Butanone
General
Other names	Methyl ethyl ketone (MEK) Methylpropanone
Molecular formula	C4H8O CH3COC2H5
SMILES	CCC(=O)C
Molar mass	72.11 g/mol
Appearance	Colorless liquid
CAS number	[78-93-3]
Properties
Density and phase	0.8050 g/cm3, liquid
Solubility in water	29 g/100 ml (20 °C)
Melting point	−86 °C (187 K)
Boiling point	80 °C (353 K)
Viscosity	? cP at ? °C
Structure
Molecular shape	?
Dipole moment	? D
Hazards
MSDS	External MSDS
EU classification	Flammable (F) Irritant (Xi)
NFPA 704
R-phrases	R11, R36, R66, R67
S-phrases	S2, S9, S16
Flash point	−9 °C
Autoignition temperature	505 °C
RTECS number	EL6475000
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Related Ketones	Acetone Pentan-3-one 3-Methylbutanone
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

2-Butanone is a manufactured organic chemical but it is also present in the environment from natural sources. It is a colorless liquid with a sharp, sweet odor. It is a ketone, also known as methyl ethyl ketone (MEK). Image File history File links Download high resolution version (251x623, 2 KB) Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII strings. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... The pitch drop experiment at the University of Queensland. ... The poise (P) is the cgs unit of viscosity, 1 P = 1 g·cm-1·s-1 The SI analog is 1 pascal second (Pa·s) = 1 kg·m-1·s-1 = 10 P. It is named after Jean Louis Marie Poiseuille. ... four sp³ orbitals three sp² orbitals In chemistry, hybridisation is the mixing of atomic orbitals belonging to a same electron shell to form new orbitals suitable for the qualitative description of atomic bonding properties. ... The Earths magnetic field, which is approximately a dipole. ... The debye (symbol: D) is a non-SI and non-CGS unit of electrical dipole moment. ... A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ... Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (as amended) is the main source of European Union law concerning chemical safety. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... The flash point of a fuel is the lowest temperature at which it can form an ignitable mix with air. ... The autoignition temperature of a substance is the lowest temperature at which a chemical will spontaneously combust in a normal atmosphere, without an external source of ignition, such as a flame or spark. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... The refractive index of a material is the factor by which the phase velocity of electromagnetic radiation is slowed relative to vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... It has been suggested that Mass spectrum be merged into this article or section. ... Ketone group A ketone is either the functional group characterized by a carbonyl group linked to two other carbon atoms or a chemical compound that contains this functional group. ... R-phrases , , , S-phrases , , , Flash point -20 °C Autoignition temperature 465 °C RTECS number AL31500000 Supplementary data page Structure & properties n, εr, etc. ... This can also be called diethyl ketone. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... Organic chemistry is the part of chemistry concerned with the composition, structure, properties, reactions and synthesis of organic compounds. ... Ketone group A ketone is either the functional group characterized by a carbonyl group linked to two other carbon atoms or a chemical compound that contains this functional group. ...

2-Butanone is produced in large quantities. Nearly half of it is used in paints and other coatings because it will quickly evaporate. It dissolves many substances and is used as a solvent in processes involving gums, resins, cellulose acetate and cellulose nitrate. It is also used in the synthetic rubber industry, in the production of paraffin wax and in household products such as lacquer, varnishes, paint remover, a denaturing agent for denatured alcohol, glues and as a cleaning agent. It is used for synthesis of methyl ethyl ketone peroxide, a catalyst for some polymerization reactions. It is highly flammable. It is not considered a large health threat. It has been suggested that Dutch process paint be merged into this article or section. ... For the connotation of the term relating to chemistry, see Solvation. ... A solvent is a liquid that dissolves a solid, liquid, or gaseous solute, resulting in a solution. ... GUM may refer to one of the following. ... Insect trapped in resin. ... Cellulose (C6H10O5)n is a long-chain polymeric polysaccharide carbohydrate, of beta-glucose. ... Acetate, or ethanoate, is the anion of a salt or ester of acetic acid. ... In inorganic chemistry, a nitrate is a salt of nitric acid. ... In chemistry, the phrase chemical synthesis appears to have one of two meanings. ... Rubber is an elastic hydrocarbon polymer which occurs as a milky emulsion (known as latex) in the sap of a number of plants but can also be produced synthetically. ... Paraffin is a common name for a group of high molecular weight alkane hydrocarbons with the general formula CnH2n+2, where n is greater than about 20, discovered by Carl Reichenbach. ... Wax has traditionally referred to a substance that is secreted by bees (beeswax) and used by them in constructing their honeycombs. ... In a general sense, lacquer is a clear or colored coating, that dries by solvent evaporation only and that produces a hard, durable finish that can be polished to a very high gloss, and gives the illusion of depth. ... Varnish is a finish applied to wood or other surfaces in order to provide a clear, hard, durable, protective finish. ... Denatured alcohol is ethanol with added adulterants that make it useless for consumption as an intoxicating beverage by rendering it toxic or extremely distasteful to drink, but still useful for industrial processes or as a household chemical. ... An adhesive is a compound that adheres or bonds two items together. ... Methyl ethyl ketone peroxide (MEKP) is an organic peroxide, a high explosive similar to acetone peroxide, and is quite dangerous to synthesize. ... Polymerization is a process of reacting monomer molecules together in a chemical reaction to form linear chains or a three-dimensional network of polymer chains [1]. There are many forms of polymerization and different systems exist to categorize them. ... Flammable or Flammability refers to the ease at which a substance will ignite, causing fire or combustion. ...

2-Butanone occurs as a natural product. It is made by some trees and found in some fruits and vegetables in small amounts. It is also released to the air from car and truck exhausts. For other uses, see Tree (disambiguation). ... Fruit stall in Barcelona, Catalonia. ... Vegetables in a market Venn diagram representing the relationship between (botanical) fruits and vegetables. ... An automobile is a wheeled vehicle that carries its own motor. ... The driver of this DAF tractor with an auto-transport semi-trailer prepares to offload Skoda Octavia cars in Cardiff, Wales For other meanings, see Truck (disambiguation). ...

Health effects

The known health effects to people from exposure to 2-butanone are irritation of the nose, throat, skin, and eyes. There are no known cases of any humans dying from breathing 2-butanone alone. However, if 2-butanone is breathed along with other chemicals that damage health, it can increase the amount of damage that occurs. Health effects, health impacts or health risks are an important consideration in many areas, such as hygiene, pollution studies, workplace safety, nutrition and health sciences in general. ... Irritation is an observable physiological reaction to a stimulus that the organism instinctually avoids. ... Human nose in profile You may be looking for Nose, a town in Japan, or The Nose, a story by Nikolai Gogol and an opera by Dmitri Shostakovich. ... Anatomy In anatomy, the throat is the part of the neck anterior to the vertebral column. ... Diagram of the layers of human skin In zootomy and dermatology, skin is an organ of the integumentary system made up of a layer of tissues that protect underlying muscles and organs. ... This article refers to the sight organ. ...

Serious health effects in animals have been seen only at very high levels. When breathed, these effects included birth defects, loss of consciousness, and death. When swallowed, rats had nervous system effects including drooping eyelids and uncoordinated muscle movements. There was no damage to the ability to reproduce. Mice who breathed low levels for a short time showed temporary behavioral effects. Mild kidney damage was seen in animals that drank water with low levels of 2-butanone for a short time. A congenital disorder is a medical condition or defect that is present at or before birth (for example, congenital heart disease). ... Consciousness is a quality of the mind generally regarded to comprise such key features as subjectivity, self-awareness, sentience, sapience, and the ability to perceive the relationship between oneself and ones environment. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Species 50 species; see text *Several subfamilies of Muroids include animals called rats. ... The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions. ... Human kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ...

There are no long-term studies with animals either breathing or drinking 2-butanone.

Methyl ethyl ketone is listed as a Table II precursor under the United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances[1]. United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances Opened for signature December 20, 1988[1] at Vienna Entered into force November 11, 1990[2] Conditions for entry into force 20 ratifications Parties 170[3] The 1988 United Nations Convention Against Illicit Traffic in Narcotic Drugs and...

External links

• International Chemical Safety Card 0179
• National Pollutant Inventory - Methyl Ethyl Ketone Fact Sheet
• NIOSH Pocjet Guide to Chemical Hazards
• US EPA Datasheet
• European Chemicals Bureau
• US NIH list of products that contain butanone (MEK)

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