Alcohols & Glycols
REACH
Isoamyl alcohol
CAS Number
123-51-3
EC Number
204-633-5
FEMA Number
FEMA 2057
What is Isoamyl alcohol?
Isoamyl alcohol (CAS 123-51-3), also known as isopentyl alcohol, is a short-chain primary alcohol. FEMA 2057.
Where is Isoamyl alcohol used?
- Flavor and fragrance: recognized flavoring ingredient and precursor to isoamyl acetate for banana and pear notes in confectionery, beverages and artificial flavor systems
- Personal care: solvent and fixative in fragrance compositions
- Plastics and polymers: reactive intermediate and process solvent in resin curing and cross-linking
- Pharmaceutical synthesis: chemical building block
- It also serves as an extraction solvent in laboratory and industrial separation processes.
Good to know: Food-grade material meeting FCC specifications is available for flavoring applications, while technical-grade is standard for industrial and polymer uses.
Commercial specifications
- Purity levels typically range from 98% to 99%+
- Specific purity depends on grade and intended application
- Clear liquid in drum, IBC and bulk quantities
Other Names (Synonyms)
primary isoamyl alcohol|Methyl-3-butan-1-ol|Isopentyl alcohol|isopentan-1-ol|Isobutyl carbinol|Isoamyl alkohol|Isoamyl alcohol (natural)|Isoamyl alcohol (3-methyl butanol)
What are the physical properties of Isoamyl alcohol?
Melting Point -117.2 °C
Boiling Point 132.5 °C
Density 0.813 g/cm³ @ Temp: 15 °C
Flash Point 109.4 °F
Appearance Amyl alcohols (pentanols) have eight isomers. All are flammable, colorless liquids, except the isomer 2,2- dimethyl-1-propanol, which is a crystalline solid.
Color <20(APHA)
Odor Mild odor; alcoholic, non-residual.
Form Liquid
Water Solubility 25 g/L (20 ºC)
Vapor Pressure 2 mm Hg ( 20 °C)
Refractive Index n 20/D 1.407
pH 7 (25g/l, H2O, 20℃)
Log P 1.35 at 20℃
How is Isoamyl alcohol classified and handled safely? Learn More
Danger
GHS02· Flammable GHS05· Corrosive GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H226 Flammable liquid and vapor
H302 Harmful if swallowed
H303 May be harmful if swallowed
H313 May be harmful in contact with skin
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 Isoamyl alcohol?
HS Code 29335995
UN Number 1105
ADR Class 3
Packing Group III
Storage Class 3 - Flammable liquids
WGK (Germany) 1