Natamycin is a naturally occurring polyene macrolide antifungal agent produced by Streptomyces natalensis, exhibiting potent in vitro and in vivo activity against a broad spectrum of yeasts and filamentous fungi. In vitro studies show strong inhibition of Candida spp., Aspergillus spp., and other food- and ocular-relevant fungi, with reported MIC values typically in the low µg/mL range (often ~1–10 µg/mL depending on species and strain).

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.