- ▸ Antifoam/defoaming agent for polyurethane and coating systems
- ▸ Controls air entrainment in resin and mortar mixes
- ▸ Acts as a wetting/viscosity aid in some PU formulations
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Triisobutyl phosphate (TIBP) is a low-viscosity trialkyl phosphate used mainly as an anti-foam and air-detraining agent (notably in concrete, gypsum and coatings), a solvent, and a phosphorus contributor for flame performance. Identity: CAS 126-71-6.
What it is
Triisobutyl phosphate (CAS 126-71-6) is a clear, low-viscosity liquid trialkyl phosphate. Its branched isobutyl chains and low surface tension make it an effective defoamer/air detrainer.
How it performs in fire
It functions as an anti-foam and air-detraining agent, a solvent and a wetting aid, with a phosphorus-based FR contribution. In construction it controls entrained air in concrete and gypsum slurries.
Applications
TIBP is used as an anti-foam / air-detrainer and solvent in concrete and gypsum, coatings and industrial fluids, with a flame-retardant phosphate contribution. Compare TBP.
Forms, grades and handling
TIBP is supplied as a clear, low-viscosity liquid in drums, IBCs and bulk. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Handle per the current Safety Data Sheet (SDS), and confirm regulatory status and restrictions for your market and end use — flame-retardant regulation evolves. Each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources Triisobutyl Phosphate direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your polymer or system, the fire test you must pass, your maximum loading, and whether the application must be halogen-free, and we will quote the right grade. See the full range and selection logic in the flame retardants guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Anti-foam / solvent / FR phosphate (trialkyl phosphate) |
| Flame-retardant type | Trialkyl phosphate |
| Role in fire performance | Anti-foam / solvent; phosphorus contribution |
| CAS Number | 126-71-6 |
| Molecular Formula | C12H27O4P |
| Molecular Weight | 266.31 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 204-798-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is triisobutyl phosphate (TIBP) used for?
Triisobutyl phosphate (CAS 126-71-6) is a low-viscosity trialkyl phosphate used as an anti-foam and air-detraining agent (in concrete, gypsum and coatings), a solvent, and a flame-retardant-contributing phosphate.
How is bulk triisobutyl phosphate supplied and quoted?
RawSource supplies triisobutyl phosphate in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your target quantity, polymer/system and the fire test you must pass.
What is the REACH and TSCA regulatory status of Triisobutyl phosphate (TIBP)?
Triisobutyl phosphate (TIBP) (CAS 126-71-6) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 204-798-3).