mono-Methyl terephthalate
Mono-Methyl terephthalate (CAS: 1679-64-7), with the chemical formula 4-(HO2C)C6H4CO2CH3, is a key organic building block and ester derivative. It serves as a valuable intermediate in chemical synthesis. Its structure features both a carboxylic acid group and a methyl ester group, allowing for diverse reactivity in organic chemistry applications. This compound is typically supplied with an assay of 97% purity.

Organic Synthesis Intermediate
Mono-Methyl terephthalate is widely utilised as a precursor and intermediate in the synthesis of more complex organic molecules. Its bifunctional nature enables it to participate in various chemical reactions, forming new carbon-carbon or carbon-heteroatom bonds.
Building Block for Polymers
This compound can function as a monomer or a modifier in the development of specialised polymers. The terephthalate moiety is a common feature in polyesters, and mono-methyl terephthalate offers a route to modify polymer properties.
Reagent in Research and Development
In academic and industrial research settings, mono-methyl terephthalate is employed as a reagent for exploring new synthetic pathways and developing novel compounds. Its availability as a fine chemical supports innovation in materials science and medicinal chemistry.
| Molecular weight | 180.16 |
|---|---|
| Linear formula | 4-(HO2C)C6H4CO2CH3 |
| Assay | 97% |
| Solubility | chloroform/methanol: soluble50 mg/mL, clear, colorless (1:1) |
| Melting point | 220-223 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 mono-Methyl terephthalate used for?
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Mono-Methyl terephthalate is primarily used as an intermediate in organic synthesis and as a building block for polymers. It also finds application as a reagent in research and development for creating new organic compounds and exploring synthetic methodologies.
What are the CAS number and chemical formula for mono-Methyl terephthalate?
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The CAS number for mono-Methyl terephthalate is 1679-64-7, and its chemical formula is 4-(HO2C)C6H4CO2CH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies mono-Methyl terephthalate with a minimum assay of 97%. This product is supplied for laboratory and research purposes and is not intended for use as USP, BP, EP, nutraceutical, or food grade.
How should mono-Methyl terephthalate be handled safely?
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Mono-Methyl terephthalate is classified with GHS07 symbol and a Warning signal word. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). When handling, use a dust mask type N95 (US), wear eyeshields and gloves. Ensure adequate ventilation and avoid breathing dust.
Is mono-Methyl terephthalate a controlled substance?
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The provided data does not indicate that mono-Methyl terephthalate (CAS: 1679-64-7) is a controlled substance.
How is mono-Methyl terephthalate packed and exported?
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Tech Serve Solutions, a specialist global supplier and exporter since 1998, ensures that chemicals are appropriately packed for safe transit and compliance with international shipping regulations. Specific packaging details depend on quantity and destination.
How can I request a quote or sample?
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To request a quote or a sample of mono-Methyl terephthalate, please visit the Tech Serve Solutions website and use the contact form or contact our sales department directly.
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