Definition
US FDA substance register · UNII 2L2WBY9K6T · registered name NONANAL · single chemical substance
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 124-19-6
- EC No.EU chemical inventory number
- 204-688-5
- DTXSIDUS EPA chemical ID
- DTXSID9021639
- DTXCIDUS EPA compound ID
- DTXCID801639
- IUPAC
- Nonanal
- Molecular formula
- C9H18O
- Molecular weight
- 142.242 g/mol
Measured properties
- Appearance
- liquid
- Colour
- colourless
- Initial boiling point and range
- 190 ℃
- Flash point
- 76 ℃
- Upper/lower flammability or explosive limits
- 5.8 / 0.8 %
- Vapour pressure
- 0.37 ㎜Hg( at 25 C)
- Water solubility
- 96 ㎎/ℓ(at 25C)
- Vapour density
- 4.90 ()
- Relative density
- 0.8264 (: at 22C)
- Molecular weight
- 142.27
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: KOSHA safety data sheets (Korea)
What products actually use it for
What the 53 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Fragrance49
- Flavouring and nutrient2
- Intermediate1
- No specific technical function1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
4 skin studies and 2 eye studies are on record.
The studies disagree (the most common conclusion covers 50%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 6 studies
- Category 6.3A (Category 2)
Skin Irritation · Read Across - Category 2
Skin Irritation · Screening - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · other guideline: EC Directive L251 of 1984-04-25 according to - Classification not possible
Skin Sensitization · Screening - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · EPA OPP 81-4 (Acute Eye Irritation) according to - Classification not possible
Eye Irritation · Screening
Source: US EPA CompTox dashboard
Related literature
- Skin-derived volatile organic compounds trigger redox signalling pathways in human keratinocytes via gas-phase interaction · 2025
- Characterization of aroma profiles of chinese four most famous traditional red-cooked chickens using GC-MS, GC-IMS, and E-nose. · 2023
- Nonanal Sensor Fabrication Using Aldol Condensation Reaction Inside Alkali-Resistant Porous Glass · 2021
- Trials for Gathering Information on an Unknown Peak in the GC-MS Spectra of Horse and Pony Hair Extracts · 2021
- Characterization of Key Aroma Compounds in Beijing Roasted Duck by Gas Chromatography-Olfactometry-Mass Spectrometry, Odor-Activity Values, and Aroma-Recombination Experiments. · 2019
Linked databases 16
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- EU CosIng ingredient list 2
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · English · Japanese · Chinese