1. Product Information
Product name: Triisobutyl Phosphate
CAS No.:126-71-6EINECS No.: 204-798-3
Chemical Formula: C₁₂H₂₇O₄P
Molecular Weight: 266.32
Synonyms:TIBP, Phosphoric acid tris(2-methylpropyl) ester, Tris(2-methylpropyl) phosphate
Appearance: Colorless transparent liquid with characteristic odor.
Product Type: Organic phosphate ester, silicone-free defoamer, industrial chemical additive.2. Physical & Chemical Properties
Density (20 °C) 0.964-0.968 g/cm³
Melting Point <-60 °C
Boiling Point 264-272 °C (101.3 kPa, partial decomposition)
Flash Point (Closed Cup) 132 °CAuto‑ignition Temperature 430 °C
Vapor Pressure (20 °C) 0.002 hPa
Solubility in Water 0.26 g/L (slightly soluble); miscible with alcohols, ethers and most organic solvents
Refractive Index n₂₀ᴰ 1.418-1.420
Stability Stable under normal conditions. Incompatible with strong oxidizing agents, strong bases. Combustible liquid.3. Quality Specification (Industrial Grade)
| Test Item | Specification |
|---|---|
| Assay (GC) | ≥99.0 % |
| Color (Pt‑Co / Hazen) | ≤20 |
| Acidity (as H₃PO₄) | ≤0.05 % |
| Moisture | ≤0.10 % |
4. Applications
Defoamer: Silicone-free foam suppressant for water‑based coatings, paints, adhesives and emulsion polymerization systems.
Textile industry: Auxiliary agent for textile dyeing and finishing bath to eliminate foam.
Industrial additives: Used in detergents, agrochemical formulations, oil-field chemicals and synthetic lubricants.
Organic synthesis: Phosphorus‑containing intermediate for fine chemical manufacturing.5. Packaging, Storage & Transportation
- Packaging: 200 L steel drum, net weight 190 kg/drum; IBC tank available.
- Storage: Keep container tightly closed. Store in cool, dry and ventilated warehouse. Keep away from heat source, open flame and strong oxidants.
- Transport: Ordinary combustible liquid. Prevent leakage, avoid direct sunlight and rain.6. Safety Remarks (Refer to SDS for full details)
- May cause irritation to eyes, skin and respiratory tract. Wear chemical‑resistant gloves and safety goggles during operation.
- In case of contact, rinse with plenty of clean water.
- Fire‑extinguishing media: foam, dry powder, carbon dioxide, water spray.




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