Mesityl oxide

{{chembox

| Watchedfields = changed

| verifiedrevid = 426873209

| Name = Mesityl oxide

| ImageFile_Ref = {{chemboximage|correct|??}}

| ImageFile = Mesityl oxide.png

| ImageName = Mesityl oxide

| ImageFile1 = Mesityl-oxide-3D-balls.png

| ImageFile2 = Mesityl-oxide-3D-vdW.png

| PIN = 4-Methylpent-3-en-2-one

| OtherNames = Mesityl oxide
Isobutenyl methyl ketone
Methyl isobutenyl ketone
Isopropylidene acetone

|Section1={{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 8526

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/C6H10O/c1-5(2)4-6(3)7/h4H,1-3H3

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = SHOJXDKTYKFBRD-UHFFFAOYSA-N

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 141-79-7

| PubChem = 8858

| EINECS = 205-502-5

| ChEBI = 89993

| ChEMBL = 3185916

| DTXSID = DTXSID1029170

| UNNumber = 1229

| UNII = 77LAC84669

| SMILES = O=C(\C=C(/C)C)C

| InChI = 1/C6H10O/c1-5(2)4-6(3)7/h4H,1-3H3

| RTECS = SB4200000

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|Section2={{Chembox Properties

| C=6 | H=10 | O=1

| Density = 0.858 g/cm³

| Appearance = Oily, colorless to light-yellow liquid

| Odor = peppermint- or honey-like

| Solubility = 3% (20°C)

| Solvent = other solvents

| SolubleOther = Soluble in most organic solvents

| MeltingPtC = −53

| BoilingPtC = 129.5

| Viscosity =

| RefractIndex = 1.442

| VaporPressure = 9 mmHg (20°C)

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|Section3={{Chembox Structure

| Dipole =

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|Section7={{Chembox Hazards

| ExternalSDS =

| MainHazards = flammable

| FlashPtF = 87

| FlashPt_ref =

| GHSPictograms = {{GHS02}}{{GHS07}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|226|302|312|332}}

| PPhrases = {{P-phrases|210|233|240|241|242|243|261|264|270|271|280|301+312|302+352|303+361+353|304+312|304+340|312|322|330|363|370+378|403+235|501}}

| IDLH = 1400 ppm{{PGCH|0385}}

| LC50 = 1000 mg/m³ (rat, 4 hr)
9000 mg/m³ (rat, 4 hr)
10,000 mg/m³ (mouse, 2 hr)
2000 mg/m³ (guinea pig, 7 hr){{IDLH|141797|Mesityl oxide}}

| LD50 = 1120 mg/kg (rat, oral)
1000 mg/kg (rabbit, oral)
710 mg/kg (mouse, oral)

| REL = TWA 10 ppm (40 mg/m³)

| PEL = TWA 25 ppm (100 mg/m³)

| ExploLimits = 1.4–7.2%

}}

|Section8={{Chembox Related

| OtherCompounds = diacetone alcohol
acetone,
benzylideneacetone

}}

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Mesityl oxide is a α,β-unsaturated ketone with the formula CH₃C(O)CH=C(CH₃)₂. This compound is a colorless, volatile liquid with a honey-like odor.Merck Index, 14th Edition