Effects of methacrolein
on the respiratory tract in mice.
(19) Volatile aldehydes (formaldehyde, acetaldehyde, acrolein propionaldehyde, and methacrolein
) are toxicants known to cause pulmonary disease.
The ratio increased because of the simultaneous increase in the concentrations of species produced by isoprene oxidation (i.e., methyl vinyl ketone and methacrolein) and decrease in isoprene itself (Fig.
Martin, 2013: Production of methyl vinyl ketone and methacrolein via the hydroperoxyl pathway of isoprene oxidation.
On the basis of that identification we found formaldehyde, acetic acid, pyridine-2-aldehyde, ozone, acetone, propionaldehyde, methacrolein
, butyraldehyde and benzaldehyde (samples MA-R-5 to MA-R-10).
Devillers, "Evaluation of the role played by bismuth molybdates in [Bi.sub.2][Sn.sub.7][O.sub.7]-Mo[O.sub.3] catalysts used for partial oxidation of isobutene to methacrolein
," Applied Catalysis A: General, vol.
The effect on human eye blink frequency of exposure to limonene oxidation products and methacrolein
. Toxicol Lett 156(2):241-251.
We also found traces of cancer-inducing chemicals benzene, toluene, xylene, methacrolein
, furfural and Pyridine, which is used in the manufacture of pesticides.
The exceptions are methyl vinyl ketone (MVK) and methacrolein
(MACR), which are largely generated from the oxidation of isoprene, although some plant species are known to emit these gases (Jardine et al.
Devillers, "Evaluation of the role played by bismuth molybdates in [Bi.sub.2][Sn.sub.2][O.sub.7][+ or -]Mo[O.sub.3] catalysts used for partial oxidation of isobutene to methacrolein
," Applied Catalysis A, vol.
Gas chromatography and mass spectrometry analyses indicate the initial and major photochemical products produced during these experiments for BD are acrolein, acetaldehyde, and formaldehyde, and products for ISO are methacrolein
, methyl vinyl ketone, and formaldehyde; both formed < 200 ppb of ozone.
Addition of the effects of the residual reactants and the identified stable irritant products (formaldehyde, formic acid, acetic acid, methacrolein
, and methylvinyl ketone) could explain only partially the observed sensory irritation.