Ingredient Dictionary

2,4-HEXADIENAL

2,4-Hexadienal (89% trans, trans isomer; 11% cis, trans isomer) can cause cancer according to The National Toxicology Program.

Definition

2,4-Hexadienal (89% trans, trans isomer; 11% cis, trans isomer) can cause cancer according to The National Toxicology Program.

Source: PubChem

US FDA substance register · UNII 878K4I6N7T · registered name SORBALDEHYDE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Gives the product a scentPERFUMING

Safety & regulatory references

Banned: International fragrance standard (IFRA) · Taiwan

Source: IFRA fragrance standards · MFDS (Korea) cosmetic regulatory information · Taiwan FDA cosmetic ingredients

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

Names & identifiers

2,4-HEXADIENALINCI2,4-헥사다이엔알Korean label name (MFDS standard)2,4-Hexadienal, (E,E)-Synonym

CAS No.chemical registry number: 142-83-6
EC No.EU chemical inventory number: 205-564-3
DTXSIDUS EPA chemical ID: DTXSID2025391
DTXCIDUS EPA compound ID: DTXCID205391

IUPAC: (2E,4E)-Hexa-2,4-dienal
Molecular formula: C6H8O
Molecular weight: 96.129 g/mol

Measured properties

Appearance: Yellow liquid, [MSDSonline] · Yellow liquid, powerful but sweet-green aroma, in dilution pleasant citrusy green
Boiling point: 174 °C, 76 °C @ 30 mm Hg · 64 °C (15 mm Hg)
Solubility: In water, 8.1X10+3 mg/L @ 25 °C /Estimated/ · Slightly soluble in water, miscible in oils
Density: 0.898 @ 20 °C · 0.896-0.902 (20 °C)
Initial boiling point and range: 174 ℃
Flash point: 67 ℃(c.c.)
Vapour pressure: 4.810 ㎜Hg
Water solubility: 8140 ㎎/ℓ
Relative density: 0.898 (20 C)
n-Octanol/water partition coefficient (Kow): 1.370
Molecular weight: 96.1282

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 3 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.

Flavouring and nutrient2
Fragrance1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 1 eye studies are on record.

Classed as moderate1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 4 studies

Classification not possible
Skin Sensitization · Screening
Category 1
Skin Irritation · Screening
SkinIrr2
Skin Irritation · QSAR Predicted
Category 1
Eye Irritation · Screening