Methyl trimethylacetate
Methyl trimethylacetate (CAS: 598-98-1) is a chemical ester with the linear formula (CH₃)₃CCOOCH₃ and a molecular weight of 116.16 g/mol. This compound is primarily recognised as a valuable building block in organic synthesis. It serves as an intermediate in the preparation of various chemical entities, contributing to research and development across multiple scientific disciplines. Its ester functionality and branched alkyl group make it a useful reagent for specific chemical transformations.
- IUPAC
- Methyl 2,2-dimethylpropionate,Methyl pivalate,Methyl trimethylacetate
- Synonyms
- Methyl 2,2-dimethylpropionateMethyl pivalate

Organic Synthesis Intermediate
Methyl trimethylacetate is employed as a key intermediate in the synthesis of more complex organic molecules. Its structure allows for various chemical reactions, making it suitable for constructing diverse chemical scaffolds.
Building Block for Fine Chemicals
As a C6 to C7 organic building block, this ester contributes to the production of fine chemicals. It is utilised in multi-step synthetic pathways where precise structural incorporation is required.
Research and Development
The compound finds application in laboratory settings for chemical research and development. Its properties are leveraged by chemists exploring new synthetic routes and novel compound discovery.
| Molecular weight | 116.16 |
|---|---|
| Linear formula | (CH3)3CCOOCH3 |
| Assay | 99% |
| Boiling point | 101 °C(lit.) |
| Density | 0.873 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.390(lit.) |

Hazard statements
- H225Highly flammable liquid and vapour
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 7 °C / 44.6 °F |
| Transport (UN / ADR) | UN 3272 3 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | F |
| Risk statements (R) | 11 |
| Safety statements (S) | 16 |
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 trimethylacetate used for?
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Methyl trimethylacetate is primarily used as a building block and intermediate in organic synthesis, contributing to the creation of fine chemicals and supporting research and development activities in chemistry.
What is the CAS number and formula for Methyl trimethylacetate?
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The CAS number for Methyl trimethylacetate is 598-98-1, and its linear formula is (CH₃)₃CCOOCH₃.
What grade and purity does Tech Serve Solutions supply for Methyl trimethylacetate?
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Tech Serve Solutions supplies Methyl trimethylacetate with an assay of 99%. This product is intended for chemical synthesis and research purposes; TSS does not represent it as USP, BP, or EP grade.
How should Methyl trimethylacetate be handled safely?
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Methyl trimethylacetate is a highly flammable liquid and vapour (H225). Handle with appropriate personal protective equipment, including eyeshields, gloves, and ensure adequate ventilation. Keep away from heat, sparks, and open flames. Refer to the Safety Data Sheet for comprehensive handling information.
How is Methyl trimethylacetate packed and shipped?
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Methyl trimethylacetate is shipped as a UN 3272 (Class 3, Packing Group II) hazardous material. Packaging adheres to regulations for flammable liquids.
How can I request a quote or sample for Methyl trimethylacetate?
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To request a quote or sample of Methyl trimethylacetate, please contact our sales team through the website or by phone. Specify the quantity and your requirements.
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