Scent & character
The cited supplier describes coumarin as a sweet, herbaceous crystalline material with a hay-like impression in dilution. It is a separate material from tonka extracts and from products sold as coumarin substitutes. Record whether your bottle contains crystals or a prepared solution.
STUDY PROMPT
Compare coumarin and vanillin separately. Write down the quality of the sweetness rather than only its apparent strength. Then compare small documented variations in a lavender study.
Materials to compare
Use these as starting points for separate blotter comparisons and small, documented studies. A pairing is a question to explore, not a finished formula.
Identity & reference names
CAS reference: 91-64-5. This identifies the reference chemical, not the composition or strength of every supplier product.
Wikidata identity record · PubChem reference. Identifier data retrieved 2026-09-27; Wikidata structured data is CC0.
Record the exact material
Record the exact supplier product, grade, batch, and stock strength. Materials with similar names can have different composition and performance. Read the supplier documentation for your actual material before handling or using it.
Note placement describes a useful study role, not a precise evaporation clock. Dilution, the surrounding formula, and your own perception affect what you notice.
Material reference
Perfumer’s Apprentice: Coumarin crystals ↗This profile is an educational reference, not a material specification or a safety assessment.