A natural plant extract manufacturer and OEM/ODM partner
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Is a Certificate of Analysis (COA) provided with every batch?

Yes. Every production batch ships with its own COA covering identity, physicochemical parameters, composition markers and purity results, signed by our QC department.

COA Content

SectionParameters Listed
IdentityBotanical name, part used, extraction method, batch number
PhysicochemicalRelative density, refractive index, acid value, appearance
CompositionKey markers (linalool, linalool oxide, α-terpineol, geraniol)
PurityGC-MS fingerprint, no solvent residue
Micro limitsMicrobiological results on request for cosmetic use
COAs are issued against the batch number printed on each drum or bottle, so you can trace every unit you receive back to a specific production lot and its testing record. Retain the COA for your own incoming-inspection file and for the documentation your market's authority may request.

Send us your COA template and we will match its fields to your QC format from the first order.

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This article was published on 2026-09-07, and last updated on 2026-09-07. The article will be continuously updated.

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Guilin Four Seasons Sunshine

sales@essentialoilsfactory.com
86 13367530509

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.

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