Description

Triethyl Phosphate (TEP) (CAS 78-40-0) is a high-purity organophosphorus compound with the molecular formula C₆H₁₅O₄P. This colorless, odorless liquid is widely utilized as a solvent, flame retardant, and intermediate in organic synthesis. Its exceptional solvency properties make it ideal for resins, cellulose acetate, and nitrocellulose, while its thermal stability ensures reliable performance in high-temperature applications. Triethyl phosphate is rigorously tested for quality, ensuring low moisture content and minimal impurities, making it suitable for sensitive chemical processes. Packaged under inert conditions to preserve integrity, it is available in various quantities to meet both laboratory and industrial demands.

Properties

• CAS Number: 78-40-0
• Complexity: 113
• IUPAC Name: triethyl phosphate
• InChI: InChI=1S/C6H15O4P/c1-4-8-11(7,9-5-2)10-6-3/h4-6H2,1-3H3
• InChI Key: DQWPFSLDHJDLRL-UHFFFAOYSA-N
• LogP: log Kow = 0.80
• Exact Mass: 182.07079595
• Molecular Formula: C6H15O4P
• Molecular Weight: 182.15
• SMILES: CCOP(=O)(OCC)OCC
• Topological: 44.8
• Monoisotopic Mass: 182.07079595
• Physical Description: Triethyl phosphate appears as a colorless, corrosive liquid. Combustible. Slowly dissolves in water and sinks in water. Severely irritates skin, eyes and mucous membranes.
• Color/Form: Liquid
• Odor: Mild
• Boiling Point: 419 to 421 °F at 760 mmHg ; 217 °F at 25 mmHg
• Melting Point: -69.5 °F
• Flash Point: 240 °F
• Solubility: Soluble, slight decomposition
• Density: 1.068 – Denser than water; will sink
• Vapor Density: 6.28 – Heavier than air; will sink
• Vapor Pressure: 1 mmHg at 103.3 °F
• Henry’s Law Constant: Henry’s Law constant = 3.60X10-8 atm-cu m/mol at 20 °C
• Stability/Shelf Life: Very stable at ordinary temperatures.
• Autoignition Temperature: 845 °F
• Viscosity: 1.46 cSt at 25 °C
• Surface Tension: 3.82X10-2 N/m at 216 K
• Refractive Index: Index of refraction = 1.4053 at 20 °C
• Synonyms: TRIETHYL PHOSPHATE, 78-40-0, Triethylphosphate, Phosphoric acid, triethyl ester, Tris(ethyl) phosphate, Triethylfosfat, Ethyl phosphate ((EtO)3PO), Phosphoric Acid Triethyl Ester, Triethylfosfat [Czech], o-Phosphoric acid triethyl ester, NSC 2677, CCRIS 4882, HSDB 2561, UNII-QIH4K96K7J, EINECS 201-114-5, QIH4K96K7J, BRN 1705772, DTXSID8026228, CHEBI:45927, AI3-00653, NSC-2677, (C2H5O)3PO, DTXCID806228, TRIETHYL PHOSPHATE [MI], TRIETHYL PHOSPHATE [HSDB], EC 201-114-5, 4-01-00-01339 (Beilstein Handbook Reference), TRIETHYL PHOSPHATE [WHO-DD], LEVAGARD TEP, ETHYL ACID PHOSPHATE, TRIETHYL PHOSPHATE [INCI], dqwpfsldhjdlrl-uhfffaoysa-n, ethyl phosphate, ethyl phosphate (van), inchi=1/c6h15o4p/c1-4-8-11(7,9-5-2)10-6-3/h4-6h2,1-3h, Triethoxyphosphine oxide, TEP, MFCD00009077, CAS-78-40-0, Triethyl phosphate,C6H15O4P,78-40-0, C6H15O4P, Triethyl phosphate, 99%, SCHEMBL21887, MLS002152947, SCHEMBL517882, WLN: 2OPO&O2&O2, SCHEMBL5878647, CHEMBL1236251, NSC2677, HMS3039O10, MSK28207, Tox21_202463, Tox21_303106, AKOS000120082, CS-W017130, DB03347, SB66379, Triethyl phosphate, analytical standard, NCGC00091606-01, NCGC00091606-02, NCGC00091606-03, NCGC00256988-01, NCGC00260012-01, BP-30153, BP-31112, SMR001224539, MSK28207-1000, NS00009400, P0270, EN300-19166, Triethyl phosphate, ReagentPlus(R), >=99.8%, 1ST28207-1000, Q410382, Triethyl phosphate, Vetec(TM) reagent grade, 98%, Triethyl phosphate Solution in Acetone, 1000?g/mL, Triethyl phosphate Solution in Acetone, 1000mug/mL, F0001-2052, Z104473010, 201-114-5

Application

Triethyl phosphate is extensively used as a flame retardant in plastics, textiles, and construction materials due to its phosphorus content. It serves as a solvent and plasticizer in cellulose-based products, enhancing flexibility and durability. In organic synthesis, TEP acts as a key intermediate for producing pharmaceuticals, agrochemicals, and other specialty chemicals. Its stability and low toxicity also make it suitable for gas chromatography applications.

Safety and Hazards

GHS Hazard Statements

• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]
• H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]
• H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]

Precautionary Statements

• P203, P260, P261, P264, P264+P265, P270, P271, P280, P301+P317, P304+P340, P305+P351+P338, P308+P316, P318, P319, P330, P337+P317, P403+P233, P405, and P501

Hazard Classes and Categories

• Acute toxicity – Category 4
• Serious eye damage/eye irritation – Category 2
• Reproductive toxicity – Category 2
• Specific target organ toxicity – Single exposure – Category 2 , Category 3

If you are interested or have any questions, please contact us at support@atomfair.com

Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.