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Substance Name: Surfilcon A [USAN]
RN: 38809-73-3


  • Hydrophobic polymethylmethacrylate complexed with hydrophilic poly-N-2-vinylpyrrolidone for hydrogel intrastromal implants.

Classification Code

  • Contact Lens Material (Hydrophilic)

Molecular Formula

  • (C6-H9-N-O.C5-H8-O2.C7-H10-O2)x-

Molecular Weight

  • 337.413
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Names and Synonyms

Name of Substance

  • Duragel 75
  • Surfilcon A [USAN]


  • 1-Vinyl-2-pyrrolidinone polymer with methyl methacrylate and allyl methacrylate
  • Permaflex
  • Permaflex Naturals
  • Surfilcon
  • Surfilcon A
  • Xylofilcon A

Systematic Names

  • 2-Propenoic acid, 2-methyl-, endo-
  • 2-Pyrrolidinone, 1-ethenyl-, polymer with methyl 2-methyl-2-propenoate and 2-propenyl 2-methyl-2-propenoate

Registry Numbers

CAS Registry Number

  • 38809-73-3

Other Registry Number

  • 134688-38-3

System Generated Number

  • 0038809733

Molecular Formulas

Molecular Formula

  • (C6-H9-N-O.C5-H8-O2.C7-H10-O2)x-

Molecular Formula Fragments

  • C5-H8-O2
  • C6-H9-N-O
  • C7-H10-O2

Structure Descriptors