Agent Name

Paraffin waxes and hydrocarbon waxes, microcrystallized

CAS Number


Major Category

Other Classes


Microcrystalline wax; Petroleum wax, microcrystalline; Microcrystalline paraffin waxes and hydrocarbon waxes; Paraffin waxes and Hydrocarbon waxes, microcryst.; [ChemIDplus] 495D; Bright-Stock Paraffin; Cire brute; Hoechst-Wachs KLE; Hoechst-Wachs KSE; Hoechst-Wachs RT; Hydorcarbon waxes, microcryst.; Hydrocarbons >C35; Micro Wax, Microcrystalline Wax, Petroleum Wax; Mikrowax SM; Paraffin waxes; PFB (Refined paraffin wax from bright stock oil); PRB (Refined paraffin wax from bright stock oil); Wax, refined wax; [IUCLID]


Petroleum Refining Residues


Solid or semi-solid; [Reference #1] White to light yellow odorless solid; [Koster Keunen MSDS]


Permitted for use as an inert ingredient in non-food pesticide products; [EPA] Used in the chemical, fuel, leather processing, paper-pulp-board, polymer, textile processing, wood working, cosmetics, candle making, and detergents industries; Used as an anti-set-off and anti-adhesive agent, construction materials additive, corrosion inhibitor, intermediate, lubricant and additive, softener, viscosity adjustor, cleaning/washing agent, disinfectant, insulating agent, and impregnating agent; [IUCLID] Microcrystalline waxes from petroleum are used as chewing gum bases, protective coatings, defoaming agents, and surface finishing agents; [JECFA]


TSCA Definition 2008: Obtained from residual oils by solvent crystallization and consisting of mainly saturated straight and branched chain hydrocarbons with carbon numbers greater than C35; [ChemIDplus] No skin irritation observed in 21-day study of 8 human volunteers; Similar compounds cause liver changes (increased weight and histopathology) in 90-day oral study of rats at 1,850 mg/kg/day; [IUCLID] No potential for skin or eye irritation; Non-toxic by ingestion; [Koster Keunen MSDS]

Reference Link

EPA Hazard Characterization Document: Waxes and Related Materials - 2011

Adverse Effects

Hepatotoxin, Secondary

Links to Other NLM Databases
Toxicity Information


Chemical Information

Search ChemIDplus

Related Information in HazMap

Industrial Processes with risk of exposure: