n-Butyraldehyde

n-Butyraldehyde

CAS Number: 123‑72‑8

Synonyms: n-Butyraldehyde; Butanal; n-Butanal; Butyl aldehyde

Chemical Formula:C₄H₈O

Molecular Weight:72.11 g/mol

Product Introduction

A colorless, flammable liquid with a pungent aldehyde odor, used as an intermediate in plasticizer production, solvents, pharmaceuticals, and resin synthesis.

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Physical & Chemical Properties

Property Value
Appearance Colorless liquid
Odor Pungent, sharp aldehyde smell
Density @ 20 °C ~0.802 g/mL
Melting Point –96.9 °C
Boiling Point ~74.8–75 °C
Flash Point <10 °C
Vapor Pressure @ 20 °C ~90 mm Hg
Refractive Index (n₂₀ᴅ) ~1.380
Solubility in Water ~7.6 g/100 mL
Vapor Density ~2.5 × air
Explosion Limits ~1.9–12.5%

Applications

  • Plasticizer and resin precursor (e.g., polyvinyl butyral)
  • Intermediate: solvents, polymers, chemical manufacture
  • Pharmaceutical/agrochemical synthesis

Safety & Hazards

  • Highly flammable (flash <10 °C). GHS: H225/H319. Vapors heavier than air, causes eye/skin irritation and CNS effects. OSHA PEL 100 ppm; IDLH 2,300 ppm. Use PPE, keep away from ignition and oxidizers.

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