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3,5,5-Trimethylhexanoic acid

CAS Number
3302-10-1
EC Number
221-975-0
Chemical Formula
C9H18O2
Molecular Weight
158.24 g/mol

Description

3,5,5-Trimethylhexanoic acid (CAS 3302-10-1 ), also marketed as Isononanoic acid and KYOWANOIC N, is a branched-chain fatty acid used as a chemical building block across coatings, lubricants, and polymer systems. Its branched structure drives performance in ester synthesis, where linear alternatives fall short on solubility or low-temperature behavior. In lubricant formulations, it is esterified to produce synthetic base fluids. These functional additives deliver effective lubrication under high-load or wide-temperature conditions. Coatings manufacturers use it to synthesize alkyd resins and metallic driers for industrial applications. The branched chain improves drying performance and film flexibility in various surface treatments. The plastics and polymer industry relies on it as a precursor to plasticizer esters for durability. This is particularly useful where low volatility and compatibility with PVC or elastomers are required. It also functions as a corrosion inhibitor component in metalworking fluids and automotive system additives. 3,5,5-Trimethylhexanoic acid is supplied as a clear liquid in drum and IBC quantities, with bulk tanker options available for larger industrial volumes. Technical grade is the standard commercial specification. This grade is ideal for industrial synthesis applications. Purity levels are typically 98% or higher, with documentation to support use in regulated downstream formulations and chemical manufacturing processes. Contact us for supply of 3,5,5-Trimethylhexanoic acid Request Quote

Other Names (Synonyms)

Hexanoic acid, 3,5,5-trimethyl- | KYOWANOIC N | ISONONANIOC ACID | ISONONANOIC-ACID | AW943Q219O | 3,5,5-Trimethyl-n-hexanoic acid | 3,5,5-Trimethylcaproic acid | Nonanoic Acid

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-70°C
Boiling Point103-104 °C @ Press: 6 Torr
Density0.91 g/cm³ (liquid)
Flash Point125°C
Appearancecolourless liquid
ColorColorless to Almost colorless
Formclear liquid
Water Solubility700mg/L at 20℃
Vapor Pressure0.46Pa at 20℃
Refractive Index1.4278-1.4298
Log P3.2 at 25℃

Safety & Handling

Danger
GHS05· CorrosiveGHS07· Irritant

Hazard Statements

H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation

Precautionary Statements

P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code2915907098