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Triethyl Phosphate (TEP) is an organophosphorus compound widely used as a solvent, flame retardant, plasticizer, and intermediate in chemical synthesis.
CAS Number
78-40-0
Synonyms
TEP,Phosphoric acid triethyl ester,Triethoxyphosphine oxide,Ethyl phosphate, Triethyl orthophosphate,O,O,O-Triethyl phosphate
Introduction
Definition of Triethyl Phosphate (TEP)
Historical background and discovery
General chemical classification (organophosphates)
Overview of uses across industries
Importance in chemistry and manufacturing
Chemical Structure and Properties
Molecular formula: C₆H₁₅O₄P
Molecular weight: 182.16 g/mol
IUPAC name: Triethyl phosphate
Structural diagram and bond configuration
Functional groups and electron distribution
Synthesis and Production Methods
Industrial synthesis via reaction of phosphorus oxychloride with ethanol
Alternative synthesis using P₂O₅ and ethanol under catalytic conditions
Laboratory-scale vs commercial-scale production
Reaction conditions: temperature, catalysts, solvents
Yields and purity levels
Analytical Characterization Techniques
Spectroscopy: IR, NMR (¹H, ¹³C, ³¹P), and UV-Vis
Chromatography: GC, HPLC
Mass spectrometry analysis
Elemental analysis and purity testing
Thermal analysis: TGA, DSC
Physical and Chemical Behavior
Physical state, appearance, and odor
Boiling and melting points
Solubility in water and organic solvents
Vapor pressure, refractive index, density
Hydrolysis and thermal decomposition behavior
Industrial Applications
Flame retardants in plastics, textiles, and coatings
Solvent in chemical synthesis and polymer processing
Intermediate in organophosphorus chemistry
Plasticizer in rubber and PVC formulations
Catalysis and polymerization reactions
Use in Flame Retardants
Mechanism of action: char formation and flame inhibition
Synergy with other flame retardants (e.g., antimony trioxide)
Use in polyurethane foams and electronics
Regulations in fire-resistant materials
Performance testing (LOI, UL-94, Cone Calorimeter)
Use as a Solvent and Plasticizer
Solubility parameters and compatibility
Use in nitrocellulose, resins, and lacquers
Effects on flexibility, toughness, and transparency
Interaction with other plasticizers
Environmental considerations and volatility
Role in Organophosphorus Chemistry
Use as a phosphorylating agent
Synthesis of pesticides, nerve agents, and pharmaceuticals
Intermediate in preparation of phosphoric esters
Reaction with nucleophiles and electrophiles
Catalytic applications in organophosphorus synthesis
Biological and Pharmaceutical Applications
Potential as a drug carrier or excipient
Metabolism and bioactivity studies
Biomedical implications of organophosphate exposure
Research on neurotoxicity and enzyme inhibition
Studies on controlled release systems
SAFETY INFORMATION ABOUT TRIETHYL PHOSPATE
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
