Molekula
Triphenylphosphine oxide
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Triphenylphosphine oxide is a white crystalline solid used as a byproduct in Wittig reactions and as a ligand in organometallic chemistry. Analytical laboratories also use it as a reagent for extracting, separating and spectrophotometrically determining cadmium and mercury in environmental samples. It is stable at ambient temperatures and should be handled with care due to its warning signal word. CAS: 791-28-6, Molecular formula: (C6H5)3PO, Molecular weight: 278.28.
Molekula supplies Triphenylphosphine oxide at ≥ 99% purity in 100 g packs, from £35.40 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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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100 g — £29.50 per pack ex VAT · £35.40 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Melting Point | ≥ 155°C |
| Ash | ≤ 0.5% |
| Loss on Drying | ≤ 0.5% |
| Assay | ≥ 99% |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 36516448 |
| CAS Number | 791-28-6 |
| IUPAC Name | diphenylphosphorylbenzene |
| EC Number | 212-338-8 |
| Molecular Formula | (C6H5)3PO |
| Molecular Weight | 278.28 |
| Exact Mass | 278.0861 |
| SMILES | C1=CC=C(C=C1)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3 |
| InChIKey | FIQMHBFVRAXMOP-UHFFFAOYSA-N |
| InChI | InChI=1S/C18H15OP/c19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18/h1-15H |
| PubChem CID | 13097 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29314900 |
| Tariff Code | 2931499000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- 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
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P501 Dispose of contents/container to an approved waste disposal plant
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- (diphenylphosphoroso)benzene
- diphenylphosphorylbenzene
- PH3PO
- Phosphine oxide, triphenyl-
- phosphorane, triphenyl-, oxide
- TPPO
- Triphenyl phosphorus oxide
- triphenylphosphane oxide
- Triphenylphosphanoxid
- TRIPHENYLPHOSPHINE MONOXIDE
Frequently asked questions
What is triphenylphosphine oxide used for?
It is commonly used as a byproduct in Wittig reactions and as a ligand in organometallic chemistry.
What is the chemical formula and molecular weight?
The formula is (C6H5)3PO with a molecular weight of 278.28 g/mol.
How should triphenylphosphine oxide be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available?
It is supplied to a specification of Assay ≥ 99%; custom purity options may be available upon request.
Can Molekula supply it in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS).
Where can I buy Triphenylphosphine oxide?
Directly from Molekula, which lists Triphenylphosphine oxide in 100 g packs from £35.40 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.