LAB (Linear Alkyl Benzene / Linear Alkylbenzene) • CAS Number: 67774-74-7

Description

Linear alkylbenzene (LAB, CAS 67774-74-7) is a colorless, transparent liquid, a mixture of homologues of linear alkyl-substituted benzenes (commonly with carbon chains C10–C14), and a core raw material for the production of linear alkylbenzene sulfonates (LAS).

Linear Alkylbenzene (LAB)

• CAS Number: 67774-74-7

Here’s a concise technical overview:

🔬 Basic Information

• Chemical name: Linear Alkylbenzene
• General formula: C₆H₅–CₙH₂ₙ₊₁ (typically n = 10–14)
• Molecular weight: ~240–300 g/mol (depending on chain length)
• Appearance: Clear, colorless to slightly yellow liquid
• Odor: Mild aromatic

⚙️ Key Properties

• Boiling range: ~280–320 °C
• Density: ~0.85–0.87 g/cm³ (at 20 °C)
• Flash point: ~130–150 °C
• Solubility: Insoluble in water; soluble in organic solvents
• Viscosity: Low

🧪 Production

• Produced via alkylation of benzene with linear mono-olefins (C10–C14), typically using:
  • HF (hydrofluoric acid) catalyst, or
  • Solid acid catalysts (modern processes)

⚠️ Safety & Handling

• Combustible liquid
• Avoid inhalation and prolonged skin contact
• Use in well-ventilated areas
• Standard PPE recommended

🌱 Environmental Notes

• LAB itself is relatively stable, but its sulfonated derivative (LAS) is biodegradable, making it preferred over older branched surfactants.