- ▸ Aryl phosphate flame retardant and plasticizer for flexible PVC and vinyl
- ▸ Low-volatility flame resistance in wire-and-cable insulation and coatings
- ▸ Permanent flexibilizer for fire-rated polymer compounds
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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Trixylenyl phosphate (TXP) is a low-volatility triaryl phosphate flame-retardant plasticizer. Its higher molecular weight gives lower volatility and better permanence than TCP/TPP, which suits durable flexible PVC and hydraulic-fluid use. Identity: CAS 25155-23-1.
What it is
Trixylenyl phosphate (CAS 25155-23-1) is a triaryl phosphate liquid based on xylenols. The added methyl groups raise molecular weight and lower volatility versus triphenyl/tricresyl phosphate.
How it performs in fire
It works in the condensed phase to promote char while plasticizing, and its low volatility means it stays in the part longer, improving permanence in flexible PVC. In fluids it is used as an anti-wear/FR phosphate.
Applications
TXP is used as a low-volatility flame-retardant plasticizer in flexible PVC and vinyl, and in fire-resistant hydraulic fluids and lubricants. Compare TCP and TPP.
Forms, grades and handling
TXP is supplied as a clear-to-pale 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 Trixylenyl 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 | Flame-retardant plasticizer (triaryl phosphate) |
| Flame-retardant type | Triaryl phosphate |
| Role in fire performance | Condensed-phase char; plasticizer |
| CAS Number | 25155-23-1 |
| Molecular Formula | C24H27O4P |
| Molecular Weight | 410.4 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 246-677-8
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Restricted substance — regulatory status
Trixylenyl Phosphate (TXP) (CAS 25155-23-1) appears on the regulatory list(s) below. This is public regulatory information about the substance — not a statement about any specific supplier’s material, and not a safety claim. Confirm the current status for your jurisdiction and intended use.
- REACH Authorisation List (Annex XIV): use or placing on the EU market after the sunset date (sunset 27 May 2023) requires a specific REACH authorisation. Sale and use outside the EU are not restricted by Annex XIV.
- REACH SVHC Candidate List (EU): listed 16 Dec 2013 on the basis of toxic for reproduction (Art. 57(c)). SVHC status triggers EU supplier-communication and notification duties above 0.1% w/w; it is not, by itself, a ban on sale.
Sources: ECHA Candidate List / Annex XIV / Annex XVII (echa.europa.eu); U.S. EPA TSCA; UN Stockholm Convention / EU POPs Regulation; California OEHHA Proposition 65 list. Retrieved 2026-07-13.
Frequently Asked Questions
What is trixylenyl phosphate (TXP) used for?
Trixylenyl phosphate (CAS 25155-23-1) is a low-volatility triaryl phosphate used as a flame-retardant plasticizer in flexible PVC and in fire-resistant hydraulic fluids and lubricants; its higher molecular weight improves permanence over TCP/TPP.
How is bulk trixylenyl phosphate supplied and quoted?
RawSource supplies trixylenyl 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 Trixylenyl Phosphate (TXP)?
Trixylenyl Phosphate (TXP) (CAS 25155-23-1) 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 246-677-8).