mono-tert-Butyl malonate
Mono-tert-butyl malonate (CAS: 40052-13-9) is a key organic building block with the linear formula (CH3)3COCOCH2COOH and a molecular weight of 160.17 g/mol. This ester compound is primarily utilised in chemical synthesis for the preparation of more complex organic molecules. Its properties make it a valuable intermediate in various research and development applications within the chemical industry. Supplied by Tech Serve Solutions, it is available at a 95% assay.

Organic Synthesis Intermediate
Mono-tert-butyl malonate serves as a versatile intermediate in the synthesis of diverse organic compounds. Its malonate structure allows for various alkylation and acylation reactions, facilitating the construction of carbon frameworks.
Building Block for Complex Molecules
This compound is employed as a fundamental building block in multistep syntheses. It is particularly useful for introducing specific functional groups or structural motifs required for advanced chemical products and research materials.
Research and Development
Utilised in R&D settings, mono-tert-butyl malonate supports the exploration of new synthetic pathways and the development of novel chemical entities. Its consistent quality and assay make it reliable for experimental work.
| Molecular weight | 160.17 |
|---|---|
| Linear formula | (CH3)3COCOCH2COOH |
| Assay | 95% |
| Boiling point | 90 °C/2 mmHg(lit.) |
| Density | 1.04 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.426(lit.) |
| Impurities tested | 5% methanesulfonyl chloride |
| Melting point | 19-20 °C(lit.) |


Hazard statements
- H314Causes severe skin burns and eye damage
- H330Fatal if inhaled
Precautionary statements
- P260Do not breathe dust, fume, gas, mist, vapours or spray
- P280Wear protective gloves, clothing and eye/face protection
- P284Wear respiratory protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 91 °C / 195.8 °F |
| Transport (UN / ADR) | UN 2922 6.1(8) / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 26-34 |
| Safety statements (S) | 26-27-36/37/39-45 |
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-tert-butyl malonate used for?
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Mono-tert-butyl malonate is primarily used as a building block and intermediate in organic synthesis for creating more complex molecules and in research and development activities.
What is the CAS number and formula for mono-tert-butyl malonate?
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The CAS number is 40052-13-9 and the linear formula is (CH3)3COCOCH2COOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies mono-tert-butyl malonate with an assay of 95%. We do not represent this product as USP, BP, EP, or other pharmacopoeia grades unless explicitly stated.
How should mono-tert-butyl malonate be handled?
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Mono-tert-butyl malonate is a corrosive and toxic substance. Handle with extreme care using appropriate personal protective equipment, including a full-face respirator, chemical-resistant gloves, and eye protection, in a well-ventilated area. Refer to the Safety Data Sheet for detailed handling and emergency procedures.
How is mono-tert-butyl malonate packed and exported?
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Products are carefully packed according to international shipping regulations to ensure safe transit. Tech Serve Solutions is an experienced global exporter of fine chemicals.
How can I request a sample or quote for mono-tert-butyl malonate?
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To request a sample or a quote, please contact our sales team through the website or by phone, providing the product name and CAS number (40052-13-9).
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