How is this osmanthus absolute extracted, and are any synthetic solvents left in the final product?
This osmanthus absolute is produced by classic solvent extraction of fresh flowers, followed by multiple desolventizing and dewaxing steps that leave no synthetic residues above specification limits.
Extraction Flow
- Harvest — fresh flowers picked at full bloom, same-day delivery
- Dehydration — saltwater soaking (25%–30% NaCl, ≥24 h) to remove excess moisture
- Extraction — rotary-drum extraction with food-grade solvent (petroleum ether), about 90 minutes per batch with two wash cycles
- Solvent recovery — atmospheric distillation followed by vacuum distillation at low temperature to reclaim the solvent
- Dewaxing & refining — ethanol washing to separate waxes, then vacuum concentration to yield the pure absolute
Key Facts
- Traditional extraction yield: 1.1%–1.7% of flower weight; advanced supercritical CO2 processes reach 0.36%–0.40% with no solvent residue
- Solvent residue in the finished absolute is monitored and kept within GB 1886.265-2016 and food-additive limits
- Alternative green technologies (supercritical CO2, enzyme-assisted, irradiation-assisted) are available for certified solvent-free requirements
Each batch ships with a GC-MS report confirming composition and residual-solvent compliance.
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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.
