Indan

November 7, 2025

Pharmacopoeial Name: Indan
Chemical Name: 1,2-Hydrindene
CAS No.: [496-11-7]

Description
Indan is a colorless to pale yellow liquid with a characteristic aromatic odor. It is a bicyclic hydrocarbon consisting of a benzene ring fused with a cyclopentane ring. Indan serves as an important intermediate in organic synthesis, widely used in the pharmaceutical, fragrance, and fine chemical industries.
Product Specifications

Appearance The micro yellow to
yellow-brown liquid

Assay(GC) ≥99%

Molecular Formula C9H10

Molecular Weight 118.18

Product Characteristics

Melting Point	−51 °C (lit.)
Boiling Point	176 °C (lit.)
Density	0.965 g/mL at 25 °C (lit.)
Vapor Pressure	1.5 at 25 °C (extrapolated, Ambrose and Sprake, 1975)
Refractive Index	n²⁰ᴰ 1.537 (lit.)
Flash Point	50 °C
Storage Conditions	Sealed in a dry place, room temperature
Solubility	Soluble in alcohol, ether (Weast, 1986), and many aliphatic hydrocarbons (hexane, pentane), as well as in aromatic hydrocarbons (benzene)
Acidity Coefficient (pKa)	> 14 (Schwarzenbach et al., 1993)

Applications
- Pharmaceutical intermediates – used in the synthesis of anti-inflammatory, cardiovascular, and neuroactive compounds.
- Fragrance & flavor chemicals – precursor to aromatic compounds and musk-type fragrances.
- Fine chemicals & specialty materials – used as a starting material for indene derivatives, indanones, indanols, and polymers.
- Research reagent – employed in laboratory organic synthesis and catalysis studies.
- Fuel additive & solvent component (in some research contexts) – improves combustion or serves as a hydrocarbon model compound.
Packaging
- - Glass bottle: 100 mL, 500 mL, 1 L (for laboratory use).
  - Metal drum or aluminum container: 25 kg / 50 kg net weight (for bulk supply).
  - Sealed under nitrogen protection or vacuum-sealed to prevent oxidation and contamination.
  - Customized packaging available on request.