Overview
3-Methoxy-3-methyl-1-butanol (CAS 56539-66-3 ) is a slow-evaporating glycol ether-type solvent used across coatings, cleaning, and adhesive formulations. Its controlled evaporation rate and strong solvency support film formation and substrate wetting in demanding environments.
In architectural and industrial coatings, it functions as a coalescing solvent and rheology modifier, improving flow, leveling, and open time in waterborne systems. This versatility makes it a staple for high-performance finishes.
Adhesive and sealant formulators use it to adjust viscosity and extend working time in solvent-based and hybrid systems. It provides the necessary stability for complex chemical mixtures during the application process.
In home care and industrial cleaning concentrates, it enhances active ingredient solubility and aids in soil removal from hard surfaces. Its unique chemical structure allows for effective degreasing without rapid evaporation.
Printing ink manufacturers incorporate it to control drying speed and maintain ink stability across different substrate types. This ensures consistent print quality and prevents premature drying on the equipment during long runs.
3-Methoxy-3-methyl-1-butanol is supplied as a clear liquid in standard drum and IBC packaging. Technical grade is the primary commercial form available from specialty solvent suppliers for various industrial needs.
Purity levels of 98% and above are typical for industrial formulation use. The product meets rigorous internal quality controls to ensure performance consistency across different batches and applications in the global market.
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Physical Properties
| Melting Point | -50 °C |
| Boiling Point | 63 °C @ Press: 7 Torr |
| Density | 0.9220 g/cm³ @ Temp: 20 °C |
| Flash Point | 160 °F |
| Appearance | clear colourless liquid |
| Color | Clear colorless |
| Odor | Practically odourless |
| Form | Liquid |
| Water Solubility | Soluble in water. |
| Vapor Pressure | 47Pa at 20℃ |
| Refractive Index | n 20/D 1.428(lit.) |
| Log P | 0.18 at 25℃ |
Safety & Handling
Warning GHS07 Hazard Statements H227 Combustible liquid H319 Causes serious eye irritation Precautionary Statements P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P280 Wear protective gloves/protective clothing/eye protection/face protection. P403 Store in a well-ventilated place. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P370+P378 Use … for extinction. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29094990 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 56539-66-3
- EC Number
- 260-252-4
- Mol. Weight
- 118.17
- HS Code
- 29094990
- Category
- Alcohols & Glycols