Skip Navigation
ChemIDplus A TOXNET DATABASE LiteBrowseAdvanced

Substance Name: Benzylpenicilloyl polylysine [USP]
RN: 31855-75-1
UNII: 76479814OY


  • Lactam ring opened so inactive as antibiotic; used as a skin-testing reagent to detect immunoglobulin E antibodies in people with a history of penicillin allergy.

Molecular Formula

  • C16-H18-N2-O4-S.(C6-H14-N2-O2)x

Molecular Weight

  • 480.5828

Classification Code

  • Diagnostic Aid (Penicillin Sensitivity)
* denotes mobile formatted website

Links to Resources

Names and Synonyms

Name of Substance

  • Benzylpenicilloyl polylysine
  • Benzylpenicilloyl polylysine [USP]


  • Benzyl penicilloyl-polylysine
  • Benzylpenicilloyl polylysine
  • Benzylpenicilloyl-G-polylysine
  • BPO-oligolysine
  • Pre-pen
  • UNII-76479814OY

Registry Numbers

CAS Registry Number

  • 31855-75-1


  • 76479814OY

System Generated Number

  • 0031855751