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How do you ensure batch-to-batch consistency of this Nardostachys spikenard oil?

Every batch is released against a strict internal specification: GC-MS fingerprint matching (valeranone and spathulenol within the agreed range; key markers calarene/nardosinone/α-cedrene reported), physical constants (density, RI, rotation) within limits, and sensory check by our perfumer panel. Multi-source lots are blended (pooled) before release to smooth natural variation; batch COA shows ±15% tolerance on markers unless a tighter contract specification is agreed.

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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.