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Substance Name: Hydrocarbons, C4-5, butene concentrator by-product, sour
RN: 68647-62-1


  • TSCA Definition 2018: A complex combination of hydrocarbons produced during butylene production. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C4 through C5.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

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Names and Synonyms


  • EINECS 271-962-9
  • n-Butylene, by-product
  • Pentane stream-sour, by-product

Systematic Name

  • Hydrocarbons, C4-5, butene concentrator by-product, sour

Registry Numbers

CAS Registry Number

  • 68647-62-1

System Generated Number

  • 0068647621