133035
Methacrolein
95%
Sinónimos:
Methacrylaldehyde
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Fórmula lineal:
H2C=C(CH3)CHO
Número CAS:
Peso molecular:
70.09
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
EC Number:
201-150-1
Beilstein/REAXYS Number:
1209258
MDL number:
Assay:
95%
Form:
liquid
Servicio técnico
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Permítanos ayudarlevapor density
2.4 (vs air)
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
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.
signalword
Danger
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
Clase de almacenamiento
3 - Flammable liquids
wgk
WGK 3
flash_point_f
5.0 °F - closed cup
flash_point_c
-15 °C - closed cup
ppe
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
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S T Larsen et al.
Toxicology letters, 114(1-3), 197-202 (2000-03-14)
The acute respiratory effects of airborne exposure to methacrolein were studied in a recent refinement of the standard test method with mice (ASTM, 1984. American Society for Testing and Materials, Philadelphia). Irritation of the upper respiratory tract caused a concentration-dependent
Catalysis by heteropoly compounds: IV. Oxidation of methacrolein to methacrylic acid over 12-molybdophosphoric acid.
Konishi Y, et al.
J. Catal., 77(1), 169-179 (1982)
John D Crounse et al.
The journal of physical chemistry. A, 116(24), 5756-5762 (2012-03-29)
Peroxy radicals formed by addition of OH and O(2) to the olefinic carbon atoms in methacrolein react with NO to form methacrolein hydroxy nitrate and hydroxyacetone. We observe that the ratio of these two compounds, however, unexpectedly decreases as the