Adipic Acid

Adipic Acid

CAS Number: 124‑04‑9

Synonyms:Adipic acid; 1,4‑butanedicarboxylic acid; hexane‑1,6‑dioic acid

Chemical Formula:C₆H₁₀O₄

Molecular Weight:146.14 g/mol

Product Introduction

A white, odorless crystalline powder, widely used as a precursor for nylon‑6,6 production. Also used in resins, plasticizers, lubricants, polyurethanes, and as food acidulant/buffer (E355)

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Physical & Chemical Properties

Property Value
Appearance White crystalline powder/prisms
Density (solid) ~1.36 g/cm³
Melting Point 151–154 °C
Boiling Point ~265 °C at 100 mm Hg; ~337 °C at atm
Solubility in Water ≈1.4 g/100 mL @15 °C; increases with heat
Solubility in Organics Soluble in methanol, ethanol, acetone; slightly in water
Vapor Pressure ~0.073 mm Hg @18.5 °C
pKa₁ / pKa₂ ~4.43 / 5.41
Log P ~0.08–0.09

Applications

  • Polymer industry: nylon‑6,6, polyurethanes, plasticizers
  • Food & beverage: acidulant, buffer, flavor enhancer in powders, beverages, gelatin
  • Chemical intermediates: in resins, lubricants, chelators, biocides

Safety & Handling

  • Non‑flammable solid. Low hazard; dust may irritate eyes/respiratory tract. GHS Warning (H318). Store sealed below 30 °C in a cool, dry place.

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