FACTOID # 60: Japan's water has a very high dissolved oxygen concentration - but not enough to prevent drowning in the bath.
 
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Encyclopedia > Butyraldehyde

Butanal (C4H8O; alternate names include butyraldehyde, butyl aldehyde, butal, and butanaldehyde) is the aldehyde analog of butane. It is a colorless liquid, with an acrid smell. General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... General Name, Symbol, Number oxygen, O, 8 Chemical series nonmetals Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... An aldehyde is either a functional group consisting of a terminal carbonyl group, or a compound containing a terminal carbonyl group. ... Butane, also called n-butane, is the unbranched alkane with four carbon atoms, CH3CH2CH2CH3. ...


It can be produced by oxidation of 1-butanol, or via the hydroformylation of propane. The most fundamental reactions in chemistry are the redox processes. ... Butanol is a higher alcohol with a 4 carbon atom structure and a general formula of C4H10O. There are 4 different isomeric structures for butanol: butan-1-ol CH3-CH2-CH2-CH2-OH (also n-butanol) butan-2-ol CH3-CH2-CH(OH)-CH3 (also sec-butanol) isobutyl alcohol CH3... Hydroformylation is the one-step transformation of an olefin to an aldehyde that has one more carbon atom. ... Flash point -104 °C Autoignition temperature 432 °C R/S statement R: 12 S: 9, 16, 33 RTECS number TX2275000 Supplementary data page Structure and properties n, εr, etc. ...


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The laboratory studies showed that butyraldehyde becomes a more significant component of the headspace as the solutions aged and could indicate a higher potential for exposure to this aldehyde when handling waste developer solutions." (Scobbie et al, 1996, p 433).).
It is likely that hand-mixing of chemicals, as was frequent in the past, could give rise to relatively high concentrations of these substances during the short time required for dispensing and dilution with water.
The spent developer appears to be enriched in butyraldehyde but not enough is known about the health effects of this material to be able to judge its effect." (p 434).
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