Octadecanedioic acid
CAS 871-70-5
EC 617-978-5
Formula C18H34O4
MW 314.46 g/mol
Surfactants Personal Care & CosmeticsCoatings, Adhesives, Sealants & ElastomersLubricants & Metalworking LubricationEmulsification & DispersionSurface Modification & Wetting
Description
Octadecanedioic acid (CAS 871-70-5), also known commercially as Emerox 118 and Inherent C 18, is a long-chain aliphatic dicarboxylic acid derived from renewable oleochemical feedstocks. It carries no assigned E-code and is classified under HS code 38231100 within the organic acids category.
In personal care formulations, it functions as an emulsifier and hair conditioner by anchoring to both aqueous and lipid phases through its bifunctional carboxyl groups, improving emulsion stability and deposit on the hair shaft. In industrial lubricants and metalworking fluids, its C18 backbone reduces interfacial friction and provides film-forming protection on metal surfaces.
Octadecanedioic acid is supplied at 95%+ purity and falls under REACH registration requirements for EU market supply. Procurement teams should confirm grade suitability against application-specific standards, as cosmetic applications may require additional documentation. Standard packaging formats should be confirmed with the supplier at the time of inquiry.
In personal care formulations, it functions as an emulsifier and hair conditioner by anchoring to both aqueous and lipid phases through its bifunctional carboxyl groups, improving emulsion stability and deposit on the hair shaft. In industrial lubricants and metalworking fluids, its C18 backbone reduces interfacial friction and provides film-forming protection on metal surfaces.
Octadecanedioic acid is supplied at 95%+ purity and falls under REACH registration requirements for EU market supply. Procurement teams should confirm grade suitability against application-specific standards, as cosmetic applications may require additional documentation. Standard packaging formats should be confirmed with the supplier at the time of inquiry.
Physical Properties
| Melting Point | 122-123 °C |
| Boiling Point | 480.9±18.0 °C(Predicted) |
| Density | 0.998±0.06 g/cm3(Predicted) |
| Color | White to Almost white |
| Form | Liquid |
| Water Solubility | 148.5μg/L at 25℃ |
| Vapor Pressure | 0Pa at 25℃ |
| Refractive Index | 1.486 |
| Log P | 6.121 |
Safety & Handling (Learn More)
Warning GHS07
H
H315H319H335
P
P261P264P271P280P319P321P405P501P264+P265P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 38231100 |
Other Names
octadecane-1,18-dioic acidEmerox 118Inherent C 18Octadecandisure1,18-Octadecadioic acid1,16-Dicarboxyhexadecane1,18-Octadecanedioic acid
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