Butyl Propionate

Butyl propionate is a colorless, transparent liquid with a mild fruity aroma (resembling pineapple or pear skin). It is a medium-to-high boiling point solvent widely used in industry among propionate esters. It is miscible with ethanol, diethyl ether, acetone, ethyl acetate, hydrocarbons, and most resins; it possesses excellent dissolving power for nitrocellulose, vinyl chloride copolymers, and acrylic resins, and is stable under light and heat (though it should be kept away from strong acids and strong bases).

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Product Introduction

Zouping Jinxing Chemical Co., Ltd. is one of the leading manufacturers and suppliers of butyl propionate in China. If you're going to wholesale bulk butyl propionate 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: 590-01-2 (n-butyl ester)
Molecular weight: 130.19
Boiling point: 145.5–146.5°C (atmospheric pressure)
Melting point: -89.5°C
Density: 0.875–0.879 g/cm³ (20°C)
Refractive index: n²⁰ᴅ ≈ 1.401
Solubility: The solubility of butyl propionate in water is approximately 0.05 g/100 mL (20°C; practically insoluble); it is miscible with ethanol, diethyl ether, acetone, ethyl acetate, hydrocarbons, and most resins; and it exhibits good dissolving power for nitrocellulose, vinyl chloride copolymers, and acrylic resins.
Flash point: 42–43°C (closed cup); flammable liquid (GHS Category 4); safety profile superior to ethyl acetate/methyl propionate
Vapor pressure: Approx. 0.5 kPa at 20°C; slow evaporation rate
Explosion limits: Approx. 0.8%–6.5% v/v

Primary Uses

Medium-to-high boiling point solvent: Used in coatings (especially baking enamels and coil coatings), inks, and adhesives; Butyl propionate exhibits good leveling properties and resistance to blushing.
Fragrances/Flavors: Used in formulating fruity notes (pineapple, pear, tropical fruit); suitable for use in small quantities in both personal care products and food flavorings (FEMA 2211).
Organic synthesis intermediate: Used to produce butanol derivatives, specialty plasticizers, and side chains for pharmaceuticals and pesticides.
Extractant: Used for separating aromatic essential oils and extracting certain antibiotics.

Safety and Physiology

Toxicity: Low toxicity. Oral LD₅₀ in rats ≈ 5.7 g/kg; causes mild irritation to skin and mucous membranes; high-concentration vapors may cause mild anesthesia or dizziness; liquid contact with eyes causes slight irritation.
Ecology: Biodegradable; low aquatic toxicity.
Storage and Transport: UN 3082 (partial classification) / Class 3 PG III; store in a cool, well-ventilated area; keep separate from oxidizing agents, strong acids, and strong bases.

FAQ

Q: How safe is it? What should be kept in mind during operation?

A: A flammable liquid with low toxicity. Toxicity: LD₅₀ (oral, rat) approximately 4–5 g/kg; mildly irritating to the eyes, skin, and respiratory tract. Protection: Ensure good ventilation during handling; wear safety goggles and chemical-resistant gloves; strictly prohibit open flames and high temperatures.

Q: What are the requirements for storage and transportation?

A: Storage: Store in a tightly sealed container in a cool, dark place; keep at room temperature or refrigerate at 2–8°C. Ensure the container is tightly closed to prevent evaporation. Transport: Regulated as a flammable liquid (Class 3); must bear a flammable label. Although not highly toxic or corrosive, avoid exposure to high temperatures or direct sunlight.

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