Phosphotrimethylphenol (or Trimethylphenyl Phosphate, abbreviated as TCP) boasts a multitude of applications across various industries:

1. Flame Retardant: TCP serves as a crucial plasticizer and flame retardant additive in the production of vinyl esters, nitrocellulose, polyvinyl chloride, cable rubber products, and flexible polyurethane foam plastics. It enhances the wear resistance, weatherability, mold resistance, radiation resistance, and electrical properties of polymers. Furthermore, it is utilized as a plasticizer for epoxy resin adhesives, imparting flame-retardant properties.
2. Solvent: As a highly effective solvent with robust solvency, TCP can dissolve numerous organic compounds and dyes. It finds extensive application in the manufacture of dyes, paints, inks, and cleaning agents.
3. Pharmaceutical Formulations: In the pharmaceutical sector, TCP acts as an efficient solubilizer and enhancer, improving the stability and bioavailability of drugs. It also functions as a dispersant and emulsifier in colloidal and emulsion formulations, stabilizing drug dispersion systems and enhancing drug absorption efficiency.
4. Metal Cleaning Agent: TCP possesses high surface activity and solubility, effectively removing oxide films and grease from metal surfaces, such as aluminum alloy, ensuring a clean and bright appearance. Consequently, it is frequently employed as a metal cleaning agent, particularly for aluminum alloy treatment.
5. Other Applications: TCP also finds use as an analytical reagent and solvent for nitrocellulose. Additionally, it can be blended into gasoline as a vehicular fuel component, enhancing fuel performance and quality, while reducing emissions of primary pollutants like carbon monoxide and hydrocarbons.

However, it is important to note that TCP may pose certain health and environmental risks. It can enter the human body through inhalation, ingestion, or dermal absorption, causing severe irritation to mucous membranes, the upper respiratory tract, eyes, and skin. Therefore, appropriate protective measures must be taken when handling TCP to ensure the safety of personnel and the environment.

In summary, Phosphotrimethylphenol boasts a wide range of applications and significant commercial value across multiple industries, yet its potential safety hazards cannot be overlooked.