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Tricresyl Phosphate

CAS 1330-78-5

Tricresyl phosphate (TCP) is a triaryl phosphate ester used as a flame-retardant plasticizer and as an anti-wear/extreme-pressure additive. It plasticizes and flame-proofs flexible PVC, vinyl and nitrocellulose, and is a long-established load-carrying additive in lubricants and hydraulic fluids. Modern commercial grades are made from low-ortho cresol feedstock to minimize the tri-ortho-cresyl isomer

Safety Data Sheet
CAS Number
1330-78-5
Material Family
Phosphate Esters & Derivatives
At a Glance
Material Family
Phosphate Esters & Derivatives
Record Type
Polymer fluid
Primary Role
Flame Retardancy · Plasticizing
Functional Roles
Flame Retardancy Plasticizing Lubrication
Industries Served
Plastics & Polymers Coatings & Construction
Applications & Use Cases
  • ▸ Flame-retardant plasticizer for flexible PVC, vinyl and nitrocellulose
  • ▸ Anti-wear and extreme-pressure additive in lubricants and hydraulic fluids
  • ▸ Fire-resistant flexibilizer for coatings and polymer compounds
  • ▸ Plasticizer for nitrocellulose lacquers and cellulosic films
Safety & Handling
Full SDS available on request

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.

Chemical Identity
CAS Number
1330-78-5
Synonyms & Trade Names
TCP Tritolyl phosphate TTP Tris(methylphenyl) phosphate Tricresyl phosphate (low-ortho)
Full Description

As a plasticizer, TCP combines flexibility with fire resistance and low volatility in flexible PVC, vinyl films and nitrocellulose lacquers. In lubrication it is a classic anti-wear and extreme-pressure additive for hydraulic fluids, greases and engine oils, where it forms protective films on metal surfaces under load. It also functions as a fire-resistant flexibilizer in coatings and polymer compounds. Because the tri-ortho isomer drives the material's toxicological concern, current production is based on low-ortho cresol to keep that isomer to a minimum

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.

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