Laureth 9
CAS 3055-99-0
EC 221-284-4
Formula C30H62O10
MW 582.807 g/mol
Surfactants Personal Care & CosmeticsPharmaceuticals & Healthcare Emulsification & DispersionSolvent & Carrier
Description
Laureth 9 (CAS 3055-99-0) is a nonionic ethoxylated fatty alcohol surfactant, also known by the abbreviations C12E9 and C12EO9, and the common names Polydocanol and Polidocanol. It carries no assigned E-code and is commercially available under designations such as Do 9/R3.
In pharmaceutical formulations, Laureth 9 functions as a solubiliser and carrier, improving the bioavailability of poorly water-soluble active ingredients by forming stable micellar structures. In personal care products, it acts as an emulsifier by reducing interfacial tension between oil and water phases, enabling stable cream and lotion systems.
Laureth 9 is supplied in gel form and is subject to REACH registration requirements for EU market access. Pharmaceutical-grade material is evaluated against Ph.Eur. monograph standards where applicable. Procurement teams should confirm grade specification and compliance documentation directly with the supplier prior to ordering.
In pharmaceutical formulations, Laureth 9 functions as a solubiliser and carrier, improving the bioavailability of poorly water-soluble active ingredients by forming stable micellar structures. In personal care products, it acts as an emulsifier by reducing interfacial tension between oil and water phases, enabling stable cream and lotion systems.
Laureth 9 is supplied in gel form and is subject to REACH registration requirements for EU market access. Pharmaceutical-grade material is evaluated against Ph.Eur. monograph standards where applicable. Procurement teams should confirm grade specification and compliance documentation directly with the supplier prior to ordering.
Physical Properties
| Melting Point | 33.3-33.6 °C |
| Boiling Point | 615.9±50.0 °C(Predicted) |
| Density | 1.007±0.06 g/cm3 (20 ºC 760 Torr) |
| Flash Point | 244°C (Cleveland open test) |
| Color | White to Off-White |
| Odor | at 100.00?%. bland |
| Form | Gel |
| Refractive Index | n20/D 1.459 |
| pH | pH (50g/l, 25℃) : 4.0～6.0 |
| Log P | 3.029 (est) |
Safety & Handling (Learn More)
Danger GHS05 GHS07 GHS09
H
H302H315H318H319H335H400H412
P
P261P264P270P271P273P280P317P319P321P330P391P405P501P264+P265P301+P317P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P305+P351+P338P305+P354+P338
Trade & Regulatory
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 3 |
Other Names
PolidocanolC12E9C12EO9Do 9/R3PolydocacolANAPOE (R) -C12E9Dodecylnonaglycol
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