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Polynoxylin skeletal.svg
Systematic (IUPAC) name
Methylene-N,N'-bis(hydroxymethyl)urea polymer
Clinical data
Legal status
Routes Topical
CAS number 9011-05-6 YesY
ATC code A01AB05 D01AE05
Chemical data
Formula (C4H8N2O3)n
 YesY (what is this?)  (verify)

Polynoxylin (trade name Anaflex) is an antiseptic for local treatment of the skin and the mouth. It is a polymer of urea and formaldehyde. The latter is the active principle after being released from the polymer.[1]


  1. ^ Kingston, D. (1965). "Release of formaldehyde from polynoxylin and noxythiolin". Journal of clinical pathology 18 (5): 666–667. doi:10.1136/jcp.18.5.666. PMC 473043. PMID 5835451.  edit