3-methylbutan-2-one

C5H10O

CAS563-80-4
GHS02 Gefahrensymbol: Entzündbar – Flamme
Danger

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Identification

CAS Number
563-80-4
EC Number
209-264-3
UN Number
2397
Index Number
606-007-00-0
PubChem CID
11251

Physical-chemical properties

Molecular Formula
C5H10O
Molar Mass
86.13 g/mol
IUPAC Name
3-methylbutan-2-one

Chemical Identifiers

InChI
InChI=1S/C5H10O/c1-4(2)5(3)6/h4H,1-3H3
InChI Key
SYBYTAAJFKOIEJ-UHFFFAOYSA-N

Overview

3-methylbutan-2-one (CAS 563-80-4) is a branched methyl ketone with characteristic solvent properties and moderate volatility. This five-carbon ketone compound, also known by its IUPAC designation 3-methylbutan-2-one, represents an important class of organic solvents widely utilized across various industrial applications. With its molecular formula C5H10O and molecular weight of 86.13 g/mol, this branched ketone exhibits distinctive chemical and physical properties that make it valuable for specialized technical applications. The compound is classified as a Category 2 flammable liquid under GHS regulations, requiring careful handling protocols and appropriate safety measures during storage and use. Its flammability characteristics place it in ADR Class 3 for transportation purposes, necessitating compliance with hazardous materials shipping requirements. The GHS02 flame pictogram and "Danger" signal word indicate the serious fire hazard associated with this substance. From a chemical perspective, 3-methylbutan-2-one shares certain solvent characteristics with other industrial chemicals such as ethyl propanoate and 2-methylpropyl acetate, though each compound offers distinct performance profiles for specific applications. Its branched structure influences both its physical properties and reactivity patterns compared to linear ketone alternatives. Primary industrial applications include use as a specialized solvent in chemical synthesis processes, as an intermediate in organic chemical manufacturing, and in formulations requiring specific volatility and dissolution characteristics. The compound's unique molecular structure makes it particularly suitable for applications where conventional linear ketones may not provide optimal performance. OYSI maintains reliable supply channels for 3-methylbutan-2-one to serve the diverse requirements of European industrial customers across multiple sectors.

Safety & Classification

Danger
Classification:

Flam. Liq. 2

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H225

Highly flammable liquid and vapour.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Transport (ADR)

UN Number2397
ADR Class3
Packing GroupII
Tunnel CodeD/E
Proper Shipping Name3-Methylbutan-2-on
Marine PollutantNo

Frequently Asked Questions

What is 3-methylbutan-2-one?

3-methylbutan-2-one is an organic ketone compound with the molecular formula C5H10O and CAS number 563-80-4. This branched-chain ketone has a molecular weight of 86.13 g/mol and belongs to the family of methyl ketones. It is classified as a flammable liquid under GHS regulations with danger classification Flam. Liq. 2, requiring careful handling due to its fire hazard properties.

What are the physicochemical properties of 3-methylbutan-2-one?

3-methylbutan-2-one is a colorless liquid ketone with a characteristic sweet, fruity odor typical of ketones. As an organic solvent, it exhibits moderate polarity and is miscible with most organic solvents while having limited water solubility. The compound has a relatively low boiling point and high vapor pressure, contributing to its flammable nature and requiring proper ventilation during use.

What is 3-methylbutan-2-one used for?

3-methylbutan-2-one serves primarily as an organic solvent in various industrial applications including paint and coating formulations, adhesives, and chemical synthesis processes. It is used as an intermediate in pharmaceutical manufacturing and as a solvent for resins, plastics, and other organic materials. The compound also finds application in the production of specialty chemicals and as a cleaning agent in industrial processes.

How to handle 3-methylbutan-2-one safely?

3-methylbutan-2-one requires careful handling due to its flammable nature (Flam. Liq. 2 classification). Essential safety measures include wearing appropriate personal protective equipment such as safety goggles, chemical-resistant gloves, and protective clothing. Work in well-ventilated areas or under fume hoods, eliminate ignition sources, and use explosion-proof electrical equipment. Ground all containers and use non-sparking tools to prevent static discharge.

How to store 3-methylbutan-2-one correctly?

3-methylbutan-2-one must be stored in a cool, dry, well-ventilated area away from heat sources, sparks, and open flames. Use tightly sealed containers made of compatible materials and store in designated flammable liquid storage areas. Keep away from oxidizing agents and incompatible materials. Storage areas should be equipped with appropriate fire suppression systems and maintained at temperatures below the compound's flash point.

What to do in case of contact with 3-methylbutan-2-one?

In case of skin contact with 3-methylbutan-2-one, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for 15-20 minutes and seek medical attention. If inhaled, move the person to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention.

How to dispose of 3-methylbutan-2-one properly?

3-methylbutan-2-one must be disposed of as hazardous waste according to local and national environmental regulations. The compound cannot be disposed of in regular waste streams due to its flammable properties. Contact licensed waste disposal companies for proper collection and treatment. Small quantities may be recovered through distillation for reuse, while contaminated materials require specialized incineration at authorized facilities.

How to transport 3-methylbutan-2-one?

3-methylbutan-2-one is classified under ADR Class 3 (flammable liquids), Packing Group II, requiring specific transport regulations compliance. The substance must be packaged in UN-approved containers and labeled with appropriate hazard markings including GHS02 pictogram. Transport vehicles must comply with ADR requirements for flammable liquids, including proper ventilation, fire extinguishing equipment, and driver certification for dangerous goods transport.

Is 3-methylbutan-2-one subject to specific regulations?

3-methylbutan-2-one is subject to standard chemical regulations under REACH and CLP in Europe, requiring safety data sheets and proper classification labeling. The compound is not identified as a Substance of Very High Concern (SVHC) under REACH. Users must comply with workplace exposure limits, environmental discharge restrictions, and transportation regulations for flammable liquids. Industrial users may need permits for storage and handling of significant quantities.

Where to buy 3-methylbutan-2-one in Europe?

3-methylbutan-2-one is available through OYSI, a leading European distributor of specialty chemicals and industrial solvents. OYSI provides this compound to various industries including pharmaceuticals, coatings, and chemical manufacturing across Europe. As an established chemical distributor, OYSI ensures proper documentation, regulatory compliance, and reliable supply chains for 3-methylbutan-2-one and related organic solvents to professional users.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.