Terms

This page is a reference, not a regulatory authority. Check the current IFRA standard and the supplier’s safety data sheet before you formulate.

That line sits at the foot of every material’s safety panel, and it is the whole of the site’s posture. Concretely:

• Nothing here is safety, regulatory, medical or legal advice. IFRA Standards are amended, and an entry reflects the amendment it cites — not necessarily the one in force today.
• The authoritative document for the material in your hand is the supplier’s: their safety data sheet and their specification, for that batch. This site is not a substitute for either, and it does not know what you actually bought.
• Where an entry records that no IFRA Standard applies, that is a statement about a specific amendment that was checked. It is not a statement that a material is safe.
• Predicted odour descriptors are model output. They appear only inside a module labelled as experimental, they are stamped with the model that produced them, and they are not editorial content. Do not read them as findings.
• Computed values — logP, similarity, structural class — are recomputations from a structure, stamped with the software version that produced them. They are not cited facts and no one has measured them.

Every fact-bearing statement in the codex carries a citation to the source it came from. Follow the citation. That is what it is for, and it is the honest way to use this site.

A curated, citation-driven reference for aromachemicals, written and edited by Davis Kim. It is free to read, needs no account, and is published as open source. An account adds two things and nothing else: saved materials, and private notes.

The material data is licensed CC BY-SA 4.0. You may use it, including commercially, on two conditions: attribute it, and license any derivative dataset under the same terms.

The attribution I ask for is:

Material data from Perfumers Codex (https://perfumerscodex.com), licensed CC BY-SA 4.0.

If you want the dataset in bulk, ask me rather than scraping the site. It is licensed for you to have; a copy is easier for both of us than thousands of requests.

The application’s source is licensed MIT, © 2026 Davis Kim. Fork it, change it, sell it — keep the copyright notice.

Two things the licences above do not cover. Chemical structure depictions and third-party reference documents belong to whoever published them and are cited, not relicensed. And any third-party dataset used to train the experimental odour model keeps its own licence: it is not part of the material data and is not released under CC BY-SA.

• The structure search on /structure runs RDKit.js in your browser, © Valence Discovery Inc., Greg Landrum, Paolo Tosco and other RDKit contributors, under the BSD 3-Clause License.
• The “View in 3D” model on material pages is drawn by 3Dmol.js, © the University of Pittsburgh and contributors, under the BSD 3-Clause License.
• The typeface is JetBrains Mono, © The JetBrains Mono Project Authors, under the SIL Open Font License 1.1.
• The “Continue with Google” button is set in Roboto, © The Roboto Project Authors, under the SIL Open Font License 1.1. The Google “G” is Google’s mark, used as its sign-in branding guidelines require.

• You need to be 16 or over to make an account.
• Give a real email address you can receive mail at — it is how you confirm the account and reset the password. If you sign in with Google instead, Google’s terms also apply to that sign-in.
• Your password is yours to look after. What happens under your account is your responsibility; tell me if you think someone else has got into it.
• One account per person. Don’t sign up as someone else, and don’t sign up as a program.
• You can delete your account at any time from the account page. It is immediate and permanent, and it takes your saved materials and notes with it. The same page lets you download everything the account holds first.
• I may suspend or remove an account being used to attack the site, to reach other people’s data, or to do something plainly unlawful.

Read it, cite it, build on it, teach from it. The things not to do are the obvious ones:

• Don’t attack the site, probe it for holes, or try to reach data that is not yours — other people’s notes especially.
• Don’t hammer it with automated traffic. Requesting it faster than a person could read it degrades it for everyone, and the bulk data is available for the asking.
• Don’t use it to impersonate the project, or to present its content as regulatory clearance for a product.
• Notes are a scratchpad, not a records system. Don’t keep anything in them that you cannot afford to lose, and don’t put other people’s personal information in them.

Editorial control rests with me: I write the entries and I decide what goes in. That is what keeps the citation standard consistent, and it is the project’s whole point of difference.

Corrections are genuinely welcome, and an error with a source behind it will be fixed. A form for submitting them is planned but not built yet, so for now the route is email. If you send a correction, you are confirming it is yours to send, and you are letting me publish it under the data licence above.

The site is provided as it is, free, with no warranty of any kind — not of accuracy, completeness, currency, availability or fitness for any purpose. Entries can be wrong. Sources can be superseded. The site can be down, and it can lose data.

Independent verification is not a formality here. It is the correct way to use a reference before you put a material on skin.

To the fullest extent the law allows, I am not liable for any loss or damage arising from your use of this site or your reliance on anything in it — including any formulation, purchase, regulatory or commercial decision you take on the strength of it. Where liability cannot be excluded, it is limited to the amount you have paid to use the site, which is nothing.

Nothing here tries to exclude liability that cannot lawfully be excluded — including for death or personal injury caused by negligence, or for fraud.

This is a free project maintained by one person in his own time. I may change, move, restrict or withdraw the site or any part of it at any time, without notice, and I am not obliged to keep it running.

If these terms change, the date at the top of this page changes with them. The data and code licences are perpetual and are not affected by any of this — anything already released under them stays released.

These terms are governed by the law of [ maker: governing law and venue — to be decided ]. This clause is deliberately unfilled rather than guessed at.

Questions about these terms, licensing, or bulk data go to the same address as everything else: [ maker: contact email — hello@perfumerscodex.com is planned but not live yet ]

See also the privacy policy, which describes what the site collects and how to delete it.