Tetrachlorophthalic Acid Hemihydrate from TCI is an aromatic dicarboxylic acid derived from phthalic acid in which all four positions on the benzene ring carry chlorine atoms. It is supplied as a hemihydrate, meaning it contains water of crystallization in its structure. As a non-heterocyclic building block, it is used in the laboratory to prepare tetrachlorophthalic anhydride, esters, imides, and other derivatives. These derivatives play a role in developing pigments, dyes, flame-retardant materials, and specialty polymers, so the compound is a versatile starting point for synthetic work.
Chemists choose this material because it combines two neighbouring carboxylic acid groups in the ortho position with a heavily halogenated aromatic ring. The ortho arrangement makes it easy to form cyclic anhydrides and imides, either by dehydration or by reaction with amines. The chlorine atoms improve the thermal stability and flame-retardant properties of the final products. The chlorinated ring also changes the electronic character of the molecule, which matters when designing dyes and ligands for coordination chemistry. Together, these features let researchers build functional molecules in only a few synthetic steps.
In Indonesian laboratories, this material suits research in synthetic organic chemistry, polymer chemistry, and coordination chemistry at universities and research institutes. It is also useful for industrial development laboratories working on pigments, dyes, flame retardants, or specialty polymer formulations. Student research projects and thesis work can use it to study anhydride and imide formation, while applied research groups can use it to explore halogenated aromatic derivatives. Coming from an established brand like TCI gives laboratories a consistent, well-documented source for routine and exploratory synthesis.
TCI brochures (PDF)
- Organic Linker Molecules for Metal Organic Frameworks (MOFs) 2026-05-11 · p. 3
- Preparation of tetrachlorophthalic anhydride: the two ortho carboxylic acid groups dehydrate readily to form the cyclic anhydride, a key intermediate for many further transformations.
- Synthesis of imides and esters: reaction with amines or alcohols gives tetrachlorophthalimides and esters, which are useful in building larger functional molecules for research and development.
- Development of pigments and dyes: the chlorinated aromatic ring changes the electronic properties of the molecule, which helps researchers tune colour and stability in dye and pigment design.
- Flame-retardant and specialty polymer research: the chlorine atoms add thermal stability and flame-retardant character, making derivatives of this acid valuable for exploring high-performance polymer materials.
- Ligand design in coordination chemistry: the dicarboxylic acid groups can bind metal centres while the halogenated ring changes the electronic environment, supporting studies of new metal complexes.
| Brand | TCI (product code T0070) |
|---|---|
| CAS number | 632-58-6 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Non-Heterocyclic Building Blocks |
| Pack sizes | available in the standard pack sizes offered by TCI for this product code |
| Physical form | hemihydrate (contains water of crystallization) |
| Storage | keep tightly closed in a cool, dry place according to the manufacturer's recommendations |
Store Tetrachlorophthalic Acid Hemihydrate in its original, tightly sealed container in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible substances such as strong bases and strong oxidizing agents. Because the material is a hydrate, keep the container closed when not in use to protect its water of crystallization from changes caused by humidity or heat. Handle it in a fume hood or well-ventilated area, and wear safety glasses, chemical-resistant gloves, and a lab coat. Avoid creating or breathing in dust, and prevent contact with skin and eyes. Always read the TCI Safety Data Sheet before use, and dispose of waste according to local laboratory and environmental regulations.
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Product Categories
- Organic-Inorganic Hybrid MaterialsMetal Organic Frameworks (MOF) and Their Raw MaterialsOrganic Linker Molecules [Metal Organic Frameworks (MOFs) Precursors]
- Polymer/Macromolecule ReagentsMetal Organic Frameworks (MOF) and Their Raw MaterialsOrganic Linker Molecules [Metal Organic Frameworks (MOFs) Precursors]
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