Carbazole (C₁₂H₉N) CAS Number: 86-74-8 Chemical Formula: C₁₂H₉N Molecular Weight: 167.21 g/mol

Carbazole is a high-purity, aromatic heterocyclic organic compound appearing as a white to off-white or light beige crystalline powder or flakes. Renowned for its excellent hole-transporting properties, thermal stability, photochemical reactivity, and strong fluorescence under UV light, carbazole serves as a versatile building block and key intermediate in advanced materials, optoelectronics, and specialty chemicals.

Key Properties

  • Appearance: White to almost white crystalline powder, flakes, or light tan solid
  • Density: Approximately 1.30–1.31 g/cm³
  • Melting Point: 243–246 °C
  • Boiling Point: ~355 °C
  • Solubility: Insoluble in water (<0.1 g/100 mL at 19 °C); soluble in acetone, hot ethanol, chloroform, and other organic solvents
  • Purity Grades Available: ≥97% (GC), ≥98–99% (HPLC) for high-performance applications
  • Other Features: Exhibits strong UV-visible absorption, fluorescence, and phosphorescence; air-sensitive (store under inert gas recommended)

Our carbazole is manufactured to strict specifications with low impurity levels, ensuring consistent performance in demanding electronic and chemical processes.

Primary Applications

Carbazole delivers exceptional value across high-tech and industrial sectors:

  • Organic Light-Emitting Diodes (OLEDs) & Optoelectronics — Core building block for hole-transport layers (HTL), host materials, and emitters in phosphorescent and TADF OLEDs; enhances charge mobility, efficiency, and device stability in displays, lighting, and flexible electronics.
  • Photovoltaic & Solar Cells — Used in dye-sensitized solar cells (DSSCs), organic photovoltaics (OPV), and as a component in electron-donating units for improved light harvesting and power conversion efficiency.
  • Polymers & Conductive Materials — Precursor for polyvinylcarbazole (PVK) and polycarbazole derivatives; applied in photoconductors, electroluminescent polymers, sensors, and high-performance coatings.
  • Dyes, Pigments & Inks — Intermediate for synthesizing vat dyes, anthraquinone dyes, styryl dyes, dioxazine pigments, and specialty inks with enhanced color strength and stability.
  • Pharmaceuticals & Agrochemicals — Building block for derivatives with antibacterial, anticancer, antimalarial, and anti-Alzheimer potential; also used in explosives, insecticides, lubricants, and rubber antioxidants.
  • Other Uses — Analytical reagent, photosensitizers, and precursors for advanced organic synthesis.

Product Advantages

  • High-purity grades (up to ≥99% HPLC) for electronic-grade applications
  • Controlled particle size and low moisture/impurity content for uniform reactivity
  • Reliable bulk supply with consistent batch-to-batch quality
  • Versatile for both research and large-scale industrial production

Frequently Asked Questions (FAQs)

What is carbazole primarily used for in modern applications? Carbazole is most widely used as a key material in OLEDs for hole transport and host layers, as well as in polymers, dyes, and photovoltaic devices due to its excellent optoelectronic properties.

Is carbazole soluble in water? No, carbazole has very low water solubility (<0.1 g/100 mL at 19 °C), but it dissolves well in organic solvents like acetone, hot ethanol, and chloroform.

What purity level is recommended for OLED or electronic applications? High-purity grades (≥98–99% by HPLC) are typically required to minimize impurities that could affect charge transport, device efficiency, or lifetime.

How does carbazole compare to other hole-transport materials? Carbazole offers superior thermal stability, high hole mobility, and tunable functionalization at the nitrogen and 3,6-positions, making it preferable for many OLED hosts and TADF emitters over alternatives like triarylamines in certain designs.

How should carbazole be stored? Store in a cool, dry place under inert gas (e.g., nitrogen) in tightly sealed containers to prevent air oxidation and moisture absorption. Avoid exposure to strong light or heat.

Is carbazole considered hazardous? It is classified as harmful if swallowed or inhaled in large quantities; use appropriate PPE (gloves, dust mask) during handling to avoid skin/eye irritation or dust exposure. Follow standard chemical safety protocols.

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