What is pure chemistry?
Pure chemistry is a way to express that a certain process or
result was not achieved by any other means. For example distilling
is physical process. "Refining" could be a process chemical,
physical or both. Sometimes is the term "pure chemistry" used for
materials synthetically produced or engineered.
Ethylvaniline is produced only synthetically from lignine (from
wood) and the resulting flavour of pure ethylvaniline is to some
people irritating, because it lacks the various by-products and
impurities that the natural vanilla flavor contains. Such a person
could say about the ethylvaniline flavoring that it is "pure
chemistry", lacking the natural substance.
Some cheap carbonated bottled waters are best described with
this term because they only contain water, carbon dioxide,
aspartame, citric acid, coloring. Naturally occurring substances
never come in their pure form, but as a wide spectrum of chemical
compounds of various concentrations.