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The recordsAll teaching accords

Station 8 of 13 · Accord · the record

A rose, from four molecules

A rose note built from four of its molecules, to smell how a rose is put together.

Teaching accord A teaching accord for learning: not a commercial perfume formula, not a finished perfume, not safety-assessed; do not make it for skin.

Phenylethyl alcohol, citronellol and geraniol make the body; a trace of β-damascenone gives the fruity edge. Take one away and the rose changes shape: that is the lesson.

Read the essay · Its fingerprint in the Olfactory Genome · Its trail in the Spatial Sillage Lab · As a scent instruction (the Device API draft)

The record

Each field carries its evidence: open a chip for the source, the quoted words and the confidence. A field with nothing behind it says so and stays empty.

Name
A rose, from four molecules
house interpretation

the house’s own reading, labelled as such

the house’s name for this teaching accord

confidence C

Purpose
teaching
house rule

the house’s own reading, labelled as such

the site’s rule: every accord on record is a teaching accord; the house’s own formulas are never published here

confidence B

Structure
A rose note assembled from four molecules the filed rose studies name: phenylethyl alcohol, citronellol and geraniol as the body, and a trace of β-damascenone for the fruity, jammy edge.
house interpretation

the house’s own reading, labelled as such

the choice of the four is the house’s; each molecule’s place in rose oil is documented on the component

confidence B

Family
floral (rose)
perfumery convention

the trade’s shared vocabulary; no single source

a rose soliflore by the trade’s convention

confidence B

Components
Under each component, the evidence for its place in the accord. Teaching parts are a house interpretation for learning: modeled, not measured, not a formula.
ComponentRoleTeaching partsVolatility
2-phenylethyl alcohol
documented

phenyl ethyl alcohol

S4 · Xiao et al. (2017). Verification of key odorants in rose oil by gas chromatography-olfactometry/aroma extract dilution analysis, odour activity value and aroma recombination · read 2026-09-27

the component is a named constituent of rose otto (rose oil; Bulgarsko rozovo maslo, PGI) (that record’s identity field); S4 lists it among the important rose-oil odorants (abstract; species not stated)

confidence A

heart
documented

Floral notes, such as rose, jasmine, orange blossom, or lavender, are typically middle notes defining the “heart” of many perfumes

KLE-1 · Kleoff et al. (2022). Synthesis of odorants in flow and their applications in perfumery · read 2026-09-30

the review names rose among the floral heart notes

confidence A

45 parts
modeled

modeled

teaching proportions, a house interpretation for learning: modeled, not measured, not a formula, not for making

confidence C

not on record
why

no volatility class on record for phenylethyl-alcohol

Citronellol
measured

Acyclic monoterpene alcohols citronellol (20.35-44.75%) and geraniol (15.63-27.76%) were highest

S6 · Kumar et al. (2023). Phenotyping floral traits and essential oil profiling revealed considerable variations in clonal selections of damask rose (Rosa damascena Mill.) · read 2026-09-27
S4 · Xiao et al. (2017). Verification of key odorants in rose oil by gas chromatography-olfactometry/aroma extract dilution analysis, odour activity value and aroma recombination · read 2026-09-27
GC-2 · Ulusoy et al. (2009). Tocopherol, carotene, phenolic contents and antibacterial properties of rose essential oil, hydrosol and absolute · read 2026-09-27

the component is a named constituent of rose otto (rose oil; Bulgarsko rozovo maslo, PGI) (that record’s identity field)

confidence A

heart
documented

Floral notes, such as rose, jasmine, orange blossom, or lavender, are typically middle notes defining the “heart” of many perfumes

KLE-1 · Kleoff et al. (2022). Synthesis of odorants in flow and their applications in perfumery · read 2026-09-30

the review names rose among the floral heart notes

confidence A

30 parts
modeled

modeled

teaching proportions, a house interpretation for learning: modeled, not measured, not a formula, not for making

confidence C

not on record
why

no volatility class on record for citronellol

Geraniol
measured

geraniol (15.63-27.76%)

S6 · Kumar et al. (2023). Phenotyping floral traits and essential oil profiling revealed considerable variations in clonal selections of damask rose (Rosa damascena Mill.) · read 2026-09-27
GC-2 · Ulusoy et al. (2009). Tocopherol, carotene, phenolic contents and antibacterial properties of rose essential oil, hydrosol and absolute · read 2026-09-27

the component is a named constituent of rose otto (rose oil; Bulgarsko rozovo maslo, PGI) (that record’s identity field)

confidence A

heart
documented

Floral notes, such as rose, jasmine, orange blossom, or lavender, are typically middle notes defining the “heart” of many perfumes

KLE-1 · Kleoff et al. (2022). Synthesis of odorants in flow and their applications in perfumery · read 2026-09-30

the review names rose among the floral heart notes

confidence A

24.9 parts
modeled

modeled

teaching proportions, a house interpretation for learning: modeled, not measured, not a formula, not for making

confidence C

not on record
why

no volatility class on record for geraniol

β-damascenone
documented

Several of the key flavor compounds in rose essential oil are C(13)-norisoprenoids, such as beta-damascenone

S5 · Huang et al. (2009). Substrate promiscuity of RdCCD1, a carotenoid cleavage oxygenase from Rosa damascena · read 2026-09-27

the component is a named constituent of rose otto (rose oil; Bulgarsko rozovo maslo, PGI) (that record’s identity field)

confidence A

trace
perfumery convention

the trade’s shared vocabulary; no single source

a trace: its odour threshold on record is very low (the molecule record), so a trace is enough by convention

confidence B

0.1 parts
modeled

modeled

teaching proportions, a house interpretation for learning: modeled, not measured, not a formula, not for making

confidence C

not on record
why

no volatility class on record for beta-damascenone

Substitutions
  • For 2-phenylethyl alcohol (phenylethyl alcohol, PEA): Rose absolute in place of phenylethyl alcohol: the absolute’s primary component on record is phenylethyl alcohol. (rose absolute)
    inferred

    This represents the initial study to examine the antibiofilm and antivirulence capabilities of rose absolute and its primary component, phenylethyl alcohol.

    GC-1 · Çevikbaş et al. (2024). Exploring rose absolute and phenylethyl alcohol as novel quorum sensing inhibitors in Pseudomonas aeruginosa and Chromobacterium violaceum · read 2026-09-27

    inferred from the rose absolute record; the absolute brings its other constituents with it

    confidence B

Regulations that apply to a component
Odour descriptors

Causal Debugger why did this change matter?

Teaching accord · modeled A teaching accord for learning: not a commercial perfume formula, not a finished perfume, not safety-assessed; do not make it for skin. Everything below is computed by a teaching model from the records: modeled, not measured, and not a prediction of how any real perfume smells. Regulation lines are flags, not legal advice.

Change one thing and follow it down the chain: the proportions, the molecules, the words on record, a modeled reading, the dry-down, odour activity where a threshold is measured, the regulations, the provenance. Then: why it mattered.

One change

Without JavaScript these controls stay still: every single change is worked out below.

Modeled · before → after

Choose one component and one change: each layer of the chain appears here, labelled modeled, each input with its evidence.

Every single change, worked out without JavaScript: the worked cases.

What the model reads, with its evidence

2-phenylethyl alcohol
descriptors: floral, honey
documented

Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · listed on the record

the record

· class: heart (role) · threshold: 140 µg/kg in water
measured

Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · listed on the record

the record

· regulation: none on record · provenance: occurs in rose absolute; occurs in rose otto
citronellol
descriptors: soapy, rose
documented

Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · listed on the record

the record

· class: heart (role) · threshold: not on record · regulation: Regulation (EC) No 1223/2009 on cosmetic products (a labelling condition (Annex III)); Regulation (EU) 2023/1545 (labelling of fragrance allergens) (a labelling condition, extended to more fragrance allergens) · provenance: occurs in rose otto; occurs in rose absolute
geraniol
descriptors: rose, citrus
documented

Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · listed on the record

the record

· class: heart (role) · threshold: 1.1 µg/kg in water
measured

Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · listed on the record

the record

· regulation: Regulation (EC) No 1223/2009 on cosmetic products (a labelling condition (Annex III)) · provenance: occurs in rose otto; occurs in rose absolute
β-damascenone
descriptors: rose, fruity, jammy
house interpretation

the house’s own reading, labelled as such

the record

· class: none on record · threshold: 0.006 µg/kg in water
measured

Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · listed on the record

the record

· regulation: IFRA Standard: Rose ketones (restriction) · provenance: occurs in rose otto; occurs in rose absolute
rose absolute (a substitute)
descriptors: honey, spicy, floral
house interpretation

the house’s own reading, labelled as such

the record

where the site says it: /materials, “The Precious Materials”

· class: heart (role) · threshold: not on record · regulation: Regulation (EU) 2023/1545 (labelling of fragrance allergens) (a labelling condition, extended to more fragrance allergens) · provenance: from Rosa damascena Mill.; grown in Kazanlak, Rose Valley; grown in Taif

the model’s input as data: /data/causal/rose-teaching-accord.json · the model and its formulas: the site’s build

Perfume Autopsy two versions, side by side

Teaching variants · modeled A teaching accord for learning: not a commercial perfume formula, not a finished perfume, not safety-assessed; do not make it for skin. Its versions below are teaching variants of it, not commercial perfume formulas and not the formula of any real perfume. Everything compared is computed by the teaching model the Causal Debugger uses: modeled, not measured, and not a prediction of how anything smells. Regulation lines are flags, not legal advice.

Pick two versions of this accord and see what changed, then what follows from it: the molecules, the words on record, a modeled reading, the dry-down, odour activity where a threshold is measured, the regulations, the provenance. Then: why it could smell different.

The versions, and why each exists

  1. Version 1 · The rose as written teaching variant, modeled

    Why it exists: the record as written. The rose as the record writes it: phenylethyl alcohol, citronellol and geraniol for the body, and a trace of β-damascenone.

    house interpretation

    the house’s own reading, labelled as such

    the accord record’s structure field: the choice of the four molecules is the house’s; each one’s place in rose oil is documented on its component

    field: this accord’s record · teaching variants · version 1 · why

    confidence B

  2. Version 2 · Citronellol-forward teaching variant, modeled

    Why it exists: A house teaching example: more citronellol and less of the others, the β-damascenone trace halved, to show how the balance of the body moves the words on record.

    house interpretation

    the house’s own reading, labelled as such

    a house teaching example: no filed source documents this version, and it is not a reconstruction of any perfume

    field: this accord’s record · teaching variants · version 2 · why

    confidence C

  3. Version 3 · Damascenone-forward teaching variant, modeled

    Why it exists: A house teaching example: five times the β-damascenone, to show how far a trace with a low measured odour threshold reaches. β-Damascenone is one of the rose ketones an IFRA Standard (the industry’s own standard, not law) restricts by concentration in finished products; this teaching accord is not a finished product and is not assessed.

    house interpretation

    INTRINSIC PROPERTY DRIVING RISK MANAGEMENT: DERMAL SENSITIZATION

    International Fragrance Association (IFRA) · listed on the record

    the standard is documented (its Regulation record); the version is the house’s teaching choice. US law: not on record

    field: this accord’s record · teaching variants · version 3 · why

    confidence C

    IFRA Standard: Rose ketones (IFRA: an industry standard, not law)

Each version in teaching parts (modeled; each version adds up to 100 parts; a dash: not in that version)
ComponentV1V2V3
2-phenylethyl alcohol453545
citronellol304527
geraniol24.919.9527.5
β-damascenone0.10.050.5

With JavaScript, any two of the 3 versions can be compared.

Modeled · A → B

Pick two versions above to compare them. Version 1 against version 2, worked out without JavaScript: the worked comparison.

the comparison’s input as data: the versions of this accord (JSON) · the model, as code, built on the Causal Debugger’s model

Sources

  1. KLE-1 · Kleoff M, Kiler P, Heretsch P. Synthesis of odorants in flow and their applications in perfumery. Beilstein J Org Chem. 2022;18:754–768. doi.org/10.3762/bjoc.18.76 · read 2026-09-30 · CC BY 4.0
  2. S4 · Xiao Z, Li J, Niu Y, Liu Q, Liu J. Verification of key odorants in rose oil by gas chromatography-olfactometry/aroma extract dilution analysis, odour activity value and aroma recombination. Natural Product Research 2017;31(19):2294–2302. DOI 10.1080/14786419.2017.1303693. PMID 28347181. doi.org/10.1080/14786419.2017.1303693 · read 2026-09-27 · publisher's terms (Taylor & Francis; subscription, no open licence); single facts and short quotes only, under fair use (quoted, not reproduced)
  3. S6 · Kumar A, Gautam RD, Singh S, Chauhan R, Kumar M, Kumar D, Kumar A, Singh S. Phenotyping floral traits and essential oil profiling revealed considerable variations in clonal selections of damask rose (Rosa damascena Mill.). Scientific Reports 2023;13:8101. DOI 10.1038/s41598-023-34972-5. PMID 37208367. PMCID PMC10198992. doi.org/10.1038/s41598-023-34972-5 · read 2026-09-27 · CC BY 4.0
  4. GC-2 · Ulusoy S, Boşgelmez-Tınaz G, Seçilmiş-Canbay H. Tocopherol, carotene, phenolic contents and antibacterial properties of rose essential oil, hydrosol and absolute. Current Microbiology 2009;59(5):554–558. DOI 10.1007/s00284-009-9475-y. PMID 19688375. doi.org/10.1007/s00284-009-9475-y · read 2026-09-27 · publisher's terms (no open licence deposited); single facts and short quotes only, under fair use (quoted, not reproduced)
  5. S5 · Huang FC, Horváth G, Molnár P, Turcsi E, Deli J, Schrader J, Sandmann G, Schmidt H, Schwab W. Substrate promiscuity of RdCCD1, a carotenoid cleavage oxygenase from Rosa damascena. Phytochemistry 2009;70:457–464. DOI 10.1016/j.phytochem.2009.01.020. PMID 19264332. doi.org/10.1016/j.phytochem.2009.01.020 · read 2026-09-27 · publisher's terms (no open licence deposited); single facts and short quotes only, under fair use (quoted, not reproduced)
  6. GC-1 · Çevikbaş H, Ulusoy S, Kaya Kinaytürk N. Exploring rose absolute and phenylethyl alcohol as novel quorum sensing inhibitors in Pseudomonas aeruginosa and Chromobacterium violaceum. Scientific Reports 2024;14:15666. DOI 10.1038/s41598-024-66888-z. PMID 38977845. PMCID PMC11231148. doi.org/10.1038/s41598-024-66888-z · read 2026-09-27 · CC BY 4.0

Our text and structure are CC BY 4.0; quoted source text stays under its owners’ terms.

this record as data: /data/accord/rose-teaching-accord.json · version 3 · updated 2026-09-30 · confidence A