12-02 Buy
TCI Chemical M0182 Isovaleric Acid >99.0%(GC) 503-74-2 25mL $16 2019-12-02 Buy
TCI Chemical M0182 Isovaleric Acid >99.0%(GC) 503-74-2 500mL $45 2019-12-02 Buy
Alfa Aesar A18642 Isovaleric acid, 98% 503-74-2 250ml $23.6 2019-12-02 Buy

Isovaleric acid Chemical Properties,Uses,Production


Isovaleric acid has a characteristic disagreeable odor. It is extremely penetrating and persistent with a sour taste. May be synthesized by oxidation of isoamyl alcohol or isovaleric aldehyde.

Chemical Properties

Isovaleric acid has a characteristic disagreeable, rancid, cheese-like odor. It is extremely penetrating and persistent with a sour taste. May consist of one or a mixture of isomers or n-pentanoic acid and/or 2- or 3-methyl butanoic acid. Consumption: Annual: 1850.00 lb

Chemical Properties

clear colorless to slightly yellow liquid


Of the three possible isomers of n-valeric acid, only isovaleric acid has extensive application in flavoring; originally reported in seal and dolphin fat; subsequently isolated from valerian. Also reported found in the essential oils of cypress, citronella, laurel leaves, cajeput, Cymbopogon javanensis, hops, Persea pubescens, geranium, American peppermint, spearmint, rosemary, lemongrass, Eucalyptus goniocalyx and other spp., tobacco, Monarda fistulos, Thymus mastichina, Artemisia frigida, and probably in lavender; reported among the constituents of petitgrain lemon. Also reported found in many foods including apple, currants, guava, grapes, papaya, peach, pineapple, raspberry, strawberry, potato, bell pepper, vinegar, breads, many cheeses, fish, chicken, lamb, hop oil, beer, cognac, whiskies, cider, sherry, grape wines, rum, cocoa, tea, coffee, honey, soybean, passion fruit, mushrooms, marjoram, plum, brandy, starfruit, trassi, rice, jackfruit, sake, sukiyaki, buckwheat, corn oil, cashew apple, malt, wort, Bourbon vanilla, shrimp, mussels, cherimoya, Cape gooseberry and Chinese quince frui


Isovaleric acid is used extensively as a flavoring ingredient in nonalcoholic beverages and in foods such as ice cream, candy, baked goods, and cheese, as a fragrance ingredient in perfumes, and as a chemical intermediate in the manufacture of sedatives and other pharmaceutical products. It is also used as an extractant of mercaptans from petroleum hydrocarbons, a vinyl stabilizer, and as an intermediate in the manufacture of plasticizers and synthetic lubricants.


In flavors, perfumes, manufacture of sedatives.


ChEBI: A C5, branched-chain saturated fatty acid.


By oxidation of isoamyl alcohol or isovaleric aldehyde

Aroma threshold values

Detection: 190 ppb to 2.8 ppm

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.


Strong irritant to tissue.

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.

Isovaleric acid Preparation Products And Raw materials

Raw materials

Preparation Products

Isovaleric acid Suppliers

Global( 242)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32447 55
career henan chemical co
+86-371-86658258 CHINA 29995 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23981 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28236 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 8814 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114 CHINA 6372 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23049 58
Chongqing Chemdad Co., Ltd
+86-13650506873 CHINA 35440 58
Henan tianfu chemical co. LTD
0371-55170695 CHINA 20538 58
86-18523575427 CHINA 47486 58

View Lastest Price from Isovaleric acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-17 Isovaleric acid
US $1.00 / kg 1kg 99% 100KG career henan chemical co

Isovaleric acid Spectrum

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