2-Ethylhexyl Diphenyl Phosphate TCI P1021

2-Ethylhexyl Diphenyl Phosphate from TCI (product code P1021, CAS 1241-94-7) is a mixed aryl-alkyl phosphate ester. Its phosphorus atom carries two phenyl groups and one 2-ethylhexyl group. In industry, the compound is known as both a plasticizer and a flame retardant. TCI lists it under Battery Additives, which reflects its use in battery electrolyte research. There it serves as a flame-retardant additive that helps improve the safety of lithium-ion cells and other battery systems. In the laboratory, researchers use it to study how electrolyte formulations can be made less flammable without giving up cell performance.

Phosphate esters are chosen as flame-retardant additives because they break down under heat into phosphorus-based radicals. These radicals capture the radicals that carry combustion reactions in the gas phase, which slows or suppresses burning. This compound pairs aromatic groups with a branched alkyl chain, which gives it a good balance between solubility in organic carbonate solvents and flame-retardant effect. It is a liquid of moderate viscosity, so it blends easily into electrolyte formulations and polymer matrices. These traits make it practical for researchers who need a flame retardant that mixes well with standard battery solvents and polymer systems.

In Indonesia, battery and energy storage research is growing quickly alongside the electric vehicle ecosystem and the nickel processing industry. This material is relevant to materials science laboratories at universities, research institutions, and industrial R&D centers working on safer electrolyte systems. Researchers developing lithium-ion cell prototypes, testing electrolyte flammability, or studying flame-retardant polymer composites can use it as a reference additive. It also supports academic projects that compare phosphate-based safety additives in local battery development programs.

• Flame-retardant electrolyte additive studies: the phosphate ester structure releases phosphorus-based radicals on heating, so researchers can test how it lowers the flammability of carbonate-based lithium-ion electrolytes.
• Lithium-ion cell safety research: researchers can add it to experimental electrolyte formulations to see how flame-retardant additives affect cell safety behavior alongside electrochemical performance.
• Electrolyte formulation and compatibility testing: its balanced aromatic and branched alkyl structure gives good solubility in organic carbonate solvents, which makes it suitable for blending and miscibility studies.
• Flame-retardant polymer and gel electrolyte development: as a liquid of moderate viscosity that is known as a plasticizer, it blends readily into polymer matrices for flame-retardant composite research.
• Comparative studies of phosphate-based additives: its mixed aryl-alkyl structure makes it a useful reference compound when comparing different phosphate esters for flame retardancy and solvent compatibility.

Store 2-Ethylhexyl Diphenyl Phosphate in its original, tightly sealed container in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible materials such as strong oxidizing agents. Keep the container closed when not in use to prevent contamination and moisture uptake, which matters for battery electrolyte work. Handle the material in a fume hood or well-ventilated workspace. Wear suitable personal protective equipment, including chemical-resistant gloves, safety glasses, and a laboratory coat. Avoid contact with skin and eyes and avoid breathing vapors. Label all transferred portions clearly. Always read the TCI Safety Data Sheet before use, and dispose of waste in line with institutional and local regulations.

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