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Organic Acids REACH

Octadecanedioic acid

CAS Number
871-70-5
EC Number
617-978-5
Chemical Formula
C18H34O4
Molecular Weight
314.5 g/mol
Industries:Lubricants & MetalworkingCoatings, Adhesives, Sealants & ElastomersPersonal Care & Cosmetics

Description

Octadecanedioic acid (CAS 871-70-5 ) is a long-chain dicarboxylic acid used as a functional building block and performance additive across lubricant, coating, and personal care formulations. Its symmetrical 18-carbon diacid structure enables surface modification, emulsification, and lubrication functions that shorter-chain diacids cannot match in industrial applications. In lubricant and metalworking fluids, it acts as a friction modifier and corrosion inhibitor, improving film persistence on metal surfaces under load for better performance. Coating and adhesive formulators incorporate it into polyamide and polyester resins to enhance flexibility, adhesion, and substrate wetting in various industrial finishes and protective layers. Personal care manufacturers use it to modify emulsion texture and improve spreadability in skin-conditioning products, providing a smooth and consistent application for the end user. Sealant and elastomer compounders also source it as a chain extender or crosslinking co-monomer to tune mechanical properties in specialty polymer systems and high-performance materials. Octadecanedioic acid is supplied as a white to off-white powder or flake. Technical grade is the standard commercial form for industrial applications including lubricants and coatings. Higher-purity grades are available for personal care and cosmetic formulations where tighter specification control is required to meet the rigorous demands of the beauty industry. Contact us for supply of Octadecanedioic acid Request Quote

Other Names (Synonyms)

octadecane-1,18-dioic acid | RSZ6PQ0QQJ | RefChem:167600 | 1,18-Octadecanedioic acid | 1,16-Hexadecanedicarboxylic acid | 1,16-Dicarboxyhexadecane | Emerox 118

Key Technical Features

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

Physical Properties

Melting Point122-123 °C
Boiling Point480.9±18.0 °C(Predicted)
Density0.998±0.06 g/cm3(Predicted)
ColorWhite to Almost white
FormLiquid
Water Solubility148.5μg/L at 25℃
Vapor Pressure0Pa at 25℃
Refractive Index1.486
Log P6.121

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary Statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
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.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code38231100