Polyaminopropyl biguanide

Polyaminopropyl biguanide (PAPB) is a disinfectant and a preservative used for disinfection on skin and in cleaning solutions for contact lenses. It is also an ingredient in many deodorant bodysprays. It is a polymer or oligomer where biguanide functional groups are connected by hexyl hydrocarbon chains, with varying chain lengths. PAPB is specifically bactericidal at very low concentrations (10 mg/l) and is also fungicidal.

Polyaminopropyl biguanide
Names
Other names
Polyamine-propyl-biguanidine
Identifiers
Abbreviations PAPB
ChemSpider
  • none
ECHA InfoCard 100.118.649
UNII
Properties
(C5H11N5)n
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Biocidal activity

It has a unique method of action: the polymer strands are incorporated into the bacterial cell membrane, which disrupts the membrane and reduces its permeability, which has a lethal effect to bacteria. It is also known to bind to bacterial DNA, alter its transcription, and cause lethal DNA damage.[1]

Disinfectant

PAPB solutions are sold for use as a general disinfectant solution to be applied onto skin. As it is not cytotoxic, it can be applied directly into wounds.[2] It is also not irritating like more traditional disinfectants such as alcohols (ethanol, isopropanol) and oxidizers (iodine).

Contact lens solution

A contact lens solution containing polyaminopropyl biguanide in combination with a borate buffer has been patented.[3] The solution is disinfecting and preservative and has a broad spectrum of bactericidal and fungicidal activity at low concentrations coupled with very low toxicity when used with soft-type contact lenses.[4]

See also

References
  1. Allen; White, GF; Morby, AP; et al. (2006). "The response of Escherichia coli to exposure to the biocide polyhexamethylene biguanide". Microbiology. 152 (4): 989–1000. doi:10.1099/mic.0.28643-0. PMID 16549663.
  2. Gerit D. Mulder, Joseph P. Cavorsi and Daniel K. Lee (2007). "Polyhexamethylene Biguanide (PHMB): An Addendum to Current Topical Antimicrobials". Wounds. 19 (7): 173–182. PMID 26110333.
  3. Ogunbiyi et al. US 4758595
  4. Josefa Velasco, Javier Bermudez (1996). "Comparative study of the microbial flora on contact lenses, in lens cases, and in maintenance liquids". Contact Lens and Anterior Eye. 23 (2): 55–58. doi:10.1016/0892-8967(96)00004-1.
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