o-dichlorobenzene is not a paraffin. Paraffins are straight chains of carbon atoms. Chlorinated paraffins are straight carbon chains with chlorine atoms attached.
On the other hand, o-dichlorobenzene is a structure of chlorine atoms connected to benzene rings, which are hexagons formed of carbon atoms, usually with double bonds. In other words, o-DCB is a different chlorinated structure than chlorinated paraffins.
Here's a quote from a Google source about o-dichlorobenzene:
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What is o-DCB and how is it used?
Ortho-dichlorobenzene, (o-DCB) is a colorless organic liquid with a pleasant, aromatic odor. The greatest use of o-dichlorobenzene is as a chemical intermediate for making agricultural chemicals, primarily herbicides. Other present and past uses include: solvent for waxes, gums, resins, wood preservatives, paints; insecticide for termites and borers; in making dyes; as a coolant, deodorizer, degreaser.
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Since MMO can be used as an oil additive (as well as an additive for fuel), sometimes as an engine flushing agent, conceivably the o-dichlorobenzene is a solvent for cleaning up varnish - maybe?
Heck, maybe it's the source of MMO's unique aroma . . . since it has been used as a deodorizer . . . ?????
Bob A.