3-Methoxybutyraldehyde dimethyl acetal
3-Methoxybutyraldehyde dimethyl acetal (CAS: 10138-89-3) is an organic compound with the molecular formula CH3CH(OCH3)CH2CH(OCH3)2. This acetal functions as a versatile building block in organic synthesis. It is primarily utilised in the chemical industry for the development of complex molecules and as an intermediate in various chemical processes. Its unique structure allows for specific chemical transformations, making it a valuable reagent for research and development.
- IUPAC
- 1,1,3-Trimethoxybutane

Organic Synthesis Intermediate
3-Methoxybutyraldehyde dimethyl acetal serves as a key intermediate in the synthesis of various organic compounds. Its acetal functionality offers protection for the aldehyde group, enabling selective reactions elsewhere in a molecule.
Building Block for Complex Molecules
This compound acts as a valuable building block in the construction of more intricate molecular architectures. It is employed in multi-step syntheses within academic and industrial research settings.
Chemical Research and Development
Utilised in R&D laboratories, 3-Methoxybutyraldehyde dimethyl acetal aids in exploring new synthetic pathways and developing novel chemical entities.
| Molecular weight | 148.20 |
|---|---|
| Linear formula | CH3CH(OCH3)CH2CH(OCH3)2 |
| Assay | 98% |
| Boiling point | 157 °C(lit.) |
| Density | 0.921 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.403(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
- 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, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 47 °C / 116.6 °F |
| Transport (UN / ADR) | UN 3271 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36/37/38 |
| Safety statements (S) | 16-26-36/37/39 |
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-Methoxybutyraldehyde dimethyl acetal used for?
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3-Methoxybutyraldehyde dimethyl acetal is primarily used as an intermediate in organic synthesis and as a building block for constructing complex molecules in chemical research and development.
What is the CAS number and chemical formula for 3-Methoxybutyraldehyde dimethyl acetal?
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The CAS number is 10138-89-3, and the chemical formula is CH3CH(OCH3)CH2CH(OCH3)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Methoxybutyraldehyde dimethyl acetal with an assay of 98%. We do not represent this product as USP, BP, or EP grade; it is suitable for technical and research applications.
How should 3-Methoxybutyraldehyde dimethyl acetal be handled safely?
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This compound is flammable and harmful if swallowed, causing skin and eye irritation, and may cause respiratory irritation. Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area, away from ignition sources. Please consult the Safety Data Sheet for full details.
How is 3-Methoxybutyraldehyde dimethyl acetal packed and shipped?
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3-Methoxybutyraldehyde dimethyl acetal is packed and shipped in compliance with all relevant regulations for hazardous materials, designated as UN 3271, Class 3, Packing Group III.
How can I request a quote or sample?
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To request a quote or sample of 3-Methoxybutyraldehyde dimethyl acetal, please contact our sales team through the TSS website or via direct inquiry, providing your contact details and required quantity.
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