Trimellitic anhydride chloride
Trimellitic anhydride chloride (CAS: 1204-28-0, Formula: C9H3ClO4) is a reactive chemical compound with a molecular weight of 210.57 g/mol. It is primarily utilized as a monomer in the synthesis of polymers, particularly for applications in materials science. Its chemical structure lends itself to various cross-linking and modification processes in polymer chemistry, contributing to the development of advanced materials with specific properties.
- IUPAC
- Benzene-1,2,4-tricarboxylic 1,2-anhydride 4-chloride
- Synonyms
- Benzene-1,2,4-tricarboxylic 1,2-anhydride 4-chloride

Polymer Synthesis
Serves as a key monomer for the creation of specialised polymers, including polyesters and polyamides. Its reactive nature allows for controlled polymerisation and cross-linking reactions.
Materials Science
Employed in the development of novel materials requiring specific thermal or mechanical properties. It can be incorporated into polymer backbones or used as a cross-linking agent.
Chemical Intermediate
Acts as a versatile intermediate in the synthesis of more complex organic molecules. Its anhydride and chloride functionalities offer multiple reaction pathways.
| Molecular weight | 210.57 |
|---|---|
| Empirical formula | C9H3ClO4 |
| Assay | 98% |
| Storage temperature | 2-8°C |
| Melting point | 66-68 °C(lit.) |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
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 Trimellitic anhydride chloride used for?
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Trimellitic anhydride chloride is used as a monomer in polymer synthesis and in materials science for developing polymers with specific properties. It also serves as a chemical intermediate for organic synthesis.
What are the CAS number and formula for Trimellitic anhydride chloride?
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The CAS number for Trimellitic anhydride chloride is 1204-28-0, and its empirical formula is C9H3ClO4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Trimellitic anhydride chloride with a purity of 98%. We do not represent this product as USP, BP, or EP grade.
How should Trimellitic anhydride chloride be handled?
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Trimellitic anhydride chloride is a Danger substance (GHS05) and causes severe skin burns and eye damage (H314). Appropriate personal protective equipment, including eyeshields, face shields, gloves, and respiratory protection, must be used. Handle in a well-ventilated area.
Is Trimellitic anhydride chloride shipped internationally?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Trimellitic anhydride chloride, adhering to all relevant shipping regulations (e.g., UN 3261, Class 8, PG II).
How can I request a quote or sample for Trimellitic anhydride chloride?
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Please contact our sales team via our website or direct inquiry to request a quote or sample for Trimellitic anhydride chloride. We will respond promptly with availability and pricing.
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