- ▸ Non-halogen flame retardant for engineering thermoplastics (PPO/PC-ABS) and cellulosic plastics
- ▸ Plasticizer and fire-resistance additive in coatings, films, and adhesives
- ▸ Solid aryl phosphate FR for rigid and semi-rigid 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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Triphenyl phosphate (TPP) is the solid triaryl phosphate — a halogen-free flame retardant and plasticizer used heavily in engineering-plastic blends (notably PPO/PC) and in cellulosics. It combines fire performance with plasticization in one additive. Identity: CAS 115-86-6.
What it is
Triphenyl phosphate (CAS 115-86-6) is a white crystalline solid triaryl phosphate. Being solid, it is well suited to engineering thermoplastics and resin systems where a non-volatile, halogen-free phosphorus FR is wanted.
How it performs in fire
It acts in the condensed phase, promoting char, while plasticizing the polymer. In PPO/PC and PC/ABS blends it is a standard halogen-free flame retardant; in cellulose-based plastics and coatings it is a long-established FR plasticizer.
Applications
TPP is used as a halogen-free flame retardant and plasticizer in PPO/PC and PC/ABS engineering blends, cellulose acetate and nitrocellulose, PVC, and coatings. Liquid triaryl alternatives: TCP, TXP and IPPP.
Forms, grades and handling
TPP is supplied as a white crystalline solid (flake/granule) in bags 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 Triphenyl 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 (solid triaryl phosphate) |
| Flame-retardant type | Triaryl phosphate (solid) |
| Role in fire performance | Condensed-phase char; plasticizer |
| CAS Number | 115-86-6 |
| Molecular Formula | C18H15O4P |
| Molecular Weight | 326.3 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 204-112-2
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Regulatory restriction status
Triphenyl Phosphate (TPP) (CAS 115-86-6) 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 SVHC Candidate List (EU): listed 7 Nov 2024 on the basis of endocrine-disrupting properties (Art. 57(f)). 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 triphenyl phosphate (TPP) used for?
Triphenyl phosphate (CAS 115-86-6) is a solid triaryl phosphate used as a halogen-free flame retardant and plasticizer, notably in PPO/PC and PC/ABS engineering blends, cellulosics, PVC and coatings.
Is TPP halogen-free?
Yes — triphenyl phosphate contains no bromine or chlorine; it is a phosphorus-based halogen-free flame retardant.
How is bulk triphenyl phosphate supplied and quoted?
RawSource supplies triphenyl 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 Triphenyl Phosphate (TPP)?
Triphenyl Phosphate (TPP) (CAS 115-86-6) 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 204-112-2).