141-79-7
Product Name:
Mesityl oxide
Formula:
C6H10O
Synonyms:
4-Methyl-3-penten-2-one;Isopropylideneacetone, 4-Methyl-3-penten-2-one;Mesityl oxide
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Mesityl oxide appears as a colorless, oily liquid with a pungent honey-like odor. Flash point 87 °F. Less dense than water and slightly soluble in water. Vapors heavier than air. Used in paint removers, as a solvent for plastics, and as an insect repellent. |
|---|---|
| Color/Form | Oily, colorless to light-yellow liquid |
| Odor | ... spearmint ... |
| Taste | OILY TASTE |
| Boiling Point | 266 °F at 760 mmHg (USCG, 1999) |
| Melting Point | -51 °F (USCG, 1999) |
| Flash Point | 73 °F (USCG, 1999) |
| Solubility | 3 % (NIOSH, 2023) |
| Density | 0.853 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Vapor Density | 3.4 (Air = 1) |
| Vapor Pressure | 9 mmHg (NIOSH, 2023) |
| LogP | 1.7 |
| Autoignition Temperature | 652 °F (USCG, 1999) |
| Decomposition | When heated to decomposition it emits acrid smoke and irritating fumes. |
| Viscosity | 0.0060 cP at 20 °C |
| Heat of Combustion | -14,400 BTU/LB= -8,000 CAL/G= -330X10+5 JOULES/KG |
| Heat of Vaporization | 157 BTU/LB= 87 CAL/G= 3.7X10+5 JOULES/KG |
| Surface Tension | 22.9 DYNES/CM= 0.0029 NEWTONS/M @ 20 °C |
| Ionization Potential | 9.08 eV |
| Odor Threshold | Odor Threshold Low: 0.01 [mmHg] Odor Threshold High: 12.0 [mmHg] Detection odor threshold from AIHA (mean = 0.017 ppm) |
| Refractive Index | Index of refraction: 1.4425 at 22 °C/D |
| Relative Evaporation Rate | 8.4 (ETHER= 1) |
| Kovats Retention Index | 778 782 778.4 783 780 783 787 |
| Other Experimental Properties | May darken upon standing |
| Chemical Classes | Other Classes -> Aliphatic Ketones, Other |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Skull and Crossbones Acute Toxicity GHS06 |
| GHS Hazard Statements |
H226:Flammable liquids H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H331:Acute toxicity,inhalation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 98.14 g/mol |
|---|---|
| XLogP3 | 1.4 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 1 |
| Rotatable Bond Count | 1 |
| Exact Mass | 98.073164938 g/mol |
| Monoisotopic Mass | 98.073164938 g/mol |
| Topological Polar Surface Area | 17.1 Ų |
| Heavy Atom Count | 7 |
| Formal Charge | 0 |
| Complexity | 96.7 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Mesityl oxide appears as a colorless, oily liquid with a pungent honey-like odor. Flash point 87 °F. Less dense than water and slightly soluble in water. Vapors heavier than air. Used in paint removers, as a solvent for plastics, and as an insect repellent.