Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
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309/00
Sulfonic acids; Halides, esters, or anhydrides thereof
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C07C309/28
having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
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C07C309/41
containing singly-bound oxygen atoms bound to the carbon skeleton
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C07C309/42
having the sulfo groups bound to carbon atoms of non-condensed six-membered aromatic rings
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