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 an aliphatic ketone with characteristic solvent properties and moderate volatility. This branched-chain ketone, also known by its IUPAC name 3-methylbutan-2-one, represents an important member of the methyl ketone family widely utilized in industrial applications. With the molecular formula C5H10O and a molecular weight of 86.13 g/mol, this compound exhibits typical ketone functionality while offering unique properties derived from its branched carbon structure. The substance is classified as a Category 2 flammable liquid under GHS regulations, requiring appropriate handling precautions and storage conditions. Its ADR Class 3 classification reflects its flammable nature, making proper ventilation and ignition source control essential during industrial use. The GHS02 pictogram indicates the fire hazard associated with this material, necessitating compliance with relevant safety protocols. 3-Methylbutan-2-one finds primary applications as a solvent in coating formulations, paint thinners, and extraction processes where its moderate polarity and volatility characteristics prove advantageous. The chemical industry also employs this ketone as an intermediate in organic synthesis and as a component in specialty chemical formulations. Its solvent properties make it particularly suitable for applications requiring controlled evaporation rates, similar to other industrial solvents like ethyl propanoate, though with distinct performance characteristics. The compound's branched structure provides enhanced stability compared to linear ketones while maintaining effective solvency for various organic materials. This combination of properties makes it valuable in formulations requiring specific viscosity and drying characteristics. OYSI maintains reliable supply chains for 3-methylbutan-2-one to support diverse industrial applications across European markets.

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 aliphatic ketones. It is classified as a flammable liquid under GHS regulations, requiring careful handling and storage. The compound features a ketone functional group at the second carbon position with a methyl branch at the third carbon of the butane chain.

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 good solubility in most organic solvents and limited solubility in water due to its hydrophobic alkyl chains. The compound has a relatively low boiling point and high volatility, contributing to its flammable nature. Its ketone structure provides polar characteristics while maintaining overall lipophilic properties, making it useful in various chemical applications.

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

3-methylbutan-2-one is primarily used as an organic solvent in various industrial applications including paint formulations, coatings, and adhesives. It serves as an intermediate in organic synthesis and chemical manufacturing processes. The compound is also utilized in the production of specialty chemicals and as a solvent for resins, polymers, and other organic materials. Its ketone functionality makes it valuable in chemical reactions requiring polar aprotic solvents or carbonyl-containing reagents.

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

3-methylbutan-2-one requires careful handling due to its Flam. Liq. 2 classification and Danger signal word. Essential safety equipment includes chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas or use local exhaust ventilation to control vapor exposure. Keep away from ignition sources, heat, and sparks. Use non-sparking tools and ensure proper grounding of equipment. Emergency eyewash stations and safety showers should be readily accessible when handling this flammable ketone.

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 due to its flammable nature. Use tightly sealed, compatible containers made of materials resistant to ketones. Store separately from strong oxidizing agents, acids, and bases to prevent dangerous reactions. Maintain storage temperatures below the flash point and ensure proper fire suppression systems are available. Keep containers properly labeled and implement appropriate inventory management to prevent degradation.

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, rinse immediately with plenty of clean water for 15-20 minutes and seek medical attention. If inhaled, move the person to fresh air and provide respiratory support if needed. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult safety data sheets for specific first aid measures.

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

3-methylbutan-2-one must be disposed of as hazardous waste according to local and European regulations including the Waste Framework Directive. Contact licensed waste disposal companies specialized in flammable organic solvents. Never discharge into sewers, waterways, or soil. Small quantities can be recovered through distillation for reuse when economically viable. Contaminated containers should also be treated as hazardous waste. Always consult local environmental authorities for specific disposal requirements and authorized treatment facilities in your region.

How to transport 3-methylbutan-2-one?

3-methylbutan-2-one is classified under ADR Class 3 (Flammable Liquids), Packing Group II, requiring compliance with dangerous goods transport regulations. Use UN-approved packaging suitable for flammable liquids with proper labeling including GHS02 pictogram. Transport vehicles must be equipped with appropriate fire extinguishing equipment and emergency response information. Drivers require ADR certification for Class 3 materials. Ensure proper documentation including transport documents and emergency response procedures are available during shipment.

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

3-methylbutan-2-one is subject to European REACH regulation requiring registration for import/manufacture above one tonne annually. The compound falls under CLP regulation for classification and labeling as Flam. Liq. 2 with Danger signal word. It is not currently listed as an SVHC (Substance of Very High Concern). Industrial users must comply with workplace exposure limits and safety requirements. Transportation is regulated under ADR as Class 3 dangerous goods, and disposal must follow hazardous waste regulations.

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

3-methylbutan-2-one is available through OYSI, a trusted European distributor of specialty chemicals serving industrial customers across the continent. OYSI provides reliable supply chains with proper documentation including safety data sheets, certificates of analysis, and regulatory compliance information. As a professional chemical distributor, OYSI ensures quality products meeting European standards with appropriate packaging for safe transport. Contact OYSI directly for availability, technical specifications, and logistics support for your 3-methylbutan-2-one requirements.

Data Sources

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