Naphtha (Petroleum), Hydrotreated Light

Hydrotreated light naphtha (CAS 64742-49-0) is a refined petroleum fraction in the C5–C8 carbon number range. The hydrotreatment process removes aromatic compounds (benzene, toluene) and unstable olefins, making it less carcinogenically hazardous than untreated naphtha while retaining the aliphatic solvent properties useful for dissolving oil mist and light hydrocarbon contamination.

In aerosol cleaning products, this fraction provides the core solvency for dissolving oil-mist contamination from MAF sensors, carburetor passages, and electrical contacts. Its low boiling range (approximately 60–140°C) means fast evaporation at ambient temperature — a critical property for sensor-cleaning applications where residue cannot be left on delicate elements.

The light naphtha fraction carries OSHA HazCom mixture-level classifications including H304 (aspiration Cat 1) at typical working concentrations, H336 (narcotic effects), and in high-concentration aerosol products H370 (STOT-SE Cat 1 affecting CNS and eyes). The CRC 05110 mixture-level H370 classification is driven by the 40–50% naphtha fraction. Aquatic toxicity H401/H411 (acute and chronic Cat 2) applies at mixture level in products where this ingredient comprises a significant fraction.