3-(tert-Butoxy)propionic acid
3-(tert-Butoxy)propionic acid (CAS: 21150-73-2), with molecular formula C7H14O3 and a molecular weight of 146.18 g/mol, is a versatile carboxylic acid derivative. This compound serves as a valuable building block in organic synthesis and chemical research. It is characterised by its tert-butoxy ester functionality, making it useful for introducing protected propionic acid moieties into more complex molecules. Supplied by Tech Serve Solutions for laboratory and industrial applications.

Organic Synthesis Intermediate
3-(tert-Butoxy)propionic acid functions as a key intermediate in the construction of complex organic molecules. Its protected carboxylic acid group allows for selective reactions elsewhere in the molecule before deprotection.
Pharmaceutical Research
This compound is employed in medicinal chemistry and pharmaceutical research as a building block for novel drug candidates. It can be incorporated into scaffolds to modulate pharmacokinetic properties.
Materials Science
The unique structure of 3-(tert-Butoxy)propionic acid lends itself to applications in materials science, potentially in the synthesis of specialised polymers or functionalised materials.
| Molecular weight | 146.18 |
|---|---|
| Empirical formula | C7H14O3 |
| Assay | ≥98.0% (T) |
| Density | 0.989 g/mL at 20 °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 | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
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 3-(tert-Butoxy)propionic acid used for?
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3-(tert-Butoxy)propionic acid is primarily used as a building block and intermediate in organic synthesis, including in pharmaceutical research and potentially materials science applications.
What are the CAS number and molecular formula for 3-(tert-Butoxy)propionic acid?
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The CAS number is 21150-73-2 and the molecular formula is C7H14O3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-(tert-Butoxy)propionic acid with an assay of ≥98.0% (T). This is a technical/research grade, and TSS does not represent it as USP, BP, EP, or other pharmacopoeia grades.
How should 3-(tert-Butoxy)propionic acid be handled?
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As per GHS regulations, this compound is a warning substance (GHS07) and may cause skin irritation (H315), eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, should be used. Always consult the Safety Data Sheet (SDS) before handling.
Is 3-(tert-Butoxy)propionic acid a controlled substance?
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The provided data does not indicate that 3-(tert-Butoxy)propionic acid is a controlled substance.
How is 3-(tert-Butoxy)propionic acid packaged and exported?
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Tech Serve Solutions, a global supplier and exporter, carefully packages chemicals to meet international shipping standards for export.
How can I request a quote or sample for 3-(tert-Butoxy)propionic acid?
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To request a quote or a sample, please contact our sales department via the website or by telephone, providing the product name and CAS number.
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