133035

Methacrolein

95%

• Synonym(s): Methacrylaldehyde
• Linear Formula: H₂C=C(CH₃)CHO
• CAS Number: 78-85-3
• Molecular Weight: 70.09
• Beilstein: 1209258
• EC Number: 201-150-1
• MDL number: MFCD00006974
• UNSPSC Code: 12352100
• PubChem Substance ID: 24848091
• NACRES: NA.22

Properties

• vapor density: 2.4 (vs air)
• Quality Level: 100
• vapor pressure: 121 mmHg ( 20 °C); 13.44 psi ( 55 °C); 5.35 psi ( 20 °C)
• Assay: 95%
• form: liquid
• refractive index: n20/D 1.416 (lit.)
• bp: 68-70 °C (lit.)
• mp: −81 °C (lit.)
• density: 0.85 g/mL at 25 °C (lit.)
• functional group: aldehyde
• storage temp.: 2-8°C
• SMILES string: [H]C(=O)C(C)=C
• InChI: 1S/C4H6O/c1-4(2)3-5/h3H,1H2,2H3
• InChI key: STNJBCKSHOAVAJ-UHFFFAOYSA-N

Description

General description

Methacrolein on oxidation over heteropoly acid catalysts (mainly 12-molybdophosphoric acid) at 300°C yields methacrylic acid. It is the major product of isoprene oxidation.

Application

Methacrolein was used to study the effect of parts per billion levels of limonene oxidation products and the terpene oxidation product, methacrolein on human eye blink frequency. It was also used in determination of rate constants and the products of the reactions between atomic chlorine and acrolein, methacrolein and methyl vinyl ketone.

Safety Information

• Pictograms: GHS02,GHS06,GHS08,GHS05,GHS09
• Signal Word: Danger
• Hazard Statements: H225,H301 + H311,H314,H330,H341,H410
• Precautionary Statements: P210 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 2 Inhalation - Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Flam. Liq. 2 - Muta. 2 - Skin Corr. 1B
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 3
• Flash Point(F): 5.0 °F - closed cup
• Flash Point(C): -15 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves