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TERBIUM CHLORIDE

CAS 10042-88-3,13798-24-8
35

Safety score · 0–100

Caution

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A rare-earth lanthanide salt without an established cosmetic function or safety review. Better avoided in leave-on products.

Terbium Chloride (TbCl3, CAS 10042-88-3 anhydrous; the hexahydrate is CAS 13798-24-8) is a white-to-pale lanthanide salt used in phosphors, lasers, and as a laboratory reagent. There is no CIR or SCCS opinion supporting cosmetic use, no FDA monograph, and no recognised cosmetic function in the standard literature. Laboratory safety sheets classify lanthanide chlorides as skin and eye irritants (GHS Cat. 2) and harmful if swallowed. Lanthanides are persistent in aquatic environments and a recognised emerging environmental contaminant class. Cosmetic use as a "rare-earth conditioner" is supplier-driven and unsupported by independent safety or efficacy data. Default position is to avoid in leave-on products.

Function

SKIN PROTECTING

Skin benefits

  • No demonstrated cosmetic benefit

Known concerns

  • Lanthanide salt with no cosmetic safety review
  • Skin/eye irritant in lab data
  • Environmental persistence
  • No CIR/SCCS opinion

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.