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Substance Name: Residues, butadiene recovery solvent regeneration
RN: 68333-21-1


  • TSCA Definition 2018: The complex residuum from the regeneration of solvents used to recover butadiene from other C4 hydrocarbons. It consists primarily of furfural polymers and furfural butadiene polymers. Calcium carboxylates, furfural and methoxypropionitrile may also be present.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

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Names and Synonyms


  • Butadiene solvent purification tars
  • EINECS 269-776-8

Systematic Name

  • Residues, butadiene recovery solvent regeneration

Registry Numbers

CAS Registry Number

  • 68333-21-1

System Generated Number

  • 0068333211