Butyl lactate

CAS Number
138-22-7
EC Number
205-316-4
Chemical Formula
C7H14O3
Molecular Weight
146.18 g/mol
FEMA Number
FEMA 2205

Description

Butyl lactate (CAS 138-22-7), also known by its FEMA 2205 designation, is a slow-evaporating ester solvent derived from lactic acid used across industrial, cosmetic, and food applications. It combines strong solvency with low toxicity, making it a preferred alternative to conventional petrochemical solvents in formulations requiring a more favorable regulatory and environmental profile.

In coatings, inks, and polymer processing, it dissolves resins, nitrocellulose, and cellulose acetate butyrate where controlled evaporation rate and film quality are critical for the final product. Personal care formulators use it as a carrier solvent in nail care products, fragrances, and skin formulations where compatibility with active ingredients and low irritation potential drive solvent selection.

As a flavoring agent, it contributes buttery, creamy top notes to food and beverage products including dairy analogs, baked goods, and confectionery. It also functions as a plasticizer and coalescing agent. Butyl lactate is supplied as a clear liquid in drum and IBC quantities, with bulk tanker options available for high-volume industrial buyers. Standard commercial grades include technical grade for solvents.

Food and flavor grades meeting specific purity specifications are available for sensitive applications. Kosher and natural-origin certified material is available from select producers to support clean-label positioning.

Other Names (Synonyms)

n-butyl lactate|butyl ester of lactic acid|butyl ester of 2-hydroxypropanoic acid|butyl 2-hydroxypropanoate|Propanoic acid, 2-hydroxy-, butyl ester|Lactic acid, butyl ester|2-Hydroxypropanoic acid butyl ester|Butylester kyseliny mlecne

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 -28 °C
Boiling Point 186 °C
Density 0.9815 g/cm³ @ Temp: 20 °C; Press: 759.8 Torr
Flash Point 157 °F
Appearance CLEAR COLOURLESS LIQUID
Color Clear colorless
Odor at 100.00 %. green fruity apple kiwi melon rind lactonic waxy winey apple skin soapy
Form Liquid
Water Solubility 42 g/L (25 ºC)
Vapor Pressure 0.4 mm Hg ( 20 °C)
Refractive Index n 20/D 1.421(lit.)
Log P 0.88

Documentation

Safety & Handling Learn More

Danger
GHS05· Corrosive GHS07· Irritant

Hazard Statements

H227 Combustible liquid
H315 Causes skin irritation
H318 Causes serious eye damage
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H336 May cause drowsiness or dizziness

Precautionary Statements

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.

Trade & Regulatory

HS Code 29155090
Storage Class 10 - Combustible liquids
WGK (Germany) 2
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