Foeniculum vulgare Mill. · Family: Apiaceae · Seed Oleoresin
Fennel's sweetness comes from trans-anethole, and its regulatory attention comes from estragole — a naturally occurring constituent that safety reviewers ask about and that varies substantially between fennel varieties. We declare both by GC on every batch, and state the variety.
Sweetness from one compound, scrutiny from another
Fennel oleoresin is the solvent-extracted concentrate of Foeniculum vulgare seed, used across confectionery, bakery, liqueurs, savoury seasoning and digestive preparations. India is among the world's largest fennel producers, with Gujarat and Rajasthan the principal growing regions.
Its sweet, anise-like character comes overwhelmingly from trans-anethole, supported by fenchone, which contributes a camphoraceous bitterness. The balance between them is what distinguishes sweet fennel from the bitter varieties: sweet fennel is anethole-dominated with lower fenchone, bitter fennel carries considerably more fenchone and reads sharper.
The constituent that attracts regulatory attention, however, is estragole — a naturally occurring alkenylbenzene present in fennel alongside anethole. Estragole has been the subject of safety evaluation in Europe, and its content varies with variety, growing conditions and plant part. Fennel remains a widely used and permitted food ingredient; the practical point is that a safety reviewer assessing a fennel-containing product will ask for the estragole figure, particularly for products aimed at frequent consumption or at infants and young children.
We declare anethole and estragole by GC on every batch, report volatile oil, and state the variety — because the estragole and fenchone questions both track it.
What defines the profile
The dominant constituent and the source of fennel's characteristic sweet, anise-like character. The principal marker for the material.
Camphoraceous and bitter. Low in sweet fennel, considerably higher in bitter varieties — the constituent that most distinguishes the two.
The safety parameter. A naturally occurring alkenylbenzene subject to evaluation in Europe. Content varies by variety and growing conditions, so it is declared per batch rather than assumed.
Contributing fresh citrus top notes to the overall profile.
A supporting monoterpene contributing to the characteristic aroma.
Collectively the aroma, declared per batch as on any aroma-led seed spice.
Why formulators specify an estragole-declared fennel oleoresin
The figure a safety reviewer will ask for, on the certificate rather than requested later as a special test.
The compound behind fennel's sweetness, assayed rather than assumed from an extraction ratio.
Sweet or bitter fennel declared — the varieties differ in fenchone and in estragole, so the distinction is substantive.
Reported per batch, since aroma is the commercial value on a seed spice with no pungent principle.
Solvent named and tested every batch — the defining control on any solvent-extracted product.
Gujarat and Rajasthan are among the world's principal fennel growing regions.
These are functional and physico-chemical properties of the actives; SV Botanica does not make medical or therapeutic claims for this ingredient.
Volatile oil grades and dispersible forms
| Grade | Standardisation | Form | Best For | Solubility |
|---|---|---|---|---|
| Fennel Oleoresin (Standard) Standard | Volatile oil declared; anethole and estragole by GC | Pale amber to brown viscous liquid | Confectionery, bakery, seasoning | Oil-soluble |
| Fennel Oleoresin (High Volatile) Aroma-led | Elevated volatile oil; full GC profile | Pale amber viscous liquid | Flavour-critical applications, low inclusion | Oil-soluble |
| Fennel Oleoresin Dispersible Dispersible | Plated or emulsified; profile declared | Free-flowing powder | Dry blends, digestive preparations | Dispersible |
| Fennel Essential Oil Quoted separately | Distilled volatile fraction only | Colourless to pale yellow mobile liquid | Flavour, liqueur, fragrance | Oil-soluble |
| Fennel Seeds (Whole / Ground) Quoted separately | Whole spice — not an extract | Green-brown seed or powder | Mukhwas, traditional and visible-spice use | — |
Estragole is declared on every grade, because the figure is needed for a finished-product safety assessment regardless of which grade is purchased, and obtaining it later as a one-off test delays reviews. The variety is stated too: sweet fennel is anethole-dominated with low fenchone, while bitter fennel carries considerably more fenchone and reads sharper — and the two also differ in estragole. Where a grade is standardised with a carrier, the carrier and inclusion level are named.
Full product specification for Fennel Oleoresin, standard grade. Values are specification limits, not batch results; a batch-specific CoA is issued per shipment.
| Parameter | Specification / Limit | Method |
|---|---|---|
| Botanical Source | Foeniculum vulgare Mill. | — |
| Plant Family | Apiaceae | — |
| Part Used | Dried seed (fruit) | — |
| Country of Origin | India | — |
| Appearance | Viscous liquid | Organoleptic |
| Colour | Pale amber to brown* | Organoleptic |
| Odour & Taste | Characteristic of fennel, sweet and anise-like | Organoleptic |
| trans-Anethole | Declared per batch | By GC |
| Estragole | Declared per batch | By GC / GC-MS |
| Fenchone | Reported per batch | By GC |
| Volatile Oil (% v/w) | Declared per batch | Distillation |
| Variety | Sweet fennel — stated per batch | Declaration |
| Solubility | Oil-soluble; dispersible grade available | — |
| Carrier / Diluent | Declared with inclusion level (standardised grades) | Declaration |
| Moisture (% w/w) | NMT 1.0 | Karl Fischer |
| Residual Solvent | Solvent named; within permitted limits — every batch | By GC |
| Lead (ppm) | NMT 1.0 | ICP-MS |
| Arsenic (ppm) | NMT 1.0 | ICP-MS |
| Cadmium (ppm) | NMT 0.3 | ICP-MS |
| Mercury (ppm) | NMT 0.1 | ICP-MS |
| Pesticide Residues | Complies (EU MRL, on request) | GC-MS / LC-MS/MS |
| Ethylene Oxide (ETO) | Not treated — declaration provided | LC-MS/MS (on request) |
| Aflatoxins B1 / Total (ppb) | NMT 2 / NMT 4 | HPLC-FLD |
| Ochratoxin A (ppb) | NMT 10 | HPLC-FLD |
| Total Plate Count (cfu/g) | NMT 10,000 | USP <2021> |
| Yeast & Moulds (cfu/g) | NMT 100 | USP <2021> |
| Escherichia coli | Absent | USP <2022> |
| Salmonella sp. | Absent | USP <2022> |
| HS Code | 3301.90 | — |
| Kosher / Halal | Certified (on request) | Certification |
| Shelf Life | 24 months from date of manufacture, in original packed condition | — |
| Storage | Cool, dark place below 25°C, tightly closed, protected from light | — |
*Colour varies with grade and concentration. The estragole line is what distinguishes this certificate from most fennel documentation. Estragole is a naturally occurring alkenylbenzene present in fennel alongside anethole, and it has been the subject of safety evaluation in Europe. Fennel remains a widely used and permitted food ingredient — nothing here suggests otherwise — but a safety assessor reviewing a fennel-containing product will want the figure, particularly for products intended for frequent consumption or for infants and young children, and a certificate omitting it turns a routine review into a delay. Content varies with variety, growing conditions and plant part, which is why we declare it per batch rather than quoting a typical value, and why the variety is stated. Note also that sweet and bitter fennel differ in fenchone: sweet is anethole-dominated and rounder, bitter carries more fenchone and reads sharper. Residual solvent is named and tested by GC every batch.
From seed to declared oleoresin — profiled, estragole-tested, documented
Raw Material: Produced from Foeniculum vulgare seed sourced from Indian growing regions, principally Gujarat and Rajasthan. Variety is recorded at intake and stated on the certificate, since it drives both the fenchone balance and the estragole content of the finished extract.
Extraction & Testing: Produced at certified facilities in India. Each batch is assayed for trans-anethole and estragole by GC, with fenchone reported and volatile oil by distillation. Residual solvent is tested by GC against the named solvent. Contaminant testing covers moisture, heavy metals by ICP-MS, aflatoxins and ochratoxin A, pesticide residue screening and a full microbiological panel.
Documentation: Every shipment ships against a batch-specific Certificate of Analysis stating the marker assay, volatile oil where applicable, the solvent used and its residual level, and carrier with inclusion level where applicable, together with an MSDS. Halal, Kosher and Organic certification are available — see our guides on EU pesticide MRL compliance and EU import requirements.
What backs every batch of Fennel Oleoresin oleoresin
Key information for global product registration and labelling
Fennel contains estragole, a naturally occurring alkenylbenzene, alongside its dominant anethole. Estragole has been the subject of safety evaluation in Europe, and while fennel remains a widely used and permitted food ingredient with a very long history of consumption, the constituent attracts attention in formal safety assessment. The practical consequence for a buyer is procedural rather than prohibitive: a safety assessor reviewing a fennel-containing product will want the estragole figure — particularly for products intended for frequent consumption, and most of all for anything aimed at infants and young children, where fennel preparations have historically been used and have accordingly received closer scrutiny. Content varies with variety, growing conditions and plant part, so a typical value is not a substitute for a batch figure. We declare estragole by GC on every batch as standard. Determinations about your finished product, its intended consumer group and its inclusion level remain with your regulatory and safety reviewer.
Every oleoresin is a solvent-extracted product, which makes residual solvent its defining quality control rather than an afterthought. Permitted extraction solvents and their maximum residues are set by the destination market's rules and differ by solvent class. We name the solvent used on every certificate and test each batch by GC. Buyers should confirm the solvent is permitted for their market and application — a supplier who will not name it has made that check impossible. Where a specific solvent system is required, it can be specified at order.
Supplied from India by SV Botanica — FSSAI Central Licence holder, Spices Board and APEDA registered exporter. Raw material is sourced principally from Gujarat and Rajasthan, with variety stated per batch. Shipped against a batch-specific Certificate of Analysis with export documentation available on request. This product is supplied as a food ingredient and is not intended to diagnose, treat, cure or prevent any disease.
Guides on fennel sourcing, standardisation and authenticity
How fennel's defining compound is assayed and what the figure means.
Buyer's GuideVarieties, grades and what to require on the certificate.
QualitySubstitution routes on fennel and the controls that catch them.
SourcingGujarat and Rajasthan growing regions and raw-material quality drivers.
RegulatoryResidue limits and screening for India-origin ingredients.
RegulatoryDocumentation, controls and border expectations for Indian botanicals.
Other seed spices and oleoresins from our range
Technical and commercial questions answered by our ingredients team
Sweet fennel oleoresin with anethole and estragole by GC, fenchone reported and volatile oil declared per batch. Samples for qualified buyers.
Supplied as a bulk ingredient for further manufacture. Buyers are responsible for compliance with the regulations of their destination market. This product is not intended to diagnose, treat, cure or prevent any disease.
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