Molekula
Triethyl phosphate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Triethyl phosphate is a colorless, flammable liquid phosphate ester widely used as a plasticizer, solvent, and flame retardant in industrial applications, including adhesives, coatings, and hydraulic fluids. It also serves as a reagent in organic synthesis and a stabilizer in some pharmaceutical formulations. CAS 78-40-0, molecular formula (C2H5O)3PO, molecular weight 182.15 g/mol. Store at ambient temperatures. Signal word: Warning. Molekula supplies triethyl phosphate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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500 g — £46.40 per pack ex VAT · £55.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Colorless transparent liquid |
| Density | 1.069-1.073 (20°C) |
| Refractive Index | 1.405-1.407 |
| Water | ≤ 0.2% |
| Assay | ≥ 99.5% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 115 °C |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Liquid |
| Odour | Mild |
| Melting Point | -56.4 °C |
| Boiling Point | 215.5 °C |
| Density | 1.07 (relative, water = 1) |
| Water Solubility | 500 g/L at 25 °C |
| Solubility (other solvents) | Soluble in diethyl ether, benzene; very soluble in ethanol; slightly soluble in chloroform |
| Vapour Pressure | 20 Pa at 20 °C |
| Refractive Index | 1.4053 |
| log P (octanol/water) | 0.80 |
Source: PubChem CID 6535 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 33355501 |
| CAS Number | 78-40-0 |
| IUPAC Name | triethyl phosphate |
| EC Number | 201-114-5 |
| Molecular Formula | (C2H5O)3PO |
| Molecular Weight | 182.15 |
| Exact Mass | 182.0708 |
| SMILES | CCOP(=O)(OCC)OCC |
| InChIKey | DQWPFSLDHJDLRL-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H15O4P/c1-4-8-11(7,9-5-2)10-6-3/h4-6H2,1-3H3 |
| PubChem CID | 6535 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29199050 |
| Tariff Code | 2919900050 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H319 Causes serious eye irritation
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Ethyl phosphate
- Ethyl phosphate ((EtO)3PO)
- o-Phosphoric acid triethyl ester
- O,O,O-Triethylphosphate
- Phosphoric acid, triethyl ester
- TEP
- Triethoxyphosphine oxide
- Triethylfosfat
- Tris(ethyl) phosphate
- WLN: 2OPO&O2&O2
Frequently asked questions
What is triethyl phosphate commonly used for?
Triethyl phosphate is primarily used as a plasticizer, flame retardant, and solvent in industrial applications, as well as in the synthesis of pharmaceuticals and pesticides.
What is the chemical formula and molecular weight of triethyl phosphate?
The chemical formula is **(C₂H₅O)₃PO** and the molecular weight is **182.15 g/mol**.
How should triethyl phosphate be stored?
Store triethyl phosphate in a tightly sealed container at **ambient temperature**, away from ignition sources and incompatible substances.
What grades or purity levels of triethyl phosphate does Molekula supply?
Molekula supplies triethyl phosphate in **technical and reagent grades**, with purity levels typically ≥98%.
Can Molekula supply triethyl phosphate in bulk quantities?
Yes, Molekula can provide triethyl phosphate in **bulk quantities** (e.g., drums or IBCs) for industrial customers—please contact us for specific packaging options.
What documentation comes with an order of triethyl phosphate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.