Graphene

Graphene (CAS 7782-42-5) is a single-atom-thick layer of carbon atoms arranged in a hexagonal lattice. In consumer car care products marketed as "graphene coatings," it typically appears at trace concentrations (under 1% by weight), suspended in a solvent carrier (cyclosiloxane, IPA, or petroleum distillate base). **Performance claims vs. evidence:** Manufacturers claim graphene at trace concentrations enhances thermal conductivity (reducing water-spot formation), improves anti-static properties, and increases hardness. Independent community testing on the anti-static and water-spot claims is mixed at the spray-format tier. Whether <1% graphene delivers measurable advantages over a comparable siloxane/SiO₂ formulation without graphene has not been confirmed by controlled independent testing. **Health — inhalation note:** NIOSH has identified inhalation of dry graphene nanoplatelets as a potential respiratory concern. Consumer coatings use graphene in liquid suspension — not dry powder. Wipe-on application does not produce respirable nanoparticle concentrations. The inhalation concern applies to occupational handling of dry graphene powders, not consumer spray-coating application. **Distinguish from graphene oxide (CAS 1034343-98-0):** Graphene oxide is a chemically functionalized derivative with oxygen groups added to the graphene lattice. Many products labeled "graphene" actually contain graphene oxide — check the SDS §3 CAS number. CAS 7782-42-5 is raw graphene; CAS 1034343-98-0 is graphene oxide.