Normal Butanol

Normal Butanol

CAS Number:71‑36‑3

Synonyms:n‑Butanol; Normal butanol; 1‑Butanol; n‑Butyl alcohol; Butyl alcohol; 1‑Hydroxybutane

Chemical Formula:C₄H₁₀O

Molecular Weight:74.12 g/mol

Product Introduction

A colorless liquid with a mild alcoholic, slightly sweet odor. Supplied at ≥99–99.8% purity (GC- or HPLC-grade) with low water (<0.1%) and non-volatiles. Widely used as a solvent in coatings, paints, adhesives, inks, chemical intermediates, textiles, cosmetics, and as a blendstock in fuels.

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Physical & Chemical Properties

Property Value
Appearance Colorless liquid
Odor Mild, slightly sweet, alcohol-like
Purity ≥99–99.8%; water ≤0.1%, non-volatiles <0.0005%
Density @ 20 °C ~0.81 g/mL
Melting Point –89 to –90 °C
Boiling Point ~116–118 °C
Flash Point (CC) ~29 °C (84 °F)
Vapor Pressure @ 20 °C ~0.58 kPa (~5–6.7 hPa)
Refractive Index (n₂₀ᴅ) ~1.398–1.399
Solubility in Water ~0.6–0.77 g/100 mL
Vapor Density ~2.5–2.55 × air
Log P ~0.79–0.88

Applications

  • Solvent:coatings, inks, adhesives, oils, waxes, resins, rubber
  • Chemical intermediate: esters (e.g., n‑butyl acetate), plasticizers, amino resins
  • Industrial solvent:textiles, cleaning agents, cosmetics, fuel blend
  • Flavor/fragrance precursor; lab standard

Safety Notes

  • Highly flammable (flash ~29 °C, UN 1120); moderate acute toxicity; may irritate eyes/skin; vapors depress CNS. GHS H226/H302/H312/H319. OSHA PEL: TWA 50 ppm; IDLH 1,500 ppm. Use PPE, store in cool, ventilated area away from heat/ignition.

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