Extraction words describe a route, not a ranking
Essential oil, absolute and resinoid are useful words, but they do not arrange natural perfumery materials into a ladder from weak to strong or ordinary to superior. They help describe how a material was obtained. The exact plant, plant part, process and supplied preparation still matter.
This distinction makes shopping and formula reading easier. Two products connected to the same plant can be different inputs, while two similar-looking extracts can come from different source materials. Start with the full identity rather than choosing from the extraction word alone.
ISO 9235 is the vocabulary standard for aromatic natural raw materials. Its public page establishes that scope; the complete paid standard was not used as a substitute for product documentation here. The explanations below use manufacturer process descriptions and are a practical introduction, not instructions for extracting materials at home.
What does essential oil mean in this context?
Distillation is an important route to essential oils: a material is processed with water or steam, and the oil phase is separated from the aqueous phase. Citrus essential oils can also be obtained by mechanical expression of the peel. dsm-firmenich describes both distillation and cold expression among its extraction technologies.
The name does not establish a single-molecule composition, an exact aroma or a universal solvent response. Read the botanical identification and plant part, and retain the supplier’s stated process or grade. “Oil” in an essential-oil name should not be treated as interchangeable with a separately named fixed carrier oil in a formula record.
A recipe or notebook entry that simply says “plant extract” is not precise enough to decide which product was intended. Retain the extraction term as part of the name, then use the product record to resolve the remaining details before comparing quantities.
How do absolutes and resinoids differ?
Solvent extraction is another route. In its process terminology, IFF describes a resinoid as an extract from dry plant-origin raw material using a solvent. The starting material and the extraction route are part of the identity; thickness or colour alone cannot identify it.
An absolute is associated with a further alcoholic extraction or purification of an earlier extract. Firmenich’s manufacturer process glossary describes this relationship to a concrete or resinoid. That is a process distinction, rather than a claim that every absolute is stronger, purer in every sense, or a complete reproduction of the living plant’s scent.
A concrete is a distinct intermediate in some solvent-extraction routes. Do not silently substitute the word absolute for it when transcribing a formula. Likewise, “resin” can name a source material, while “resinoid” names an extract. Similar vocabulary does not make the contents of two bottles equivalent.
Scroll sideways to see every column when needed.
| Term | Useful process context | Still needs to be identified |
|---|---|---|
| Essential oil | Distillation routes; expression for citrus oils. | Botanical source, plant part, process and grade. |
| Absolute | Alcoholic extraction/purification of an earlier extract. | Starting extract, exact product and supplied preparation. |
| Resinoid | Solvent extract associated with dry plant material. | Botanical source, process, grade and any carrier. |
| Concrete | Intermediate extract in relevant extraction routes. | Its specification and whether that exact input is intended. |
| CO₂ extract | An extraction route using carbon dioxide under defined conditions. | Exact process/product; the label is not an essential-oil substitute. |
Why the same plant name does not guarantee the same input
Different processes need not recover the same material profile. Manufacturer compendia distinguish extract type, plant part and processing information rather than presenting a plant name as a complete identity. That gives you the right question: which product does this formula or comparison actually mean?
Use a fictional example to practise. “Botanical X flower oil”, “Botanical X flower absolute” and “Botanical X absolute preparation in carrier Y” are three separate records until their documentation says otherwise. The third record also includes a supplied preparation. Matching the plant name does not settle the comparison.
The useful conclusion is not that one will always be richer, more realistic or longer lasting. Those are further claims requiring specific evidence or clearly labelled observations. A process name alone cannot supply them.
On a narrow screen, scroll the diagram sideways to read every label.
The bottle may already be a preparation
A naturally derived extract may be supplied in a named medium or at a declared strength. Keep that information with the product name. If an extract is sold as a preparation, the quantity weighed into the next study is the preparation, not automatically the same quantity of the named extract.
Do not infer current strength from an old URL, a shortened invoice name or the appearance of the liquid. Use the current listing and supplier information. If the basis of a percentage is unclear, resolve it before doing a mass-fraction calculation. Product and bottle identities and dilution maths cover those records.
Nor does a process name establish handling suitability, unrestricted use, residue compliance or the documents required for a particular finished product. Those questions belong to the exact supplied material and its intended application, not to a general preference for “natural” ingredients.
Turn the vocabulary into a better next decision
When considering two natural materials, write the reason for the comparison: similar source, different process, different declared preparation, or a desired scent direction. Retain the actual differences instead of treating them as an inconvenience to remove from the notebook.
Before using an alternative in a recorded formula, identify what must be evaluated again: its supplied strength, carrier contribution, scent character and the relevant product information. A process-based comparison can be interesting precisely because the inputs differ; it need not become a claim that they are drop-in replacements.
The extraction name is most useful when it leads to a clearer question. What was extracted, by which route, and what exactly is in the bottle being used? Once those answers are attached to the record, sensory descriptions and formulation decisions have a much firmer starting point.
