| Identification | More | [Name]
Methacrylic anhydride | [CAS]
760-93-0 | [Synonyms]
2-METHYL-2-PROPENOIC ACID ANHYDRIDE
2-METHYLPROPENOIC ANHYDRIDE
A-METHYLACRYLIC ANHYDRIDE
METHACRYLIC ANHYDRIDE
1-Methylacrylic anhydride
2-methyl-2-propenoicacianhydride
2-Propenoic acid, 2-methyl-, anhydride
2-Propenoicacid,2-methyl-,anhydride
Methacrylic acid anhydride
methacrylicacidanhydride
Methacryloyl anhydride
methacryloylanhydride
2-Methylacrylic acid anhydride
METHACRYLIC ANHYDRIDE, STAB.
METHACRYLIC ANHTDRIDE
Methacrylsureanhydrid
Methacrylic anhydride, 94%, stab. with ca 0.2% 2,4-dimethyl-6-tert-butylphenol
2-Methyl-prop-2-enoic acid anhydride
Bis(methacrylic acid)anhydride
Bismethacrylic anhydride | [EINECS(EC#)]
212-084-8 | [Molecular Formula]
C8H10O3 | [MDL Number]
MFCD00008586 | [Molecular Weight]
154.16 | [MOL File]
760-93-0.mol |
| Chemical Properties | Back Directory | [Appearance]
liquid | [Melting point ]
-20°C | [Boiling point ]
87 °C13 mm Hg(lit.)
| [density ]
1.04 g/mL at 20 °C
| [vapor pressure ]
90Pa at 20℃ | [refractive index ]
n20/D 1.453(lit.)
| [Fp ]
184 °F
| [storage temp. ]
Inert atmosphere,2-8°C | [solubility ]
Miscible with ethanol and ether. | [form ]
clear liquid | [color ]
Colorless to Light yellow to Light orange | [Stability:]
Stable. Flammable. Moisture-sensitive. | [Water Solubility ]
98g/L at 20℃ | [Sensitive ]
Moisture Sensitive | [BRN ]
1761982 | [InChIKey]
DCUFMVPCXCSVNP-UHFFFAOYSA-N | [LogP]
1.23 | [CAS DataBase Reference]
760-93-0(CAS DataBase Reference) | [NIST Chemistry Reference]
Methacrylic anhydride(760-93-0) | [EPA Substance Registry System]
760-93-0(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R20:Harmful by inhalation.
R37/38:Irritating to respiratory system and skin .
R41:Risk of serious damage to eyes. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S39:Wear eye/face protection . | [RIDADR ]
UN 3265 8/PG 2
| [WGK Germany ]
1
| [RTECS ]
OZ5700000
| [F ]
10-21 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
29161900 | [Hazardous Substances Data]
760-93-0(Hazardous Substances Data) |
| Hazard Information | Back Directory | [General Description]
Liquid. | [Reactivity Profile]
METHACRYLIC ANHYDRIDE(760-93-0) reacts exothermically with water. The reactions are sometimes slow, but can become violent when local heating accelerates their rate. Acids accelerate the reaction with water. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. | [Air & Water Reactions]
Reacts exothermically with water to form methacrylic acid. | [Fire Hazard]
(Non-Specific--Methacrylic Acid) This material may burn but may not ignite readily. Flammable/ poisonous gases may accumulate in tanks and hopper cars. Some of these materials may ignite combustibles (wood, paper, oil, etc.). | [Chemical Properties]
liquid | [Uses]
Methacrylic anhydride is a reactive monomer used for the preparation of different type of monomers under mild reaction conditions. It finds applications in light-curing coatings, cross-linked materials like synthetic resin. It acts as an intermediate for the preparation of fibers and resins. | [Preparation]
To synthesize Methacrylic anhydride, sodium methacrylate (1 mol), propionyl chloride (3 mol), and a polymerization inhibitor (0.1 mol) were added to a reaction kettle. The mixture was heated to 90-100 ℃ and refluxed for 8 hours. Methacrylic anhydride was then obtained by distilling and collecting fractions at 100-105 ℃. The yield of the product was 98.33%. | [Synthesis]
In a 300 ml four-necked flask equipped with a stirrer and a thermometer, pure air was charged with 148.6 mL of acetone, 49.5 g (0.46 mol) of potassium methacrylate, 49.5 mg of 4-methoxyphenol, and 49.5 mg of phenothiazine under an ice bath. It was stirred and dispersed. 25.0 g (0.22 mol) of MsCl was added dropwise thereto over 30 minutes. Then, the mixture was stirred under an ice bath, and when it was confirmed that the exotherm had subsided, the outside temperature was set to 25 ° C., and the reaction was followed by GC while aging for 1 hour. As a result, it was confirmed that MsCl had disappeared. The conversion rate of the crude body was 99.0%. After completion of the reaction, the mixture was filtered using a filter paper, washed with 100 mL of acetone three times, and then acetone was distilled off under reduced pressure to obtain 27.8 g of crude methacrylic anhydride (crude yield 101.0% with respect to MsCl, GC). Purity 98.0%) was obtained. Subsequently, the crude product was distilled under reduced pressure under pure air to obtain 26.1 g of methacrylic anhydride (b.p.53 ° C. (O.4 kPa), yield 94.8% with respect to MsCl, GC purity 99.6%). | [Purification Methods]
Distil the anhydride at 2mm pressure, immediately before use, in the presence of hydroquinone. [Beilstein 2 IV 1537.] |
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