Flavors & Fragrances
REACH
Hexanal
CAS Number
66-25-1
EC Number
200-624-5
FEMA Number
FEMA 2557
What is Hexanal?
Hexanal (CAS 66-25-1), also known as n-Caproaldehyde, is a short-chain aliphatic aldehyde used as a flavoring and fragrance ingredient. FEMA 2557.
Where is Hexanal used?
- Food and beverage flavoring: fresh, cut-grass character in fruit flavors
- Apple, citrus and tomato profiles: trace concentrations to enhance naturalness
- Fragrance: green top-note lift in floral and chypre compositions
- Personal care and household cleaners: fresh, natural-green olfactive character in shampoos and body washes
- It serves as a reference standard and process marker in food quality research.
Good to know: Hexanal concentration is monitored as an indicator of lipid oxidation in packaged foods.
Commercial specifications
- Purity typically 98% or higher for demanding compounding applications
- Flavor and fragrance grades
- Packaging from small drums to bulk quantities
Other Names (Synonyms)
n-Hexylaldehyde|n-Hexanal|n-Caproaldehyde|hexyl aldehyde|Caproic aldehyde|1-Hexanal
What are the physical properties of Hexanal?
Melting Point -56 °C
Boiling Point 131 °C @ Press: 760 Torr
Density 0.8335 g/cm³ (liquid) @ Temp: 25 °C
Flash Point 90 °F
Appearance liquid
Color Clear colorless to slightly yellow
Odor Pungent.
Form Liquid
Water Solubility 4.8 g/L (20 ºC)
Vapor Pressure 10 mm Hg ( 20 °C)
Refractive Index n 20/D 1.4035(lit.)
pH 4-5 (4.8g/l, H2O, 20℃)
Log P 1.97
How is Hexanal classified and handled safely? Learn More
Warning
GHS02· Flammable GHS07· Irritant
Hazard Statements
H226 Flammable liquid and vapor
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
Which trade and regulatory codes apply to Hexanal?
HS Code 29121900
UN Number 1207
ADR Class 3
Packing Group III
Storage Class 3 - Flammable liquids
WGK (Germany) 1