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Isobutyric acid

Chemical properties Uses Content analysis Toxicity Use limits Standard for Maximum Allowable Amount Production method Hazards & Safety Information
Isobutyric acid
Isobutyric acid structure
CAS No.
79-31-2
Chemical Name:
Isobutyric acid
Synonyms
FEMA 2222;Tenox EBP 2;Cenex RP b2;iso-C3H7COOH;i-Butyricacid;Isobuttersαure;ISOBUTYRIC ACID;ISO-BUTYRIC AID;Isobutanoicacid;ISOBUTTERSAEURE
CBNumber:
CB3367722
Molecular Formula:
C4H8O2
Formula Weight:
88.11
MOL File:
79-31-2.mol

Isobutyric acid Properties

Melting point:
-47 °C
Boiling point:
153-154 °C(lit.)
Density 
0.95 g/mL at 25 °C(lit.)
vapor density 
3.04 (vs air)
vapor pressure 
1.5 mm Hg ( 20 °C)
refractive index 
n20/D 1.393(lit.)
FEMA 
2222 | ISOBUTYRIC ACID
Flash point:
132 °F
storage temp. 
room temp
solubility 
618g/l
form 
Liquid
pka
4.84(at 20℃)
color 
Clear colorless
PH
2.3 (500g/l, H2O, 25℃)
explosive limit
1.6-7.3%(V)
Water Solubility 
210 g/L (20 ºC)
Merck 
14,5155
JECFA Number
253
BRN 
635770
CAS DataBase Reference
79-31-2(CAS DataBase Reference)
NIST Chemistry Reference
Propanoic acid, 2-methyl-(79-31-2)
EPA Substance Registry System
Propanoic acid, 2-methyl-(79-31-2)
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS02,GHS05,GHS06,GHS07
Signal word  Danger
Hazard statements  H312-H226-H302-H311-H314-H290-H301+H311
Precautionary statements  P241-P501a-P233-P234-P240-P241+P242+P243-P264-P270-P301+P330+P331+P310-P303+P361+P353+P310+P363-P304+P340+P310-P305+P351+P338+P310-P390-P403+P235-P405-P406-P501-P210-P260-P280-P303+P361+P353-P305+P351+P338-P370+P378
Hazard Codes  Xn
Risk Statements  21/22
Safety Statements  23-36/37/39-24/25
RIDADR  UN 2529 3/PG 3
WGK Germany  1
RTECS  NQ4375000
13
Autoignition Temperature 824 °F
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29156000
Toxicity LD50 orally in Rabbit: 266 mg/kg LD50 dermal Rabbit 475 mg/kg

NFPA 704

Diamond Hazard Value Description
2
0
Health  
Flammability   2 Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur and multiple finely divided suspended solids that do not require heating before ignition can occur. Flash point between 37.8 and 93.3 °C (100 and 200 °F). (e.g. diesel fuel, sulfur)
Instability   0 Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2)
Special  

(NFPA, 2010)

Isobutyric acid price More Price(21)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 58360 Isobutyric acid puriss. p.a., ≥99.5% 79-31-2 100ml $30.1 2018-11-13 Buy
Sigma-Aldrich 46935-U Isobutyric acid analytical standard 79-31-2 u $17.2 2018-11-13 Buy
TCI Chemical I0103 Isobutyric Acid >99.0%(GC) 79-31-2 25mL $16 2018-11-22 Buy
TCI Chemical I0103 Isobutyric Acid >99.0%(GC) 79-31-2 500mL $24 2018-11-22 Buy
Alfa Aesar L04038 Isobutyric acid, 99% 79-31-2 500ml $25.4 2018-11-13 Buy

Isobutyric acid Chemical Properties,Uses,Production

Chemical properties

Colorless oily liquid; strong irritating odor; miscible with water; soluble in alcohol, ether and so on.

Uses

1. Isobutyric acid is mainly used in the synthesis of isobutyric acid esters, such as methyl isobutyrate, propyl ester, isoamyl ester and benzyl ester. It can also be used as edible flavor and used in pharmaceutical.
2. GB 2760-1996 provides for isobutyric acid as the food flavors allowed to use. It is mainly used for the preparation of butter, apple, caramel, cheese, bread, yeast and other flavors.
3. Isobutyric acid is not more important than butyric acid, but has the similar uses with n-butyric acid. Isobutyric acid is mainly used to produce the corresponding esters, such as methyl isobutyrate with apricot incense, propyl isobutyrate with pineapple flavor, isobutyl isobutyrate with banana flavor, octyl isobutyrate with grapes taste, benzyl isobutyrate with jasmine smell, etc. It can be used for preparing flavors and solvents and also used in the manufacture of varnishes and plasticizers. Isobutyric acid has some important derivatives that, in the industry, is actually used for the production of isobutyronitrile intermediates, and then converted to isobutylamidine hydrochloride that is the raw materials of pesticide diazinon.
4. Used for the raw materials of perfume and perfume ester, and also used as the solvents of textile auxiliaries (in the form of salt) and a variety of chemical reactions.

Content analysis

Determined by the same content analysis method of "butyric acid (03454)".

Toxicity

GRAS (FEMA).
LD50 280 mg/kg (rat, oral).

Use limits

FEMA (mg/kg): soft drinks 4.1; cold drinks 12; candy 41; baked food 38; gummy candy 470; margarine 30.
Moderate use as limits (FDA § 172.515, 2000).

Standard for Maximum Allowable Amount

English name of the additive: isobutyric acid
English name of the food allowed to use the additive : food
Additive Function:Spice used in food
Maximum allowable use (g/kg) Maximum allowable residue (g/kg)
The spice ingredients for preparing essence shall not exceed the maximum allowable use and maximum allowable residue in GB 2760.

Production method

The preparation of isobutyric acid is similar with butyric acid, which is performed by the direct oxidation of isobutyl alcohol and isobutyraldehyde. Isobutyric acid can be directly generated from the oxidation of isobutyraldehyde in air or oxygen. Other manufacturing methods have isobutyronitrile hydrolysis and methacrylic acid hydrogenation. The oxidation of 2-methyl-1-nitropropane to prepare isobutyric acid can also obtain a higher yield. The purification of Isobutyric acid can be realized by azeotropic distillation with water, and anhydrous isobutyric acid can be obtained by the extractive distillation from carbon tetrachloride. Propylene and formic acid ester can react at 50 °C with the catalysis of hydrofluoric acid to generate methyl isobutyrate and propyl isobutyrate.
Application: Isobutyric acid is not more important than butyric acid, but has the similar uses with n-butyric acid. Isobutyric acid is mainly used to produce the corresponding esters, such as methyl isobutyrate with apricot incense, propyl isobutyrate with pineapple flavor, isobutyl isobutyrate with banana flavor, octyl isobutyrate with grapes taste, benzyl isobutyrate with jasmine smell, etc. It can be used for preparing flavors and solvents and also used in the manufacture of varnishes and plasticizers. Isobutyric acid has some important derivatives that, in the industry, is actually used for the production of isobutyronitrile intermediates, and then converted to isobutylamidine hydrochloride that is the raw materials of pesticide diazinon.

Hazards & Safety Information

Production method :Isobutyric acid can be derived from the oxidation of isobutanol.
Category : Flammable liquids
Toxicity classification : high toxicity
Acute Toxicity : Oral-Rat LD50: 280 mg/kg
Flammability hazard characteristics :Combust when meeting fire, high temperature and strong oxidant; Release irritating smoke when combusting.
Storage and transport characteristics  :Complete packaging; light loading and unloading; warehouse ventilation; away from the fire and high temperature; stored separately with oxidants and alkali.
Fire extinguishing agent : foam, dry powder, carbon dioxide, sand

Description

Isobutyric acid has an odor and flavor similar to n-butyric acid. Prepared via oxidation of isobutyl alcohol.

Chemical Properties

Isobutyric acid has strong penetrating odor of rancid butter. The odor and flavor are similar to n-butyric acid.

Chemical Properties

clear colorless liquid

Occurrence

Reported found in several essential oils: Arnica montana, Roman chamomile, Laurus nobilis, imperatoria, and in carob fruits (Siliqua dulcis); also identified in the essence of Seseli tortuosum, Artemisia transiliensis. Reported found in apple, banana, lingonberry, cranberry, currants, guava, papaya, grapes, pineapple, raspberry, strawberry, celery, potato, bell pepper, tomato, peppermint oil, breads, cheeses, butter, fish, cooked beef and pork, hop oil, beer, rum, cognac, whiskies, cider, honey, grape wines, cocoa, coffee, tea, peanuts, passion fruit, plums, mushrooms, mango, rice, shoyu, sake, buckwheat, laurel, dried bonito, Bourbon vanilla, shrimps, scallops and Chinese quince

Uses

Isobutyric Acid is a flavoring agent that is a colorless liquid with a strong, penetrating odor, resembling butter. it is miscible in alcohol, propylene glycol, glycerin, mineral oil, and most fixed oils and sol- uble in water. it is obtained by chemical synthesis. it is also termed isopropylformic acid.

Uses

Manufacture of esters for solvents, flavors and perfume bases, disinfecting agent, varnish, deliming hides, tanning agent.

Definition

ChEBI: A branched fatty acid comprising propanoic acid carrying a methyl branch at C-2.

Preparation

By oxidation of isobutyl alcohol.

Aroma threshold values

Detection: 10 ppb to 9.5 ppm; aroma characteristics at 10 ppm: acidic pungent, dairy buttery and cheesy with fruity undertones.

Taste threshold values

Taste characteristics at 15 ppm: acidic, sour dairy, creamy, cheese, cultured dairy nuance.

General Description

A colorless liquid with a light odor of rancid butter. Flash point 132°F. Density 7.9 lb / gal. Corrosive to metals and tissue.

Air & Water Reactions

Flammable. Water soluble

Reactivity Profile

Isobutyric acid corrodes aluminum and other metals. Flammable hydrogen gas may accumulate in enclosed spaces in which this reaction has taken place [USCG, 1999].

Hazard

Toxic by ingestion, strong irritant to tissue.

Health Hazard

Inhalation causes irritation of nose and throat. Ingestion causes irritation of mouth and stomach. Contact with eyes or skin causes irritation.

Fire Hazard

Flammable/combustible material. May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Purification Methods

Distil the acid from KMnO4, then redistil it from P2O5. [Beilstein 2 H 288, 2 I 126, 2 II 257, 2 III 637, 2 IV 843.]

Isobutyric acid Preparation Products And Raw materials

Raw materials

Preparation Products


Isobutyric acid Suppliers

Global( 222)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 Abel@chembj.com CHINA 3194 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817
info@dakenchem.com CHINA 21668 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20672 55
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32447 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 info@tnjchem.com China 1861 55
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 30002 58
Chemwill Asia Co.,Ltd.
86-21-51086038
86-21-51861608 chemwill_asia@126.com;sales@chemwill.com;chemwill@hotmail.com;chemwill@gmail.com CHINA 23980 58
Haihang Industry Co.,Ltd
86-531-88032799
+86 531 8582 1093 export@haihangchem.com CHINA 8921 58
QUALITY CONTROL CHEMICALS INC.
(323) 306-3136
(626) 453-0409 orders@qcchemical.com United States 8407 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114
sales@amoychem.com CHINA 6372 58

View Lastest Price from Isobutyric acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-17 Isobutyric acid
79-31-2
US $1.00 / kg 1kg 99% 100KG career henan chemical co

Isobutyric acid Spectrum


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