- ▸ Halogen-free flame-retardant plasticizer for flexible PVC and engineering plastics
- ▸ Fire-resistant base-fluid component in hydraulic fluids and lubricants
- ▸ Low-volatility flame resistance for coatings and polymer compounds
- ▸ Plasticizer/flame retardant for cellulosic and styrenic polymers
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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Isopropylated triphenyl phosphate (IPPP) is an isopropylated triaryl phosphate flame-retardant plasticizer — a lower-volatility, halogen-free phosphate used as a modern FR plasticizer in PVC and engineering plastics, and as a replacement for some restricted flame retardants. Identity: CAS 68937-41-7.
What it is
Isopropylated triphenyl phosphate (CAS 68937-41-7) is a UVCB triaryl phosphate liquid with variable degrees of isopropylation, so it is defined by composition and grade rather than a single formula. The isopropyl substitution lowers volatility versus triphenyl phosphate.
How it performs in fire
It works in the condensed phase to promote char while plasticizing, with lower volatility and good permanence. It is widely adopted as a halogen-free FR plasticizer where some older flame retardants have been restricted.
Applications
IPPP is used as a halogen-free flame-retardant plasticizer in flexible PVC, engineering thermoplastics and PU. Compare TPP and TCP.
Forms, grades and handling
IPPP is supplied as a clear-to-pale liquid in drums, IBCs and bulk; grade is defined by composition. 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 Isopropylated 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 (isopropylated triaryl phosphate) |
| Flame-retardant type | Isopropylated triaryl phosphate |
| Role in fire performance | Condensed-phase char; plasticizer |
| CAS Number | 68937-41-7 |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 273-066-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Regulatory restriction status
Isopropylated Triphenyl Phosphate (IPPP) (CAS 68937-41-7) 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.
- U.S. EPA TSCA Section 6: subject to a U.S. federal risk-management action (6(h) PBT rule).
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 isopropylated triphenyl phosphate (IPPP) used for?
Isopropylated triphenyl phosphate (CAS 68937-41-7) is a halogen-free, low-volatility triaryl phosphate flame-retardant plasticizer for flexible PVC, engineering thermoplastics and polyurethane, often used as a replacement for some restricted flame retardants.
Does IPPP have a single molecular formula?
No — IPPP is a UVCB substance with a variable degree of isopropylation, so it is specified by composition and grade rather than one molecular formula. The CoA documents the grade.
How is bulk isopropylated triphenyl phosphate supplied and quoted?
RawSource supplies isopropylated 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 Isopropylated Triphenyl Phosphate?
Isopropylated Triphenyl Phosphate (CAS 68937-41-7) 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 273-066-3).