mono-Methyl phthalate
Mono-Methyl phthalate (CAS 4376-18-5), with the chemical formula 2-(HO2C)C6H4CO2CH3 and a molecular weight of 180.16 g/mol, is an organic ester. It is commonly employed as a building block in chemical synthesis and as an intermediate in the production of various organic compounds. Its properties make it suitable for research and development applications within the chemical and pharmaceutical industries.
- IUPAC
- Monomethyl phthalate

Chemical Synthesis Intermediate
Mono-Methyl phthalate serves as a valuable intermediate in organic synthesis. It can be used to introduce the phthalate moiety or undergo further reactions to create more complex molecules.
Research and Development
This compound is utilised in R&D settings for exploring new chemical reactions and developing novel materials or pharmaceutical leads. Its ester and carboxylic acid functionalities offer versatile reactivity.
Building Block for Organic Molecules
As an organic building block, it contributes to the construction of larger molecules, finding utility in areas such as polymer chemistry and the synthesis of speciality chemicals.
| Molecular weight | 180.16 |
|---|---|
| Linear formula | 2-(HO2C)C6H4CO2CH3 |
| Assay | 97% |
| Melting point | 82-84 °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 phthalate used for?
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Mono-Methyl phthalate (CAS 4376-18-5) is primarily used as a building block and intermediate in chemical synthesis, particularly in research and development for creating more complex organic molecules.
What are the CAS number and chemical formula for Mono-Methyl phthalate?
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The CAS number for Mono-Methyl phthalate is 4376-18-5, and its chemical formula is 2-(HO2C)C6H4CO2CH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Mono-Methyl phthalate with a minimum assay of 97%. This product is supplied for research and manufacturing purposes and is not represented as USP, BP, EP, or any other pharmacopoeial grade.
How should Mono-Methyl phthalate be handled safely?
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Mono-Methyl phthalate is a warning compound that can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95, eyeshields, and gloves, should be used. Ensure adequate ventilation.
Does Tech Serve Solutions export Mono-Methyl phthalate?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Mono-Methyl phthalate, to customers worldwide.
How can I request a quote or sample for Mono-Methyl phthalate?
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To request a quote or a sample of Mono-Methyl phthalate, please contact our sales team through the website or by phone, providing your specific requirements.
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