AldehydeAdduct formation in the
presence of alcohols
•
Aldehydeswill formadducts in the presence of alcohols.
An example is benzaldehyde
in the presence ofmethanol.
This reactionmay take place immediatelyor slowlyover
severalmonths.
•
Most brands and grades ofmethylene chloride containmethanol added at a
concentration of about 500ppm as a stabilizer.
Thismayormaynot be listed on the
bottle label.
Methylene chloride canbe quickly screened for addedmethanol by
GC/FIDon a non-polar column, such as theRtx-5.
•
Themethylene chloride used for this studywas amylene stabilized and containedno
methanol.
This reactionmaybe catalyzed byeither acidor base
