1,1,1-Tris(4-hydroxyphenyl)ethane
1,1,1-Tris(4-hydroxyphenyl)ethane (CAS: 27955-94-8) is a chemical compound with the molecular formula CH3C(C6H4OH)3 and a molecular weight of 306.36 g/mol. This triol is recognised for its applications in polymer science and materials science, serving as a key monomer in the synthesis of various advanced polymers. Its unique structure allows for cross-linking and the development of materials with tailored properties.
- IUPAC
- 4,4′,4′′-Ethylidynetrisphenol,THPE
- Synonyms
- 27955-94-84,4′,4′′-EthylidynetrisphenolTHPECH3C(C6H4OH)3

Monomer for Polymer Synthesis
1,1,1-Tris(4-hydroxyphenyl)ethane serves as a trifunctional monomer in the production of specialty polymers, including polycarbonates, polyesters, and epoxy resins. Its structure facilitates the creation of highly branched or cross-linked polymer networks.
Epoxy Resin Curing Agent
It can be employed as a curing agent or hardener for epoxy resin systems. The phenolic hydroxyl groups react with epoxy groups, leading to the formation of rigid, thermoset materials with enhanced thermal stability and chemical resistance.
Materials Science Applications
The compound finds use in materials science for developing functional materials. Its incorporation into polymer backbones or networks can impart specific properties like high glass transition temperatures or flame retardancy.
| Molecular weight | 306.36 |
|---|---|
| Linear formula | CH3C(C6H4OH)3 |
| Assay | 99% |
| Melting point | 246-248 °C(lit.) |

Hazard statements
- H411Toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
| Protective equipment | Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | N |
| Risk statements (R) | 51/53 |
| Safety statements (S) | 61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1,1,1-Tris(4-hydroxyphenyl)ethane used for?
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1,1,1-Tris(4-hydroxyphenyl)ethane is primarily used as a monomer in polymer synthesis, particularly for creating branched or cross-linked polymers like polycarbonates and epoxy resins, and in materials science applications.
What is the CAS number and formula for 1,1,1-Tris(4-hydroxyphenyl)ethane?
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The CAS number for 1,1,1-Tris(4-hydroxyphenyl)ethane is 27955-94-8, and its linear formula is CH3C(C6H4OH)3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,1,1-Tris(4-hydroxyphenyl)ethane with an assay of 99%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 1,1,1-Tris(4-hydroxyphenyl)ethane be handled?
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Handle 1,1,1-Tris(4-hydroxyphenyl)ethane with appropriate personal protective equipment, including eyeshields and gloves. It is classified as hazardous to the aquatic environment, with long-term effects (H411), so avoid release to the environment (P273).
How is 1,1,1-Tris(4-hydroxyphenyl)ethane packed and shipped?
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This product is shipped as UN 3077, Environmentally hazardous substance, solid, n.o.s. (1,1,1-Tris(4-hydroxyphenyl)ethane), Class 9, Packing Group III.
How can I request a quote or sample?
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To request a quote or a sample of 1,1,1-Tris(4-hydroxyphenyl)ethane, please contact our sales department via the website or your usual sales representative.
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