How consistent is the quality between batches of patchouli oil?
Batch-to-batch consistency is managed through a fixed release specification, strict raw-material control and GC-MS fingerprint comparison for every batch. Patchouli oil varies naturally with origin, harvest and fermentation, so the target is a narrow, documented window rather than absolute identity.
Consistency System
| Control point | What we do |
|---|---|
| Raw material | Fixed supply agreements by origin (Indonesia 85-90% of world supply; China Guangdong Zhanjiang / Hainan / Guangxi); dried fermented leaf standard defined |
| Process | Standardised steam distillation, fermentation (2-8 days) and aging window |
| Release spec | Density 0.955-0.985, RI 1.505-1.515, rotation −35° to −60°, patchoulol within the agreed window (26-35% by grade) |
| Verification | GC-MS fingerprint compared with the ISO 3757 reference chromatogram per batch |
What Varies Naturally
- Patchoulol content across the 26-35% band (higher for Indonesian benchmark lots)
- The relative level of α-bulnesene and α-guaiene, which shifts the green/woody balance slightly
- Intensity of colour (amber to dark brown-red) — cosmetic grades such as the iron-free light grade are selected for pale colour
What We Guarantee
- Every batch is released against the same physical-chemical window and passes the 90% ethanol 1:10 solubility test
- COA is provided per batch with measured values, so you can compare lots directly
- For sensitive formulas, we can blend or hold lots to tighten the patchoulol window on request
- Trending data across your purchase history is available to help you forecast aroma drift
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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.
