Propyl Butyrate

Propyl butyrate is a colorless, transparent liquid with a strong, sweet fruity aroma (reminiscent of pineapple, apricot, or overripe banana peel). Among butyrate esters, it stands out for its high aromatic intensity and longevity, and is frequently paired with ethyl butyrate and isoamyl butyrate to create fruity fragrance bases.

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Product Introduction

Zouping Jinxing Chemical Co., Ltd. is one of the leading manufacturers and suppliers of propyl butyrate in China. If you're going to wholesale bulk propyl butyrate made in China, welcome to get free sample from our factory. All customized products are with high quality and low price.

Basic physical properties

CAS: 105-66-8 (n-Propyl n-butyrate)
Boiling point: 142–143°C (atmospheric pressure)
Melting point: Approx. -95°C
Density: 0.873–0.877 g/cm³ (20°C)
Refractive index: n²⁰ᴅ ≈ 1.400
Solubility: The solubility of propyl butyrate in water is approximately 0.1 g/100 mL (20°C; practically insoluble); it is miscible with ethanol, diethyl ether, acetone, ethyl acetate, hydrocarbons, and most resins; and it is a good solvent for nitrocellulose and acrylic resins.
Flash point: 33–34°C (closed cup); flammable liquid (GHS Category 3)
Vapor pressure: Approx. 0.6 kPa at 20°C; moderately slow evaporation rate
Explosion limits: Approx. 1.0%–6.0% v/v

Primary Uses

Flavoring agent (food/personal care): FEMA 2933, GRAS; pineapple, apricot, banana, and creamy notes; used in trace amounts in baked goods, confectionery, and beverages.
Solvent: Propyl butyrate is used in medium- to high-boiling-point coatings, inks, and adhesives.; offers better leveling properties than ethyl butyrate and a sweeter odor than amyl acetate.
Organic synthesis intermediate: For producing butyrate-based pharmaceuticals, pesticide side chains, and specialty esters.
Extractant: For the separation of fragrance essential oils.

Safety and Physiology

Toxicity: Low toxicity. Oral LD₅₀ (rat) ≈ 3.2 g/kg; high vapor concentrations cause mild anesthesia/dizziness; liquid causes mild eye irritation; minimal percutaneous absorption.
GHS: H226 Flammable liquid and vapor; H319 Causes serious eye irritation.
Storage and Transport: Class 3, PG III; store in a cool, well-ventilated area (≤30°C), kept separate from oxidizing agents and strong bases.

FAQ

Q: Does it have an odor? Is it safe?

A: It has a distinct, sweet, fruity aroma and a mild scent.

It is classified as having low toxicity, with an oral LD₅₀ (rat) of approximately 5–10 g/kg;

it causes mild irritation to the eyes and respiratory tract, and high concentrations of vapor may cause dizziness;

ensure good ventilation during handling and avoid prolonged, direct skin contact.

Q: What are the requirements for storage and transportation?

A: Store in a sealed container in a cool, well-ventilated place away from light and sources of ignition (flash point approx. 37°C; classified as a flammable liquid);

Commonly packaged in 200L galvanized iron drums or glass bottles;

Transported as a standard flammable liquid; not classified as a hazardous chemical (subject to the latest *Catalogue of Hazardous Chemicals*).

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Ethyl Butyrate

Methyl Butyrate