propionaldehyde


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propionaldehyde

[¦prō·pē‚än′al·də‚hīd]
(organic chemistry)
C2H5CHO Flammable, water-soluble, water-white liquid, with suffocating aroma; boils at 48.8°C; used to manufacture acetals, plastics, and rubber chemicals, and as a disinfectant and preservative.
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Health-related information of tested VOCs and generated by-products Pollutnat REL (ppm) REL data source IARC carcinogenic classification 2-Propanol 400 NIOSH Group 3, not classifiable as to its carcinogenicity to humans 1-Butanol 50 NIOSH REL for - isobutanol n-Hexane 50 NIOSH - Octane 75 NIOSH - Toluene 100 NIOSH Group 3, not classifiable as to its carcinogenicity to humans O-xylene 100 NIOSH Group 3, not classifiable as to its carcinogenicity to humans MEK 200 NIOSH - Formaldehyde 0.016 NIOSH Group 1, carcinogenic to humans Acetaldehyde 0.078 OEHHA (*) Group 2B, possibly carcinogenic to humans Acetone 250 NIOSH - Propionaldehyde - Not established - (*) Office of Environmental Health Hazards Assessments, California Environmental Protection Agency, U.S.
For the other aldehydes, HPLC revealed propionaldehyde and valeraldehyde were lower than wood, with hexaldehyde at a relatively similar content as wood only, with all significantly lower with lignin use than found using either protein source.
Peaks at m/z 57, 59, 71, and 73 were observed in Figure 2(a), which were corresponding to the [[MH].sup.+] of acrolein, propionaldehyde, crotonaldehyde, and butyraldehyde, respectively.
A mixture of 8 g of St-l%DVB copolymer (S) functionalized with amino groups (2 mmol amino groups/g polymer), phenylphosphinic acid, benzaldehyde (S2) [or propionaldehyde (S4)] in 50 ml tetrahydrofuran was maintained under stirring for 24 h at 55[degrees]C.
10[micro]l of mPEG- propionaldehyde conjugated D-amino acid oxidase had been injected into HPLC column to know the change in retention time using same conditions as above.
Different hardening agents were used, formaldehyde being the most effective in terms of low-water absorption, followed by furfural and propionaldehyde. (6) It was also determined that hardening the soy meal at the isoelectric point of soy protein (pH 4.2-4.5) reduced the water absorption of the final parts.
While planting, 6.7 kg [ha.sup.-1] aldicarb [2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl)oxime] was applied in furrow for insect control.
Contents include: Alpha-hexylcinnamaldehyde, geraniol, propionaldehyde 2-(4-butylphenyl) 4-(4-hydroxy-4- methylpentyl) cyclohex-3-enecarb- aldehyde.
Products: Solvents and intermediates including: butanol, n-buty-ralde-hyde, 2-ethylhexanol, isobutanol, propanol, propionaldehyde, butyl acetate, isobutyl acetate, propyl acetate, isopropyl acetate, 2-ethylhexoic acid, propionic acid, isopropanol, MIBK, MIBC, DIBK
Like fenamiphos, aldicarb (2-methyl-2-(methythio) propionaldehyde, O-(methylcarbamoyl)oxime) degrades into aldicarb sulfoxide and aldicarb sulfone.
The major degradation products of MTBE by conventional ozonation and the advanced oxidation process (ozone/hydrogen peroxide) under drinking water treatment conditions are TBF, TBA, 2-methoxy-2-methyl propionaldehyde, acetone, methyl acetate, hydroxy butyraldehyde, and formaldehyde.