3,4,5,6-Tetrahydrophthalic anhydride
3,4,5,6-Tetrahydrophthalic anhydride (CAS: 2426-02-0, C8H8O3) is a cyclic anhydride with a molecular weight of 152.15 g/mol. This compound is a versatile intermediate employed in various chemical synthesis applications, including the production of polymers, resins, and plasticisers. Its reactive anhydride group allows for facile derivatisation, making it a valuable building block in organic chemistry for creating more complex molecules.
- IUPAC
- Cyclohexene-1,2-dicarboxylic anhydride
- Synonyms
- 6-Tetrahydrophthalic anhydrideCyclohexene-1,2-dicarboxylic anhydride

Polymer and Resin Synthesis
Utilised as a monomer or curing agent in the production of unsaturated polyester resins, alkyd resins, and epoxy resins, contributing to their desirable physical and chemical properties.
Chemical Intermediate
Serves as a key building block in organic synthesis for the preparation of various compounds, including pharmaceuticals, agrochemicals, and specialty chemicals.
Plasticiser Production
Can be used in the synthesis of plasticisers, which are additives that increase the plasticity or decrease the viscosity of a material, commonly used in polymers.
| Molecular weight | 152.15 |
|---|---|
| Empirical formula | C8H8O3 |
| Assay | ≥95.0% (GC) |
| Melting point | 69-73 °C(lit.)69-73 °C |


Hazard statements
- H317May cause an allergic skin reaction
- H318Causes serious eye damage
- H334May cause allergy or asthma symptoms if inhaled
- H412Harmful to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P342
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 41-42/43-52/53 |
| Safety statements (S) | 22-24-26-37/39-61 |
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 3,4,5,6-Tetrahydrophthalic anhydride primarily used for?
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3,4,5,6-Tetrahydrophthalic anhydride is primarily used as a building block in organic synthesis and in the production of polymers, resins, and plasticisers.
What are the CAS number and chemical formula for 3,4,5,6-Tetrahydrophthalic anhydride?
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The CAS number is 2426-02-0 and the chemical formula is C8H8O3.
What grade and purity does Tech Serve Solutions supply for 3,4,5,6-Tetrahydrophthalic anhydride?
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Tech Serve Solutions supplies 3,4,5,6-Tetrahydrophthalic anhydride with an assay of ≥95.0% (GC). We do not represent this product as USP, BP, EP, pharmacopoeia, or food grade.
How should 3,4,5,6-Tetrahydrophthalic anhydride be handled safely?
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Handling requires caution. It can cause allergic skin reactions (H317), serious eye damage (H318), and respiratory irritation or allergic reactions (H334). It is also harmful to aquatic life with long-lasting effects (H412). Always wear appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, face shield, and gloves. Ensure good ventilation and avoid breathing dust.
Is 3,4,5,6-Tetrahydrophthalic anhydride shipped internationally?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 3,4,5,6-Tetrahydrophthalic anhydride.
How can I request a sample or quote for 3,4,5,6-Tetrahydrophthalic anhydride?
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Please contact our sales department directly via the website or by calling to request a sample or obtain a quotation.
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