Virucidal activities of novel hand hygiene and surface disinfectant formulations containing EGCG-palmitates (EC16)

Douglas Dickinson, Bianca Marsh, Xueling Shao, Emma Liu, Lester Sampath, Bo Yao, Xiaocui Jiang, Stephen Hsu

Research output: Contribution to journalArticlepeer-review


Background: Non-toxic hand hygiene and surface disinfectant products with virucidal activity against alcohol-resistant nonenveloped norovirus are in urgent need. Method: Alcohol-based formulations were made with epigallocatechin-3-gallate-palmitate (EC16), an FDA accepted food additive. Based on in-house testing of formulations, 3 prototypes, PTV80 hand gel, PST70 surface disinfectant spray and PST70 surface disinfectant wipe, were selected from in-house tests for independent testing at GLP (good laboratory practice) laboratories according to EN 14476:2019 (hand gel), ASTM test method E1053-20 (spray), and ASTM E2362-15, E1053, and ASTM E2896-12 (wipe). Results: The PTV80 hand gel prototype demonstrated a >99.999% reduction of murine norovirus S99 infectivity in 60 seconds. Carrier testing of the PST70 surface spray and surface wipe demonstrated reduction of feline calicivirus infectivity by >99.99% in 60 seconds. In addition, testing with human coronavirus and human herpes simplex virus demonstrated >99.99% efficacy in 60 seconds, consistent with broad spectrum virucidal activity. Conclusions: The novel non-toxic prototypes containing EC16 were found to be suitable for use in future hand sanitizer gel, surface disinfectant spray and wipe products against norovirus. Products based on these formulations could be used safely to help prevent and control norovirus and other emerging virus outbreaks, pending future studies.

Original languageEnglish (US)
Pages (from-to)1212-1219
Number of pages8
JournalAmerican Journal of Infection Control
Issue number11
StatePublished - Nov 2022


  • Alcohol-resistant microorganisms
  • Green tea polyphenols
  • Non-toxic formulations
  • Norovirus
  • Novel antiseptics

ASJC Scopus subject areas

  • Epidemiology
  • Health Policy
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases


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