Dimethyl Phthalate (DMP), identified by CAS number 131-11-3, is a versatile organic compound belonging to the phthalate ester family. It is synthesized through the esterification of phthalic anhydride with methanol. Characterized as a clear, colorless, oily liquid with a mild, sweet odor, DMP is widely valued for its high solvency and compatibility with a broad range of polymers. Unlike longer-chain phthalates used primarily as bulk plasticizers for PVC, DMP’s specific molecular structure allows it to function effectively as a specialty plasticizer for cellulose acetate, nitrocellulose, and various elastomers. Beyond the plastics industry, it serves as a critical component in the formulation of insect repellents, fragrances, and solid rocket propellants. Its physical properties—including low volatility, high flash point, and excellent thermal stability—make it a reliable intermediate in chemical synthesis. While environmental scrutiny of phthalates exists, DMP remains essential in specific industrial niches where its precise chemical profile provides performance benefits that higher molecular weight alternatives cannot replicate.
* Provides effective plasticization for cellulose esters and various rubbers.
* Functions as an excellent insect repellent in diverse formulations.
* Offers superior solvent power for a wide range of resins.
* Serves as a reliable fixative and solvent in perfumery and cosmetics.
* Improves performance in coatings, lacquers, and inks.
* Valuable component in specialized uses like rocket propellants and safety glass.
* Characterized by a clear appearance and minimal odor.
* Exhibits broad compatibility with numerous polymer systems.
* Appearance: Clear, colorless liquid
* Specific Gravity (20/20°C): 1.190 – 1.194
* Purity, % (min): 99.5
* Moisture, % (max): 0.1
* Acidity (as Phthalic acid), % (max): 0.01
* Color, APHA (max): 10
* Refractive Index (nD20): 1.5150 – 1.5170
* **Plasticizer:** Enhances flexibility and workability in materials like cellulose acetate, nitrocellulose, and synthetic rubbers.
* **Dye Carrier:** Facilitates improved penetration and distribution of dyes in polyester fibers.
* **Perfume Fixative:** Extends the duration and stability of fragrances in perfume formulations.
* **Insect Repellent:** Serves as an effective active ingredient in formulations to repel mosquitoes and other insects.
* **Chemical Solvent:** Acts as a solvent in various organic synthesis processes.
* **Rocket Propellant:** Functions as a key component in solid rocket propellant mixtures.
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