Methyl 5-acetylsalicylate
Methyl 5-acetylsalicylate (CAS: 16475-90-4), with the chemical formula CH3COC6H3-2-(OH)CO2CH3, is a valuable organic compound with a molecular weight of 194.18 g/mol. This ester derivative of salicylic acid serves as a key building block in chemical synthesis. Its structure, featuring both an ester and a ketone group along with a phenolic hydroxyl, makes it a versatile intermediate for creating more complex molecules in research and development.

Organic Synthesis Intermediate
Methyl 5-acetylsalicylate is employed as a versatile building block in the synthesis of complex organic molecules. Its functional groups allow for various chemical transformations, making it useful in the development of novel compounds.
Research and Development
This compound is utilised in academic and industrial research laboratories for exploring new synthetic pathways and developing new chemical entities. It contributes to the advancement of chemical science.
Fine Chemical Production
As a fine chemical, it serves as a precursor or intermediate in the manufacturing of specialised chemical products. Its defined structure and purity are crucial for downstream processes.
| Molecular weight | 194.18 |
|---|---|
| Linear formula | CH3COC6H3-2-(OH)CO2CH3 |
| Assay | 99% |
| Melting point | 62-64 °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 Methyl 5-acetylsalicylate used for?
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Methyl 5-acetylsalicylate is primarily used as an intermediate in organic synthesis and in research and development for creating novel chemical compounds. It is a versatile building block for fine chemical production.
What are the CAS number and chemical formula for Methyl 5-acetylsalicylate?
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The CAS number for Methyl 5-acetylsalicylate is 16475-90-4, and its chemical formula is CH3COC6H3-2-(OH)CO2CH3.
What grade and purity does Tech Serve Solutions supply for Methyl 5-acetylsalicylate?
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Tech Serve Solutions supplies Methyl 5-acetylsalicylate with an assay of 99%. This is a high-purity grade suitable for research and synthesis; TSS does not represent this product as USP, BP, or EP grade.
What are the safety and handling recommendations for Methyl 5-acetylsalicylate?
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Methyl 5-acetylsalicylate is classified with GHS07 symbol and a 'Warning' signal word. It carries hazard statements H315 (causes skin irritation), H319 (causes serious eye irritation), and H335 (may cause respiratory irritation). Appropriate personal protective equipment, including a dust mask type N95, eyeshields, and gloves, is recommended. Handle in a well-ventilated area. P261 and P305 + P351 + P338 precautionary statements apply.
How is Methyl 5-acetylsalicylate packed, shipped, and exported?
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Tech Serve Solutions offers expertise in packing, shipping, and exporting chemicals globally. Products are dispatched securely to meet international standards and customer requirements.
How can I request a sample or quote for Methyl 5-acetylsalicylate?
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To request a sample or a quote for Methyl 5-acetylsalicylate, please use the contact form on our website or reach out to our sales team directly.
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