DL-Camphorquinone (CQ) Efficient Photoinitiator for Dental Materials with Biocompatibility and High Purity

CAS 10373-78-1 DL-Camphorquinone (CQ) Dental Materials Camphorquinone For 3D Printing

1. Description

DL-Camphorquinone (abbreviated as CQ) is an organic compound and a diketone derivative of camphor. It is a highly specialized photoinitiator, meaning it generates free radicals upon exposure to light of a specific wavelength (typically blue light around 468-470 nm). These free radicals initiate the polymerization (curing) of methacrylate-based resins.

Its name "DL" refers to the racemic mixture of the D and L enantiomers of the molecule. It is a bright yellow, crystalline powder with a characteristic odor and is famously non-toxic, making it ideal for its primary application.

2. Specification

The following table outlines the typical specifications for high-purity Camphorquinone used in dental and medical applications.

3. Key Features

• Efficient Photoinitiator: Its most critical feature. It efficiently absorbs blue light and, when combined with a co-initiator, produces free radicals to cure resins rapidly.
• Biocompatibility: It is considered non-toxic and non-irritating once polymerized, which is a mandatory requirement for materials used in the human body.
• Yellow Color: Its intense yellow color is intrinsic and can slightly tint the final polymer. This must be accounted for in formulations requiring high aesthetic clarity.
• Excellent Solubility: Dissolves well in common organic solvents and resin monomers, ensuring easy and homogeneous incorporation into formulations.
• Synergistic with Amines: Requires a co-initiator (almost always a tertiary amine, e.g., DMAEMA) to function effectively. The amine acts as an electron donor, forming an excited complex that generates the initiating free radicals.

4. Applications

• 1. Dental Materials (Overwhelmingly Primary Use):

  • Composite Fillings: The initiator system for light-cured, tooth-colored dental restoratives.
  • Dental Adhesives: Initiates polymerization of bonding agents that stick fillings to the tooth.
  • Dental Cements: Used for cementing crowns, bridges, and orthodontic brackets.
  • Dental Sealants: Cures the protective plastic coating applied to the grooves of teeth.
  • Denture Base Resins: Used in some light-cured materials for dentures.

• 2. 3D Printing Resins: Used as a photoinitiator in certain biocompatible 3D printing resins for dental and medical models, surgical guides, and prosthetics.

• 3. Specialty Coatings: Occasionally used in niche coating applications where curing with blue light and high biocompatibility are required.