Start with the job, not the shared adjective
Two listings can both say “woody”, “floral” or “fresh” and still offer different possibilities. A broad scent word is a useful way to find candidates. It is not enough to choose a substitute, copy a quantity or predict what will happen in a formula.
Write down the particular role you are trying to investigate. “Explore a softer edge beside this dry impression” gives you something to observe. “Find another woody material” leaves the important question unanswered: what do you need the candidate to do in this study?
A better comparison brief
Same description. A narrower question.
“Both candidates are described as woody. I want to compare which one supports the dry character I have recorded in my reference, without assuming equal impact or the same development.” This is a study question, not a substitution recommendation.
Keep purchasing, practical use and sensory learning as separate decisions. A candidate can be interesting to study without being suitable for your intended application or a direct replacement for something you already use.
Compare the products actually supplied
Make two identity cards before planning a trial. Copy the exact listing names, any grade or version suffixes, the source and the relevant preparation information explicitly provided. Keep a link or dated copy of the information you used. Do not shorten two different preparations to the same convenient material name.
Record any stated concentration with its basis and any identified carrier. A missing field remains unknown; do not fill it from an old URL, a similar product or a description elsewhere. If the supplied preparation is unclear in a way that affects the study, resolve that question before proceeding.
Chemical identity and scent description are different kinds of information. ECHA’s substance-identification guidance uses identifiers together with composition and analytical evidence for its regulatory purpose. That is a helpful distinction here: a shared smell word does not establish chemical identity, and this comparison worksheet does not verify composition.
A product name is the beginning of the record
Preserve the exact name on the supplied product and link it to the information available for that preparation. Do not turn an identity check into an assumption that every supplier must provide the same document set or disclose a proprietary formula.
Put the differences in separate rows
Choose a few dimensions that relate to your question. Avoid an overall star score that conceals why one candidate interests you. Leave room for the answer “not established”.
| Dimension | Record for each candidate | Keep separate from |
|---|---|---|
| Supplied identity | Exact product, stated preparation, source and available identifiers | A broad scent-family label |
| Character in the session | Your descriptors, reference and uncertainty | A supplier’s published description |
| Development | Observations at recorded elapsed times | A guaranteed lifetime or evaporation mechanism |
| Practical requirements | The information or qualified checks needed for the intended application | How attractive the sample seems in an observation session |
IFF’s compendium separates odour family, note impact and application-related performance information. Its explanation also directs readers to formal documentation for current specifications. Use published resources as context for the particular material they describe, rather than transferring every entry to a similarly named or diluted product.
Choose what kind of comparison is justified
After the identity cards, decide whether you have enough information for a useful sensory study. If not, the next task is a clarification, not a formula change. You can still record why the candidate was shortlisted and what remains unknown.
- Keep an unchanged reference.Give it a traceable sample identifier. Preserve its actual preparation record rather than reconstructing it from memory.
- State the intended difference.Write what changes between the reference and candidate study. Do not claim they differ in only one factor if their carriers or supplied strengths also differ.
- Choose a justified preparation method.Use an established procedure and relevant supplied information. This worksheet provides neither a universal conversion factor nor a recommended use level.
- Compare the recorded question.Keep an observation of character separate from a later decision about finished-use suitability or compliance.
If the practical question is replacement in a finished product, that needs its own appropriate formulation, stability and safety assessment. A pleasing paper comparison does not answer those questions. It can help decide which candidate is worth investigating next.
Save the reason for the decision
Finish each candidate card with one of three outcomes: continue the study, obtain missing information, or set the candidate aside for this particular brief. Give the reason in plain words. “Different emphasis from the reference” is more useful than “bad substitute”. The material may suit a different creative question.
Keep the original comparison even if a later version works better. Link the new version to the earlier decision so that another person can see what changed and why. Avoid renaming a candidate “equivalent” merely because it shared a descriptor or seemed close during one session.
For the next step, use the comparison planning guide and retain a clear preparation record. A successful shortlist is a reasoned choice about what to study, with the limits of that choice still visible.
