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Methyl Isobutyl Ketone

Also known as 4-methylpentan-2-one, 4-Methyl-2-pentanone, Isopropylacetone, Isobutyl methyl ketone

Methyl Isobutyl Ketone (4-methylpentan-2-one), CAS 108-10-1, is an organic ketone solvent used in coatings, extraction, adhesives and chemical manufacturing.

Solvents Ketone solvents
C₆H₁₂O
C₆H₁₂O

Product identity

CAS number
108-10-1
Molecular formula
C6H12O
Molecular weight
100.16 g/mol
Category
Solvents
Subcategory
Ketone solvents
Common aliases
4-methylpentan-2-one, 4-Methyl-2-pentanone, Isopropylacetone

Product overview

What is Methyl Isobutyl Ketone?

Methyl Isobutyl Ketone is an organic ketone solvent also known as 4-methylpentan-2-one, 4-Methyl-2-pentanone, Isopropylacetone, Isobutyl methyl ketone and Hexone. Its CAS number is 108-10-1, molecular formula is C6H12O, and stated molecular weight is 100.16. The molecule contains a carbonyl group within a branched six-carbon structure, giving it a useful balance of solvent polarity and hydrocarbon character.

As a clear, volatile liquid, Methyl Isobutyl Ketone can dissolve or assist dispersion of many resins, oils and organic materials. Its ketone functionality supports solvency, while the branched hydrocarbon portion influences evaporation and compatibility. Behaviour depends on formulation composition, temperature, concentration and contact materials. It is flammable and requires professionally managed handling, ventilation and controls appropriate to the applicable safety information.

Methyl Isobutyl Ketone has an established industrial context as a solvent in coatings, printing-related materials, adhesives, extraction systems and selected chemical processes. It may help adjust viscosity, promote film formation or separate organic components, depending on the formulation. Mining and mineral-processing operations may also evaluate it in extraction chemistry. The suitability of any particular grade remains dependent on process design and technical evaluation.

Selection should consider the required evaporation profile, resin compatibility, extraction behaviour, odour profile, worker exposure controls and interaction with equipment or substrates. Methyl Isobutyl Ketone may be compared with methyl ethyl ketone, methyl isobutyl carbinol or other oxygenated solvents, but each offers different volatility, polarity and solvency. Users should assess the complete formulation rather than infer performance from the solvent name alone. For commercial selection, the compound name should be considered separately from the specification and supplied form required for the intended process.

Technical profile

Product properties

Review the product identity and general physical profile before specifying the grade required for your operation.

IUPAC name
4-methylpentan-2-one
Category
Solvents
Subcategory
Ketone solvents
Molecular formula
C6H12O
Molecular weight
100.16 g/mol

Uses and markets

Applications and industries

The correct product specification depends on the intended process, grade requirements and operating conditions.

Detailed product information

Detailed Methyl Isobutyl Ketone product information

Solvent behaviour in coating systems

Methyl Isobutyl Ketone can serve as a solvent for selected coating resins, helping create a workable liquid formulation before application. Its evaporation characteristics influence open time, film development and final appearance, while compatibility must be established for the specific binder, pigment package and co-solvent blend. Formulators commonly evaluate it alongside faster or slower solvents to balance application behaviour with process requirements. It should not be treated as universally suitable for every coating chemistry.

In a coating system, Methyl Isobutyl Ketone may contribute to viscosity control and resin wetting without functioning as the sole determinant of performance. The final result depends on solids content, ambient conditions, substrate, application method and interactions among all ingredients. Comparative screening against alternatives such as methyl ethyl ketone, acetates or hydrocarbon solvents can clarify whether its solvency and evaporation profile fit the intended formulation.

Extraction and process chemistry considerations

Methyl Isobutyl Ketone is used in selected extraction and process applications because its organic solvent character can favour transfer of particular compounds from one phase to another. Extraction performance is governed by partition behaviour, phase ratio, temperature, mixing, water content and the chemical identity of the target material. Consequently, laboratory or pilot evaluation is important before assigning it a role in a separation process.

Compared with more polar ketones, Methyl Isobutyl Ketone may provide a different balance between organic-phase affinity and water interaction. That distinction can be valuable when phase separation, selectivity or solvent recovery is important. However, extraction efficiency is not determined by solvent identity alone; impurities, emulsions, reaction conditions and downstream separation requirements may materially change the outcome in a particular process.

Formulation compatibility and material response

Methyl Isobutyl Ketone interacts with polymers, resins, oils and additives according to their molecular structure and formulation history. In adhesive or coating development, it may assist dissolution or viscosity adjustment, but excessive solvency can affect substrate sensitivity, polymer swelling or film formation. Small changes in resin type, molecular weight, solids level and co-solvent balance can therefore alter the observed response substantially.

A practical comparison may include methyl isobutyl carbinol, methyl ethyl ketone or selected esters, each of which presents a different combination of polarity, evaporation and compatibility. Methyl Isobutyl Ketone should be assessed through controlled compatibility checks, viscosity measurements and application trials relevant to the finished product. These evaluations help distinguish a useful solvent contribution from an unwanted effect on adhesion, gloss, flexibility or drying.

Handling concepts for a volatile ketone

Methyl Isobutyl Ketone is a volatile, flammable organic liquid, so work practices should address ignition sources, vapour accumulation, static discharge and inhalation exposure. Handling arrangements should follow the applicable safety information and local requirements, with suitable ventilation and controls selected for the operation. Transfer, mixing and application can produce different exposure patterns, making task-specific assessment important.

Its volatility also affects formulation losses, workplace odour and container-opening practices. Methyl Isobutyl Ketone should be kept away from incompatible conditions identified for the material, and contact with eyes or skin should be avoided through appropriate protective measures. Fire protection, spill response and waste arrangements should be designed for the actual quantity, process scale and surrounding chemicals rather than assumed from general solvent practice.

Frequently asked questions

Questions about Methyl Isobutyl Ketone

What is Methyl Isobutyl Ketone used for?

Methyl Isobutyl Ketone is an industrial ketone solvent used in selected coatings, adhesives, extraction systems and chemical-processing formulations. It can dissolve or help disperse certain resins, oils and organic materials, while also contributing to viscosity adjustment and evaporation control. In extraction work, its organic-phase behaviour may support separation of particular compounds when the process chemistry is appropriate. Actual suitability depends on the binder, solute, substrate, co-solvents, temperature and equipment involved. A particular use should therefore be confirmed through formulation or process testing rather than assumed from the solvent class alone.

How does Methyl Isobutyl Ketone differ from methyl ethyl ketone?

Methyl Isobutyl Ketone and methyl ethyl ketone are both ketone solvents, but their molecular structures give them different volatility, solvency balance and formulation behaviour. Methyl ethyl ketone is generally considered a faster-evaporating solvent, while Methyl Isobutyl Ketone can provide a less rapid evaporation profile and a different balance between hydrocarbon character and ketone polarity. The practical difference may influence open time, viscosity reduction, resin compatibility, film development and vapour management. Selection should be based on the complete formulation and application method, not on boiling or evaporation expectations alone. The final decision should consider the supplied Methyl Isobutyl Ketone specification, intended process and applicable requirements rather than the chemical name alone.

Can Methyl Isobutyl Ketone be used in paint and coating formulations?

Methyl Isobutyl Ketone can be used in selected paint and coating formulations as a solvent for compatible resins and additives. It may help establish application viscosity, improve wetting or influence drying and film formation. Its effect depends on the binder chemistry, pigment dispersion, solids content, co-solvent blend, substrate and application conditions. Excessive or poorly matched solvency can contribute to substrate attack, slow drying, surface defects or changes in gloss. Coating developers should compare it with alternative ketones, esters and hydrocarbon solvents through controlled compatibility and application trials. The final decision should consider the supplied Methyl Isobutyl Ketone specification, intended process and applicable requirements rather than the chemical name alone.

What factors affect Methyl Isobutyl Ketone extraction performance?

Methyl Isobutyl Ketone extraction performance depends on the chemical identity of the target, partition behaviour, water content, phase ratio, temperature, mixing intensity and residence time. Impurities or surfactant-like materials may create emulsions or hinder clean phase separation. The solvent can be useful for selected organic extraction systems, but it is not a universal extractant. Process developers should examine selectivity, recovery, solvent losses and downstream purification requirements at representative conditions. Pilot testing may reveal behaviour that is not apparent from a simple laboratory shake test, especially in multicomponent or water-containing systems.

Is Methyl Isobutyl Ketone miscible with water?

Methyl Isobutyl Ketone has limited interaction with water rather than behaving like a fully water-miscible ketone solvent. In many systems, this allows an organic phase and an aqueous phase to form, although the exact phase behaviour depends on temperature, dissolved substances and the presence of other solvents or additives. Small amounts of water may still influence density, partitioning, emulsion formation and drying. Users should determine actual phase separation and mutual solubility under process conditions, particularly when designing extraction, washing, coating or solvent-recovery operations. The final decision should consider the supplied Methyl Isobutyl Ketone specification, intended process and applicable requirements rather than the chemical name alone.

What handling considerations apply to Methyl Isobutyl Ketone?

Methyl Isobutyl Ketone is a volatile, flammable organic liquid, so handling should control ignition sources, vapour accumulation, static discharge and unnecessary exposure. Suitable ventilation, protective measures and fire precautions should be selected for the task, quantity and equipment configuration. Mixing and spraying can create different vapour or splash hazards from closed transfer, so one control approach may not fit every operation. Users should consult the applicable safety information and local requirements before work begins. Containers, transfer systems and waste arrangements should also be suitable for the material and surrounding chemicals.

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