3-Methyl-1-butanol
3-Methyl-1-butanol (CAS: 123-51-3), also known as isoamyl alcohol, is a clear, colourless liquid with a characteristic pungent odour. This primary alcohol possesses the molecular formula (CH3)2CHCH2CH2OH and a molecular weight of 88.15 g/mol. It serves as a versatile solvent and an important intermediate in organic synthesis, with specific applications in cell biology and nutrition research.
- IUPAC
- Isoamyl alcohol,Isopentyl alcohol
- Synonyms
- Isoamyl alcoholIsopentyl alcohol3-Methylbutan-1-olIsopentanol

Solvent Applications
3-Methyl-1-butanol is utilised as a solvent in various industrial and laboratory processes. Its properties make it suitable for extractions and as a medium for certain chemical reactions, particularly where moderate polarity is required.
Cell Biology Research
This compound finds application in cell biology, often employed in methods such as nucleic acid purification. Its specific solvent characteristics aid in isolating biological macromolecules.
Phytochemical Analysis
Within the realm of phytochemicals derived from plants like Humulus lupulus (Hops), 3-Methyl-1-butanol can be used in extraction or analytical procedures. It aids in the study of naturally occurring compounds.
Organic Synthesis Intermediate
As a primary alcohol, 3-Methyl-1-butanol is a valuable building block in organic synthesis. It can be readily converted into various derivatives, serving as an intermediate for more complex molecules.
| Molecular weight | 88.15 |
|---|---|
| Linear formula | (CH3)2CHCH2CH2OH |
| Assay | 98% |
| Grade | SAJ first grade |
| Boiling point | 130 °C(lit.) |
| Density | 0.809 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.406(lit.) |
| Melting point | −117 °C(lit.) |
| Vapour pressure | 2 mmHg (20 °C) |
| Vapour density | 3 (vs air) |
| Autoignition temp | 644 °F |
| Storage temperature | room temp |
| Suitability | suitable for nucleic acid purification |


Hazard statements
- H226Flammable liquid and vapour
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 43 °C / 109.4 °F |
| Transport (UN / ADR) | UN 1105 3 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-20-37-66 |
| Safety statements (S) | 46 |
| Supplemental hazards | Repeated exposure may cause skin dryness or cracking. |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 1.2-9 %, 100 °F |
|---|---|
| Availability | available only in Japan |
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-Methyl-1-butanol used for?
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3-Methyl-1-butanol is used as a solvent, an intermediate in organic synthesis, and finds applications in cell biology, nutrition research, and phytochemical analysis.
What is the CAS number and chemical formula for 3-Methyl-1-butanol?
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The CAS number is 123-51-3 and the linear chemical formula is (CH3)2CHCH2CH2OH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Methyl-1-butanol in SAJ first grade with an assay of 98%. We do not represent this product as USP, BP, or EP grade unless explicitly stated in the product documentation.
What are the primary safety hazards associated with 3-Methyl-1-butanol?
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3-Methyl-1-butanol is a flammable liquid and vapour (H226) and can cause respiratory irritation (H335) and be harmful if inhaled (H332). It may also cause skin dryness or cracking upon repeated exposure.
Is 3-Methyl-1-butanol available for export?
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3-Methyl-1-butanol is available only in Japan. Please contact us for specific export inquiries regarding other regions or products.
How can I request a sample or quote for 3-Methyl-1-butanol?
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To request a sample or a quote, please navigate to the product page and utilise the 'Request Sample' or 'Request Quote' buttons, providing the necessary contact details.
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