Distillates (petroleum), hydrotreated heavy paraffinic

A REACH-registered heavy petroleum distillate fraction (CAS 64742-54-7) used as a base carrier in lubricant formulations, fuel additives, and industrial oil products. Distinguished from the lighter paraffinic fraction (CAS 64742-55-8) by higher molecular weight, higher flash point (typically >200°C), and higher kinematic viscosity. Severely hydroprocessed to reduce aromatic content below the EU exemption threshold (less than 3% DMSO extract per IP 346), which removes the Carc. 1B classification that applies to unrefined mineral oil fractions.

The dominant hazard at the ingredient level is H304 (aspiration toxicity Cat 1) — a swallowing hazard, not an inhalation risk from normal handling. At the high viscosity typical of this fraction (≥18 mm²/s kinematic), the aspiration risk from swallowing is substantially lower than for low-viscosity petroleum fractions; however, the H304 classification is retained conservatively. The substance has no volatile contribution at ambient temperatures due to the very high flash point.