Molekula
Triethyl phosphite
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 phosphite is a colorless liquid used as a reagent in organic synthesis, particularly in the preparation of phosphorus-containing compounds and as a ligand in catalysis. It is also employed in the production of pesticides and flame retardants. CAS: 122-52-1, Molecular Formula: C6H15O3P, Molecular Weight: 166.16 g/mol, Storage: Ambient, Signal Word: Warning. Molekula supplies Triethyl phosphite 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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 g — £48.20 per pack ex VAT · £57.84 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Colourless liquid |
| Impurity | ≤1.0% |
| Triethylamine | ≤0.3% |
| Triethyl phosphate | ≤0.5% |
| Triethyl phosphite | ≥99.0% |
| Diethyl phosphite | ≤0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 54 °C |
| Transport Class | 3 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odour | Pungent odor |
| Melting Point | -112 °C |
| Boiling Point | 157.9 °C |
| Density | 0.97 (relative, water = 1) |
| Solubility (other solvents) | Soluble in alcohol, ether |
| Vapour Pressure | 1.95 mmHg at 20 °C |
| Refractive Index | 1.4127 |
Source: PubChem CID 31215 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 89968064 |
| CAS Number | 122-52-1 |
| IUPAC Name | triethyl phosphite |
| EC Number | 204-552-5 |
| Molecular Formula | C6H15O3P |
| Molecular Weight | 166.16 |
| Exact Mass | 166.0759 |
| SMILES | CCOP(OCC)OCC |
| InChIKey | BDZBKCUKTQZUTL-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H15O3P/c1-4-7-10(8-5-2)9-6-3/h4-6H2,1-3H3 |
| PubChem CID | 31215 |
| UN Number | UN2323 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2920.24.0000 |
| Tariff Code | 2920240000 |
Safety & GHS
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Flammable
GHS02
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Health Hazard
GHS07
Hazard statements
- H226 Flammable liquid and vapour
- H302 Harmful if swallowed
- H317 May cause an allergic skin reaction
- H332 Harmful if inhaled
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P273 Avoid release to the environment
- 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
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- (EtO)3P
- Ethyl phosphite, (EtO)3P
- Fosforyn trojetylowy
- P(OEt)3
- Phosphorous acid, triethyl ester
- Phosphorus ether
- Triethoxyphosphine
- Triethoxyphosphine-d15
- TRIS(ETHOXY)PHOSPHINE
Frequently asked questions
What is triethyl phosphite used for?
Triethyl phosphite is commonly used as a reagent in organic synthesis, particularly in the preparation of phosphorus-containing compounds and as a ligand in catalysis.
What is the chemical formula and molecular weight of triethyl phosphite?
The chemical formula is C6H15O3P and the molecular weight is 166.16 g/mol.
How should triethyl phosphite be stored?
Triethyl phosphite should be stored at ambient temperature, away from moisture and incompatible materials.
What grade is available for triethyl phosphite?
Triethyl phosphite is available in technical grade; specific higher grades may be available upon request.
Can Molekula supply triethyl phosphite in bulk?
Yes, Molekula can supply triethyl phosphite in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a purchase of triethyl phosphite?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.
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.