Isobutyric acid

CAS Number

79-31-2

Molecular Formula

C4H8O2

Also known as:

2-Methylpropionic acid; Isopropylformic acid; 2-Methylpropanoic acid; Isobutanoic acid.

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Product Description

Product Introduction

Isobutyric acid (CAS 79-31-2), also known as 2-Methylpropionic acid, is a short-chain fatty acid with a characteristic sharp, pungent odor. It is an isomer of n-butyric acid but offers distinct chemical reactivity due to its branched structure. Industrially, it is an indispensable building block used to produce a wide array of isobutyrate esters, which are prized in the flavor and fragrance industry for their fruity notes. Beyond aromatics, it serves as a vital intermediate in the synthesis of pharmaceuticals, agrochemicals, and specialized surfactants.


Product Selling Points

1. High Esterification Yields

  • Advantage: Its branched structure provides specific sterics that favor the production of high-value isobutyrate esters.

  • Benefit: Superior Fragrance Production: Ideal for creating high-purity flavor compounds used in food, beverages, and perfumes, ensuring consistent aromatic profiles.

2. Excellent Chemical Stability & Purity

  • Advantage: Our product maintains a minimum assay of 99.5% with strictly controlled levels of n-butyric acid impurities.

  • Benefit: Reliable Synthesis: Minimizes side reactions in complex pharmaceutical and agrochemical processes, leading to higher final product quality and easier purification.

3. Versatile Biological & Industrial Application

  • Advantage: Acts as an effective pH regulator and an intermediate for animal feed supplements (isobutyrate salts).

  • Benefit: Multi-Industry Utility: Provides a cost-effective solution for diverse sectors, from textile auxiliaries to enhancing the nutritional value of ruminant feed.


Applications

Flavor & Fragrance

The primary precursor for isobutyrate esters (e.g., ethyl isobutyrate, benzyl isobutyrate), providing apple, pineapple, and apricot notes.

Pharmaceutical Synthesis

Used as a reagent in the production of various active pharmaceutical ingredients (APIs), including specialized antiviral and cardiovascular drugs.

Animal Feed Additives

Converted into salts used as nutrients to improve the efficiency of digestion and fermentation in ruminants.

Industrial Auxiliaries

Applied in the production of varnish, textile processing chemicals, and as a solvent in specialized coatings.


Packaging & Storage

  • Packaging: 190kg net weight in UN-certified plastic drums or IBC tanks.

  • Storage: Store in a cool, dry, and well-ventilated area. Crucial: Isobutyric acid has a strong, persistent odor; ensure containers are hermetically sealed. It is a combustible liquid and should be stored away from heat, sparks, and strong oxidizing agents.


Synonyms

2-Methylpropionic acid; Isopropylformic acid; 2-Methylpropanoic acid; Isobutanoic acid.


Matching Materials

  • Methanol/Ethanol —— For the synthesis of methyl/ethyl isobutyrate

  • Isobutanol (CAS 78-83-1) —— For producing isobutyl isobutyrate

  • Phosphorus Trichloride (PCl3) —— Used to convert the acid into isobutyryl chloride

  • Ruminant Feed Premixes —— Complementary use in agricultural applications

  • Sodium Hydroxide (NaOH) —— For the production of sodium isobutyrate


FAQ

Q: Where is the EINECS number for this product?

A: The EINECS number is 201-195-7, as shown in our physical properties table.

Q: Is Isobutyric Acid corrosive?

A: Yes, it is a corrosive liquid. It can cause skin burns and eye damage. Proper PPE (gloves, goggles) is required during handling.

Q: How do you control the odor during transport?

A: We use high-density UN-approved drums with reinforced seals to ensure no vapor leakage. We recommend storage in a dedicated chemical warehouse with adequate ventilation.

Q: Can it be used directly in food?

A: Isobutyric acid is used as a flavoring substance, but it must be handled according to food-grade regulations (FEMA/GRAS) when intended for that purpose. Our standard industrial grade is typically for chemical synthesis.

Technical Parameters

Parameter Value
Appearance Colorless Clear Liquid
Assay (GC) 99.72%
n-Butyric Acid 0.08%
Moisture 0.04%
Color (APHA) < 10

Applications

Colorants/Flavors and Fragrances

Quick Information

EINECS 201-195-7
Molecular Weight 88.11 g/mol

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