2-methylbutyric acid

CAS Number
116-53-0
EC Number
204-145-2
Chemical Formula
C5H10O2
Molecular Weight
102.13 g/mol
FEMA Number
FEMA 2695

Description

2-Methylbutyric acid (CAS 116-53-0), also known by its FEMA 2695 designation, is a short-chain branched organic acid used primarily as a flavoring agent and fragrance ingredient. It delivers a characteristic pungent, cheesy, and fruity odor profile that underpins its demand in both food and personal care formulations. In food and beverage manufacturing, it functions as a flavor compound.

It contributes to dairy, fruit, and savory taste profiles in products such as cheese analogs, snack seasonings, and processed meat flavors. Fragrance formulators incorporate it into personal care products. These include soaps, shampoos, and fine fragrances where its sharp, fermented note adds depth to complex scent compositions. At controlled concentrations, it also acts as a pH modifier and mild preservative.

In cosmetic formulations, its acidic buffering supports product stability. Flavor houses source it as a building block for synthesizing more complex ester-based aroma chemicals for various industries. The product is supplied as a colorless to pale yellow liquid. It is available in food-grade quality meeting FEMA and FCC standards, as well as technical grade for industrial and fragrance applications.

Packaging typically ranges from small drums to bulk quantities depending on application volume. This ensures flexibility for both small-scale specialty labs and large-scale manufacturing facilities.

Other Names (Synonyms)

methylethylacetic acid|ethylmethylacetic acid|DL-2-methylbutyric acid|butane-2-carboxylic acid|alpha-methylbutyric acid|2-methylbutanoic acid|2-methybutyric acid|2-ethylpropionic acid

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point -70 °C
Boiling Point 177 °C
Density 0.9338 g/cm³ @ Temp: 21 °C
Flash Point 165 °F
Appearance clear colorless to pale yellowish liquid
Color Clear colorless to pale yellow
Odor at 10.00 % in propylene glycol. pungent acid roquefort cheese
Form Liquid
Water Solubility 45 g/L (20 ºC)
Vapor Pressure 0.5 mm Hg ( 20 °C)
Refractive Index n 20/D 1.405(lit.)
Log P 1.8 at 25℃

Documentation

Safety & Handling Learn More

Danger
GHS05· Corrosive GHS07· Irritant

Hazard Statements

H290 May be corrosive to metals
H302 Harmful if swallowed
H312 Harmful in contact with skin
H314 Causes severe skin burns and eye damage
H318 Causes serious eye damage

Precautionary Statements

P234 Keep only in original packaging.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.

Trade & Regulatory

HS Code 29156090
UN Number 3265
ADR Class 8
Packing Group III
Storage Class 8A - Combustible corrosive hazardous materials
WGK (Germany) 1
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