High-Purity Solvents, Ketones

Benzophenone

Benzophenone, with the chemical formula C13H10O and CAS number 119-61-9, is a fundamental organic compound belonging to the diaryl ketone family. This white crystalline solid possesses a characteristic sweet, rose-like odor and is practically insoluble in water but highly soluble in organic solvents such as ethanol and ether. Primarily recognized for its role as a photoinitiator in ultraviolet curing applications, benzophenone absorbs UV light and generates free radicals that initiate polymerization in coatings, inks, and adhesives. Beyond industrial manufacturing, it serves as a critical ultraviolet stabilizer in plastics and clear packaging to prevent degradation from sunlight exposure. Furthermore, benzophenone acts as a versatile building block in the synthesis of pharmaceuticals, agrochemicals, and various fine chemicals. In the fragrance industry, it is utilized as a fixative to enhance the longevity of scents. Due to its unique photochemical properties and chemical stability, benzophenone remains a vital essential component in modern polymer chemistry.

Attributes

Key Features and Benefits

Exceptional photoinitiating capability for rapid ultraviolet curing processes across industrial sectors.
High solubility in a diverse range of organic monomers, prepolymers, and common industrial solvents.
Strong absorption of ultraviolet radiation, specifically within the UV-A and UV-B spectrum ranges.
Superior chemical stability under standard storage conditions ensuring long-term shelf life for manufacturers.
Effective fixative properties for fragrance retention in personal care and household cleaning products.
Versatile molecular structure allowing for easy chemical modification in specialized synthesis laboratories.
Ability to act as a potent radical generator upon irradiation with specific UV wavelengths.
Distinct clear appearance.

Specifications

Technical Highlights

Molecular weight is approximately 182.22 grams per mole for precise chemical calculations.
Melting point ranges between 47 and 49 degrees Celsius for thermal processing requirements.
Boiling point is approximately 305 degrees Celsius at standard atmospheric pressure for distillation.
Flash point is 138 degrees Celsius, indicating moderate thermal stability and safe handling.
Acts as a Type II photoinitiator requiring a hydrogen-donating co-initiator like tertiary amines.
Refractive index is 1.6077, contributing to its distinct optical characteristics in thin films.
Vapour pressure is extremely low at room temperature, significantly reducing inhalation exposure risks.
High purity levels.
Stable.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Primary photoinitiator in UV-curable inks used for high-speed commercial printing presses and packaging.
UV stabilizer for clear plastic packaging to protect sensitive contents from solar light damage.
Essential intermediate in the synthesis of antihistamines, hypnotics, and other critical pharmaceutical drugs.
Active component in agricultural chemicals for pest control and broad-spectrum crop protection strategies.
Important fragrance fixative in soaps, perfumes, and various consumer cosmetic formulations for scent.
Additive in protective coatings for wooden furniture, automotive parts, and structural metal surfaces.
Manufacturing of specialty elastomers and cross-linked polymer systems for the aerospace industry.
Optical materials.