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Colorant / Pigment

ZINC SULFIDE

CAS 1314-98-3
55

Safety score · 0–100

Moderate

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

About

A largely insoluble zinc sulfide — used historically as a pigment/phosphor. Not a valid depilatory; impurity profile matters.

Zinc Sulfide (ZnS, CAS 1314-98-3) is an insoluble inorganic sulfide that occurs naturally as the mineral sphalerite and is produced synthetically as a white pigment, optical material and phosphor (classic cathode-ray screens used doped ZnS). Unlike soluble sulfides (CaS, SrS), ZnS does not readily liberate H2S at neutral pH, so mechanistically it is not a functional depilatory despite occasional ingredient-list placement suggesting otherwise. Cosmetic-grade material would need to be controlled for heavy-metal impurities (cadmium, lead) common in mineral zinc sources. There is no dedicated CIR/SCCS cosmetic monograph, and it does not appear on major cosmetic pigment positive lists for general skin care. Its cosmetic use is niche and should be treated with caution pending grade verification.

Function

DEPILATORY

Skin benefits

  • Inert pigment performance in limited niche uses

Known concerns

  • Heavy-metal impurities possible
  • No dedicated CIR cosmetic monograph
  • Misclassified as depilatory — functionally inert in that role
  • Grade/provenance matters

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.