Catalog Number
ACMA00017371
Product Name
Methacrylaldehyde
Description
Methacrylaldehyde appears as a colorless liquid. Less dense than water. May be toxic by ingestion, inhalation and skin absorption. Severely irritating to skin and eyes. Used to make plastics.;Liquid;COLOURLESS LIQUID WITH PUNGENT ODOUR. TURNS PALE YELLOW ON EXPOSURE TO LIGHT AND AIR.;COLOURLESS-TO-YELLOW LIQUID WITH PUNGENT ODOUR.
IUPAC Name
2-methylprop-2-enal
Molecular Weight
70.09g/mol
Molecular Formula
C4H6O;CH3CH=CHCHO;C4H6O;CH2=C(CH3)CHO;C4H6O
Canonical SMILES
CC(=C)C=O
InChI
InChI=1S/C4H6O/c1-4(2)3-5/h3H,1H2,2H3
InChI Key
STNJBCKSHOAVAJ-UHFFFAOYSA-N
Boiling Point
68.4 °C;68.4 °C;104 °C;68 °C
Melting Point
-81.0 °C;-81 °C;-76.5 °C (trans), -69 °C (cis);-81 °C
Flash Point
35 °F (NFPA, 2010);35 °F (2 °C) (OPEN CUP);13 °C c.c.;-15 °C
Density
0.849 @ 25 °C/4 °C;Relative density (water = 1): 0.85;Relative density (water = 1): 0.8
Solubility
0.81 M;MISCIBLE WITH WATER, ETHANOL, ETHER;Water solubility = 5.9% (59,000 mg/L) at 20 °C;Solubility in water, g/100ml at 20 °C: 15-18 (freely soluble);Solubility in water, g/100ml at 20 °C: 6 (soluble)
Color/Form
COLORLESS LIQUID
Covalently-Bonded Unit Count
1
Heat of Vaporization
29.0 kJ/mol @ 101.3 kPa
MeSH Entry Terms
2-methylacrolein;methacrolein;methacrylaldehyde
Monoisotopic Mass
70.041865g/mol
Other Experimental
CONVERSION FACTORS: 1 MG/L= 349 PPM; 1 PPM= 2.8 MG/CU M;Liquid molar volume = 0.08320 cu m/kmol;Heat of Formation (gas) = -70.8 kJ/mol at 25 °C
Refractive Index
INDEX OF REFRACTION: 1.4144 @ 20 °C/D; MAX ABSORPTION (ALCOHOL): 216 NM (LOG E= 4.04); SADTLER REF NUMBER: 8350
UN Number
2396;2396;1143;2396;2396
Vapor Density
2.4 (AIR= 1);Relative vapor density (air = 1): 2.41;Relative vapor density (air = 1): 2.42
Vapor Pressure
154.99 mmHg;155 mm Hg @ 25 °C;Vapor pressure, kPa at 20 °C: 4.0;Vapor pressure, kPa at 20 °C: 16
Viscosity
0.49 mPa.s @ 20 °C;0.59 mm2/s at 20 °C