Iso Butanol

Iso Butanol

CAS Number:78‑83‑1

Synonyms:Isobutanol; 2‑Methylpropan‑1‑ol; Isobutyl alcohol; IBA

Chemical Formula:C₄H₁₀O

Molecular Weight:74.12 g/mol

Product Introduction

A colorless, flammable liquid with a characteristic sweet, musty odor. It is a branched-chain alcohol widely used as a solvent in coatings, inks, cleaning agents, and as an intermediate in chemical syntheses (e.g., isobutyronitrile) and in biofuel formulations.

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Physical & Chemical Properties

Property Value
Appearance Colorless liquid
Odor Sweet, musty
Density @ 20 °C ~0.802 g/cm³
Melting Point –108 °C
Boiling Point 107.9 °C
Flash Point 28–37 °C
Vapor Pressure @ 20 °C ~9–12 mm Hg
Solubility in Water ~8–9 mL/100 mL
Refractive Index (n₂₀ᴅ) ~1.3959
Vapor Density ~2.5–3 × air
Explosion Limits 1.7–10.9 %
Molecular Weight 74.12 g/mol

Applications

  • Solvent: For paints, coatings, inks, cleaners, hydraulic fluids
  • Chemical intermediate: Synthesis of isobutyronitrile, plasticizers, esters, rubber chemicals
  • Biofuel additive: Used in gasoline/diesel blends for improved performance

Safety Notes

  • Flammable liquid (flash point ~28–37 °C); vapors heavier than air.
  • OSHA PEL: 100 ppm (TWA); IDLH: 1600 ppm.

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