Polyaminopropyl biguanide

This article is about polymer containing propyl linker between guanidine groups. For PHMB the antimicrobial polymer incorectly named Polyaminopropyl biguanide, see Polyhexanide.

Polyaminopropyl biguanide (PAPB) is a polymer containing biguanide group connected with a three methylene (propyl) linker. The polymer is a propyl analogue of polyhexamethylene biguanide. The polymer display some antibacterial activity however much lower than PHMB. ^[1] As of May 2024, PAPB is not approved as a biocidal active substance under EU regulations. ^[2]

Polyaminopropyl biguanide

Names
Other names Polyamine-propyl-biguanidine
Identifiers
CAS Number	133029-32-0 Y
Abbreviations	PAPB
ChemSpider	none
ECHA InfoCard	100.118.649
UNII	DT9D8Z79ET Y
Properties
Chemical formula	(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

Name controversy

In some sources, particularly in lists of cosmetic ingredients (INCI), the name polyaminopropyl biguanide is wrongly associated with polyhexamethylene biguanide (PHMB) ^{[3] [4]}