141-79-7
Mesityl oxide, mixture of alpha- and beta-isomers
CAS: 141-79-7
Molecular Formula: C6H10O
141-79-7 - Names and Identifiers
141-79-7 - Physico-chemical Properties
| Molecular Formula | C6H10O |
| Molar Mass | 98.143 |
| Density | 0.83g/cm3 |
| Melting Point | -53℃ |
| Boling Point | 132.7°C at 760 mmHg |
| Flash Point | 30.6°C |
| Water Solubility | 28 g/L (20℃) |
| Vapor Presure | 8.76mmHg at 25°C |
| Appearance | Form Liquid, Free Of Suspended Matter, color Clear |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.418 |
| Physical and Chemical Properties | Chemically colorless oily flammable liquid with a honey-like smell. The spontaneous ignition point is 344.44 ℃, melting point is -52.85 ℃, boiling point is 130-131 ℃, relative density is 0.86532(20/4 ℃), refractive index is 1.4434, flash point (closed cup) is 31 ℃, vapor pressure (20 ℃) is 1.160kPa, freezing point is -59 ℃, viscosity (20 ℃) is 0.6mPa · s. Soluble in water about 30 times, miscible with most organic solvents. |
| Use | It is used as a solvent for coatings and resins, as an intermediate for pharmaceuticals and pesticides, and as a raw material for the production of methyl isobutyl ketone and methyl isobutyl alcohol. |
141-79-7 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R10 - Flammable R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S25 - Avoid contact with eyes. |
| UN IDs | UN 1229 |
| WGK Germany | 1 |
| RTECS | SB4200000 |
| TSCA | Yes |
| HS Code | 2914 19 90 |
| Hazard Class | 3 |
| Packing Group | III |
| Toxicity | LD50 in mice (mg/kg): 710 ±85 intragastric; LC50 in mice (2 hr), rats (4 hr) (mg/m3): 10000 ±270, 9000 ±600 (Ismerov) |
141-79-7 - Upstream Downstream Industry
141-79-7 - Nature
Open Data Verified Data
A colorless oily flammable liquid with a honey-like odor. Spontaneous ignition point was 344. 44 ℃. The relative density (ct20) was 0. 86532. Boiling point 130~131 deg C. Vapor pressure (20 °c) 1. 160kPa. Freezing point -59 °c. Refractive index 4434. Viscosity (20 deg C) 0.6 mPa.s. Flash (closed cup) 31 °c. Soluble in about 30 times water, miscible with most organic solvents
Last Update：2024-01-02 23:10:35
141-79-7 - Safety
Open Data Verified Data
high toxicity, in (250~500)× 10-6, in addition to anesthesia, but also can cause proteinuria, urine turbidity and edema and other renal disorders. In 50 x 10-6, harmless to the human body, but the throat, eyes have a stimulating effect, its unpleasant smell can last 3 to 6 hours, even in 25 x 10-6, it also has a stimulating effect on the eye. The equipment is required to be sealed, and the operator should wear protective equipment. The maximum allowable concentration in air is 0.5 × 10-6.
Packed in 200 L(53 US gal) iron drum with a net weight of 160kg per barrel. Attention should be paid to fire prevention during storage and transportation, and flammable labels should be added to packaging products. According to the provisions of flammable chemicals storage and transportation.
Last Update：2022-01-01 10:17:09
141-79-7 - Nature
| FEMA | 3368 | 4-METHYL-3-PENTEN-2-ONE |
| refractive index | n20/D 1.442(lit.) |
| flash point | 87 °F |
| storage conditions | Store below +30°C. |
| solubility | 30g/l |
| morphology | Liquid, Free Of Suspended Matter |
| color | Clear |
| Odor | Strong; peppermint; honeylike. |
| explosion limit value (explosive limit) | 1.4-10.1%(V) |
| water solubility | 28 G/L (20 °C) |
| JECFA Number | 1131 |
| Merck | 14,5908 |
| BRN | 1361550 |
| Henry's Law Constant | (x 10-6 atm?m3/mol): 4.01 at 20°C (approximate - calculated from water solubility and vapor pressure) |
| exposure limit | TLV-TWA 60 mg/m3 (15 ppm) (ACGIH), 10-h TWA 40 mg/m3 (10 ppm) (NIOSH); STEL 100 mg/m3 (25 ppm); IDLH 5000 ppm. |
| NIST chemical information | 3-Penten-2-one, 4-methyl-(141-79-7) |
| EPA chemical information | Mesityl oxide (141-79-7) |
Last Update：2024-04-10 22:29:15
141-79-7 - Uses and synthesis methods
application
4-methyl-3penten-2-one is a ketone derivative that can be used as an organic intermediate.
use
1. this product is a medium boiling point strong solvent, which is used as a solvent for nitrocellulose and various resins, especially vinyl resin and spray paint. Important organic synthesis intermediates, mainly used in drugs, fine chemicals and pesticides. It is also a raw material for the production of methyl isobutyl (methyl) ketone and methyl isobutanol.
2. Used as a solvent for coatings and resins, can be used as an intermediate for drugs and pesticides, and is also a raw material for the production of methyl isobutyl ketone and methyl isobutyl alcohol
3, used as solvent and chromatographic reference
production method
acetone is condensed into diacetone alcohol in the presence of sodium hydroxide, diacetone alcohol is dehydrated in the presence of phosphoric acid, crude products at 126-131 ℃ are collected by fractionation, and then rectified to collect the fraction at 128-132 ℃ to obtain the finished product. The 1t product consumes about 1200kg of diacetone alcohol.
category
flammable liquids
toxicity classification
Poisoning
acute toxicity
oral-rat LD50: 1120 mg/kg; oral-mouse LD50: 710 mg/kg
stimulus data
skin-rabbit 430 mg mild; eyes-rabbit 20 mg severe
explosive hazard characteristics
Blowing with air
flammability hazard characteristics
It is more flammable in case of open flame, high temperature and oxidant; steam is irritating; combustion produces stimulating smoke
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored separately from the oxidant
fire extinguishing agent
Dry powder, carbon dioxide, foam, 1211 fire extinguishing agent
occupational standards
TWA 60 mg/m3; STEL 100 mg/m3
Last Update：2024-04-10 22:29:15
141-79-7 - Security information
| WGK Germany | 1 |
| RTECS number | SB4200000 |
| auto-ignition temperature | 344 °C |
| TSCA | Yes |
| customs code | 2914 19 90 |
| HazardClass | 3 |
| PackingGroup | III |
| toxic substance data | 141-79-7(Hazardous Substances Data) |
| Toxicity | LD50 in mice (mg/kg): 710 ±85 intragastric; LC50 in mice (2 hr), rats (4 hr) (mg/m3): 10000 ±270, 9000 ±600 (Ismerov) |
| immediate threat to life and health concentration | 1,400 ppm [10% LEL] |
Last Update：2024-04-10 22:29:15
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Spot supply
Product Name: Mesityl oxide, mixture of alpha- and beta-isomers Request for quotationCAS: 141-79-7
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3787852685
Spot supply
Product Name: Mesityl oxide, mixture of alpha- and beta-isomers Request for quotationCAS: 141-79-7
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3785839865
Spot supply
Product Name: *Cilastatin Impurity 4（Cilastatin EP Impurity D） Visit Supplier Webpage Request for quotationCAS: 141-79-7
Tel: 0714-3999186
Email: 2853786052@qq.com
Mobile: 86+15671228036
QQ: 2853786052
Wechat: 15671228036
Spot supply
Product Name: Mesityl oxide, mixture of alpha- and beta-isomers Request for quotationCAS: 141-79-7
Tel: 17505222756
Email: pules.cn@gmail.com
Mobile: +86-17551318830
Wechat: 17505222756
View History
Raw Materials for 141-79-7
Diacetone Alcohol
2,6-Dimethyl-4-heptanone
4-Methyl-3-penten-2-one oxime
2-Heptanone, 4-hydroxy-
4-Methyl-4-(methylnitrosoamino)-2-pentanone
Ethoxyquin
2,6-Dimethyl-4-heptanone
4-Methyl-3-penten-2-one oxime
2-Heptanone, 4-hydroxy-
4-Methyl-4-(methylnitrosoamino)-2-pentanone
Ethoxyquin
Downstream Products for 141-79-7