Diphenylphosphine Oxide (DPO) CAS 4559-70-0: Comprehensive Technical Guide
Table of Contents
1. Product Overview & Specifications
| Parameter | Value |
|---|---|
| Chemical Name | Diphenylphosphine Oxide (DPO) |
| CAS Number | 4559-70-0 |
| Molecular Formula | C12H11OP |
| Molecular Weight | 202.18 g/mol |
| Appearance | White crystalline solid |
| Melting Point | 56–57°C |
| Boiling Point | 377°C |
| Flash Point | 153°C |
| Solubility | Low water solubility; soluble in organic solvents |
| Storage | Sealed, dry environment protected from light |
2. Key Applications
Organic Synthesis
- Phosphine Ligand Precursor: Synthesizes chiral ligands (e.g., diphenylarylphosphines) for asymmetric catalysis.
- Wittig-Horner Reagent: Generates α,β-unsaturated carbonyl compounds via olefination reactions.
- Fluorinated Compound Synthesis: Reacts with ClCF2CO2Et to produce difluoromethyl derivatives.
Polymer Chemistry
- Flame Retardant Intermediate: Used in halogen-free flame retardants for engineering plastics.
- OLED Material Production: Key precursor for electronic materials in display technologies.
3. Operational Guidelines
Reaction Optimization
- Catalytic Additions: Use transition metal catalysts (e.g., Pd, Cu) for stereospecific alkyne/alkene additions.
- Solvent-Free Reactions: Microwave-assisted reactions achieve 85–92% yield without solvents.
Purification
- Recrystallize from ethanol/water mixtures (3:1 ratio).
- Chromatographic purification using silica gel (hexane/ethyl acetate).
4. Industry Case Studies
Case 1: Flame Retardant Development
Client: Major Japanese Chemical Manufacturer
Application: Halogen-free flame retardant for polyamide 6.6
Result: Achieved UL94 V-0 rating with 18% loading; reduced smoke emission by 40%.
Case 2: Pharmaceutical Intermediate Synthesis
Client:
Application: Synthesis of kinase inhibitor intermediates
Result: Improved reaction yield from 68% to 89% using DPO-mediated Horner-Wadsworth-Emmons reaction.
5. Safety & Compliance
| Hazard Code | Description | Preventive Measures |
|---|---|---|
| H302 | Harmful if swallowed | Use PPE; avoid ingestion |
| H315 | Skin irritation | Wear nitrile gloves |
| H319 | Eye damage | Safety goggles required |
6. Supplier Comparison
| Supplier | Purity | Packaging | Lead Time |
|---|---|---|---|
| Shanghai Guandao Bio | ≥98% | 5g–1kg | 2–3 weeks |
| Yantai JiuMu Chem | ≥99% | 100g–5kg | 1 week |
| Otsuka Chemical | ≥98.5% | 25g–500g | 4 weeks |
7. Contact for Technical Support
For product specifications, bulk pricing, or technical consultation:
Email: info@vivalr.com
Tel: (86) 15866781826



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