Ingredient Dictionary

UNDECYLENAL

10-undecenal is an undecenal in which the C=C bond is at the 10-11 position.

Definition

10-undecenal is an undecenal in which the C=C bond is at the 10-11 position.

Source: PubChem

US FDA substance register · UNII DU1OTA08RY · registered name 10-UNDECENAL · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Listed as a fragrance-composition material (not a claim that it adds scent)FRAGRANCEGives the product a scentPERFUMING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

More data — names, identifiers, properties, test records, literature

Names & identifiers

UNDECYLENALINCI운데실렌알Korean label name (MFDS standard)10-UndecenalSynonym

CAS No.chemical registry number: 112-45-8
EC No.EU chemical inventory number: 203-973-1
DTXSIDUS EPA chemical ID: DTXSID3037757
DTXCIDUS EPA compound ID: DTXCID1017757

IUPAC: Undec-10-enal
Molecular formula: C11H20O
Molecular weight: 168.28 g/mol

Measured properties

Appearance: Liquid · colourless to light yellow liquid with a fatty, rose-like odour on dilution
Boiling point: 98.00 to 100.00 °C. @ 3.00 mm Hg · 235 °C
Solubility: 30 mg/L @ 20 °C (exp) · soluble in propylene glycol and most fixed oils, insoluble in glycerol and water
Density: 0.840-0.850
Melting/freezing point: 7 ℃
Initial boiling point and range: 240 ℃
Flash point: 76 ℃
Vapour pressure: 0.04 ㎜Hg (25C)
Vapour density: 5.8 (air=1)
Relative density: 0.8467 (g/cm3 20C)
n-Octanol/water partition coefficient (Kow): 4.12
Molecular weight: 168.31

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: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 31 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.

Fragrance26
Deodorizer3
Flavouring and nutrient2

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

6 skin studies and 2 eye studies are on record.

Classed as highly irritating1Classed as moderate2

The studies disagree (the most common conclusion covers 33%), 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 8 studies

Classification not possible
Skin Irritation · Screening
Category 6.3A (Category 2)
Skin Irritation · Read Across
Moderate or Mild Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Moderate or Mild Irritation
skin irritation: in vivo · Screening · other guideline: according to
Classification not possible
Skin Sensitization · Screening
High Frequency of Sensitization
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to
Classification not possible
Eye Irritation · Screening