Dibenzoylmethane has the CAS number 120 - 46 - 7. It is a white or near - white crystalline powder. The molecular formula of dibenzoylmethane is C₁₅H₁₂O₂, and its molecular weight is approximately 224.26 g/mol. It has a melting point of 77 - 79 °C and is insoluble in water but soluble in common organic solvents such as ethanol, ether, and chloroform. Our factory supplies high - quality dibenzoylmethane with strict quality control, ensuring that it meets the international standards in terms of purity and other physical and chemical properties.
UV Absorber: Dibenzoylmethane is widely used as a UV absorber in the polymer industry. It can effectively absorb ultraviolet light in the range of 290 - 340 nm, protecting polymers such as polyvinyl chloride (PVC), polypropylene (PP), and polyethylene (PE) from the damage of UV radiation. This helps to prevent the polymer materials from aging, discoloring, and losing mechanical properties, thereby extending their service life.
Intermediate in Organic Synthesis: It serves as an important intermediate in organic synthesis. It can be used to synthesize a variety of heterocyclic compounds, which have potential applications in the fields of pharmaceuticals, pesticides, and dyes.
Additive in Cosmetics: In the cosmetic industry, dibenzoylmethane can be added to sunscreens and other skin - care products. It helps to protect the skin from UV - induced damage, such as sunburn, premature aging, and skin cancer.
In Polymer Industry: When used as a UV absorber in polymers, dibenzoylmethane is usually added during the polymer processing stage. The recommended dosage is 0.1 - 1.0% (weight percentage) depending on the type of polymer, the application environment, and the required level of UV protection. It can be mixed with other additives such as antioxidants and heat stabilizers to achieve better performance.
In Organic Synthesis: In organic synthesis, dibenzoylmethane should be stored in a cool, dry place away from light and heat. When using it as a reactant, appropriate reaction conditions such as solvents, catalysts, and reaction temperatures should be carefully selected according to the specific synthesis route.
In Cosmetics: In cosmetics, dibenzoylmethane should be formulated with other ingredients in a proper ratio. It is usually dissolved in oil - based carriers and then mixed with other cosmetic components. The concentration in cosmetics is generally controlled within a safe range to ensure product safety and effectiveness.
Case 1: PVC Pipes
A PVC pipe manufacturing company used our factory - supplied dibenzoylmethane as a UV absorber. Before using it, the PVC pipes exposed to sunlight for a long time would turn yellow and become brittle, with a significant decrease in mechanical strength. After adding dibenzoylmethane at a dosage of 0.3% during the extrusion process, the PVC pipes showed excellent UV resistance. Even after being exposed to sunlight for more than 6 months, there was no obvious discoloration or decrease in mechanical properties, which greatly improved the product quality and market competitiveness.
Case 2: Sunscreen Products
A cosmetic company incorporated dibenzoylmethane into their sunscreen products. Through clinical trials, it was found that the sunscreen products could effectively protect the skin from UV - induced damage. Volunteers who used the sunscreen with dibenzoylmethane had significantly less sunburn and skin redness compared to those using the placebo. The product received positive feedback from consumers and achieved good sales results.
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