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Substance Name: Silver, crusts
RN: 69029-57-8


  • TSCA Definition 2018: Product formed when zinc is mixed into de-copperized lead where it combines with silver and is skimmed off in blocks. Lead is removed from the blocks by applying hydraulic pressure. Consists primarily of copper, gold, lead, silver and zinc.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

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Names and Synonyms


  • EINECS 273-799-9
  • Lead refinery zinc blocks

Systematic Name

  • Silver, crusts

Registry Numbers

CAS Registry Number

  • 69029-57-8

System Generated Number

  • 0069029578