Methyl isobutyl ketone (MIBK)

Methyl Isobutyl Ketone (MIBK), also known as Hexone (CAS 108-10-1), is a colorless, stable liquid belonging to the ketone family. It is widely recognized as a versatile, high-performance solvent with excellent solvency for a broad range of materials, including nitrocellulose, vinyl resins, and various natural and synthetic gums. MIBK has a characteristic, slightly sweet odor and is a preferred choice in industries requiring precise control over evaporation rates and viscosity. Its dual functionality as a powerful solvent and an effective extraction agent makes it indispensable in specialty chemical manufacturing.

Basic Information of MIBK

CAS No.:	108-10-1
EC No.:	203-550-1
Linear Formula:	C6H12O
Molecular Weight:	100.16
Appearance:	Colorless, clear liquid
Odor:	Characteristic, sweet, ketone odor
Melting Point:	-80 °C (lit.)
Boiling Point:	117-118 °C
Density:	0.801 g/mL at 25 °C (lit.)
Solubility:	Slightly soluble in water; fully miscible with most organic solvents.
Flash Point:	56 °F
RIDADR:	UN 1245 3/PG 2
Chemical Structure:

Application Overview

MIBK is highly valued for its solvency and is utilized extensively across diverse industrial sectors, with key applications including:

• Coatings and Thinners: It is a primary solvent in the formulation of high-solids coatings, nitrocellulose lacquers, vinyl resin coatings, and thinners. Its medium evaporation rate ensures excellent flow, leveling, and blush prevention in the drying film.

• Chemical Extraction Agent: MIBK is widely used as an effective liquid-liquid extraction solvent, particularly in the pharmaceutical industry for purifying drugs and in the chemical industry for extracting high-value compounds like specific organic acids and inorganic salts (e.g., uranium extraction).

• Adhesives and Sealants: Due to its strong solvency for acrylics and resins, it is incorporated into various adhesives, printing inks, and protective coatings to control viscosity and application properties.

• Solvent for Synthesis: It serves as a reaction solvent in various chemical synthesis processes, including the manufacture of isobutyl ketone peroxide, which is a common catalyst/initiator.

• Cleaning and Degreasing: Used as a heavy-duty industrial cleaner and degreaser for specific resins, oils, and equipment where lesser solvents are ineffective.

• Trace Moisture Control: For sensitive synthesis and coating applications, moisture contamination is detrimental. Our MIBK is guaranteed to have exceptionally low water content, monitored via Karl Fischer titration, ensuring stable solvent performance and preventing side reactions or premature curing.

• Residue-Free Certification: We certify our MIBK for minimal Non-Volatile Residue (NVR). This superior purity is crucial for high-specification electronics cleaning, high-solids coatings, and pharmaceutical extraction, where any residue upon evaporation is unacceptable.

• Dedicated Flammable Logistics: Given MIBK's low flash point (14°C) and UN Class 3 classification, we utilize specialized, compliant bulk tankers and drums with inert gas blanketing. This rigorous handling protocol ensures safe, compliant delivery and maintains product integrity during transit.

Hazards Classification

• GHS Classification: Flammable Liquid (GHS02), Acute Toxicity – Inhalation (GHS07), Specific Target Organ Toxicity – Single Exposure (GHS07), Carcinogenicity (GHS08)

• Hazard Statements: Highly flammable liquid and vapour; Harmful if inhaled; Causes serious eye irritation; May cause respiratory irritation; May cause drowsiness or dizziness; Suspected of causing cancer.

• UN Number: UN 1245

• Hazard Class: 3 (Flammable Liquids)

• Packing Group: II