Solvent Naphtha (Petroleum), Heavy Aliphatic

What it is

Solvent naphtha (petroleum), heavy aliphatic (CAS 64742-96-7) is a complex mixture of C9–C12 aliphatic hydrocarbons produced by petroleum refining. It's a carrier solvent: whatever active ingredients a formula depends on (ceramic-coating silane/siloxane resins, correcting-compound abrasive/polymer systems, or the lubricant additive package in a penetrating oil) are dissolved in this naphtha for application, and the naphtha itself evaporates or is displaced afterward rather than remaining part of the finished result.

Where it appears in car care

This heavy aliphatic cut shows up across several distinct product families with different chemistry goals — ceramic and quartz coatings use it to carry silane/siloxane actives during cure, paint-correction compounds use it as a light carrier alongside abrasives and polymers, and penetrating oils use it as a secondary carrier solvent alongside lubricating and corrosion-inhibiting additives. The naphtha's role is the same low-level "vehicle" job in each: get the active chemistry onto the surface, then get out of the way.

Hazard profile

The heavy aliphatic grade has a higher flash point than light naphtha fractions and a lower evaporation rate. H304 (aspiration hazard Cat 1) is the primary GHS classification concern at ingredient level — relevant only if the product is swallowed. This hazard classification does not imply a significant vapor-inhalation risk during normal application at room temperature.