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Is the preservative-free hydrosol safe from microbial contamination?

Yes — every batch is microbiologically tested and released within strict limits, thanks to hygienic production, aseptic filling and sealed containers.

TestTypical Limit (cosmetic standard)
Total plate count≤ 100 CFU/mL
Yeast & mold≤ 100 CFU/mL
Pathogens (E. coli, S. aureus, P. aeruginosa, C. albicans)Absent / per 1 mL
Safety in use depends on the whole chain: the hydrosol leaves the factory with a controlled microbial load, and afterwards the buyer's storage and consumption habits determine how it performs. Keeping it cool, sealed and used within 3–6 months of opening maintains that safety margin.

For retail products with a long shelf life, we recommend formulating with a compliant preservative system at the finished-product stage — our OEM team can help. Request the latest microbiological COA for your batch.

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Guilin Four Seasons Sunshine

Founded in 2006, Guilin Four Seasons Sunshine F&F Co., Ltd. is a natural plant extract manufacturer and OEM/ODM partner in Guilin, China, combining proprietary Living-Fragrance physical extraction with supercritical fluid extraction to deliver pure, traceable botanical ingredients to global food, flavor, fragrance and personal care brands.