4-Methoxyphenylacetic acid
4-Methoxyphenylacetic acid (CAS: 104-01-8; Formula: CH3OC6H4CH2CO2H) is a white to off-white crystalline solid with a molecular weight of 166.17 g/mol. As a key organic building block and carboxylic acid derivative, it serves as a versatile intermediate in chemical synthesis. Its applications span various research and development sectors, contributing to the creation of more complex organic molecules for diverse industrial and scientific pursuits.
- IUPAC
- Homoanisic acid
- Synonyms
- Homoanisic acid

Organic Synthesis Intermediate
4-Methoxyphenylacetic acid is frequently employed as a starting material or intermediate in the synthesis of various organic compounds. Its functional groups allow for diverse chemical transformations, making it valuable in multi-step synthetic routes.
Pharmaceutical Research
This compound can be utilised in the development of novel pharmaceutical agents. Its structural features may be incorporated into biologically active molecules during drug discovery and development processes.
Agrochemical Development
It finds use in the research and synthesis of new agrochemicals. The structural motif of 4-methoxyphenylacetic acid can be a component in the design of compounds with potential pesticidal or herbicidal activity.
Material Science Research
As an organic building block, it may be investigated for its incorporation into novel polymers or materials. Its properties can be leveraged to modify or enhance the characteristics of advanced materials.
| Molecular weight | 166.17 |
|---|---|
| Linear formula | CH3OC6H4CH2CO2H |
| Assay | 98% |
| Grade | ReagentPlus® |
| Boiling point | 140 °C/3 mmHg(lit.) |
| Melting point | 84-86 °C(lit.) |


Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| 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 4-Methoxyphenylacetic acid used for?
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4-Methoxyphenylacetic acid is primarily used as an intermediate in organic synthesis, particularly in the research and development of pharmaceuticals, agrochemicals, and novel materials.
What are the CAS number and chemical formula for 4-Methoxyphenylacetic acid?
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The CAS number is 104-01-8, and the chemical formula is CH3OC6H4CH2CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Methoxyphenylacetic acid with a purity of 98% in ReagentPlus® grade. We do not represent this product as USP, BP, or EP grade.
What are the primary safety hazards associated with 4-Methoxyphenylacetic acid?
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4-Methoxyphenylacetic acid presents hazards including being harmful if swallowed (H302), causing skin irritation (H315), serious eye damage (H318), and respiratory irritation (H335). Appropriate personal protective equipment such as eyeshields, gloves, and an N95 dust mask should be worn. Handle in a well-ventilated area.
How is 4-Methoxyphenylacetic acid packed, shipped, and exported?
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Tech Serve Solutions professionally packs, ships, and exports 4-Methoxyphenylacetic acid globally, adhering to all relevant regulations for chemical substances. Specific packaging details depend on order size and destination.
How can I request a sample or a quote for 4-Methoxyphenylacetic acid?
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To request a sample or a quote, please contact our sales department via the website or direct email, providing your details and the quantity required.
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