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Substance Name: Portland cement
RN: 65997-15-1


  • TSCA Definition 2019: Portland cement is a mixture of chemical substances produced by burning or sintering at high temperatures (greater than ( raw materials which are predominantly calcium carbonate, aluminum oxide, silica, and iron oxide. The chemical substances which are manufactured are confined in a crystalline mass. This category includes all of the chemical substances specified below when they are intentionally manufactured in the production of Portland cement. The primary members of the category are Ca2SiO4 and Ca3SiO5. Other compounds listed below may also be included in combination with these primary substances.: CaAl2O4; CaAl4O7; CaAl12O1; Ca3Al2O6; Ca12Al14O33; CaO; Ca2Fe2O5; Ca2Al2SiO7; Ca4Al6SO16; Ca12Al14Cl2O32; Ca12Al14F2O32; Ca4Al2Fe2O10; Ca6A14Fe2O15

Molecular Formula

  • Unspecified

Classification Codes

Classification Code


Superlist Classification Codes

  • TWA (15 mg/m3 total dust; 5 mg/m3 respirable fraction)
  • TWA 10 mg/m3; (Inhalable particulate matter containing no asbestos and < 1% crystalline silica)
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Links to Resources

Names and Synonyms

Results Name

  • Portland cement


  • Cement kiln dust
  • EINECS 266-043-4
  • Kiln precipitator catch
  • Portland cement kiln dust
  • Portland cement plant kiln dust
  • Waste kiln dust

Systematic Names

  • Cement, portland, chemicals
  • Silicate, portland cement

Superlist Names

  • Cement, portland, chemicals
  • Portland cement
  • Portland cement [Silicates 9less than 1% crystalline silica)]

Registry Numbers

CAS Registry Number

  • 65997-15-1

System Generated Number

  • 0065997151