"A single substance (Substance)" means an element or compound that exists in a natural state in
or is caused by the manufacturing process. This includes additives that are necessary to maintain the stability of a single substance,
.Or adulterated substances that occur in the manufacturing process, but does not include the substance solvent that can be extracted from a single substance
without affecting the stability of a single substance or not cause changes to the composition of a single substance,
.
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