Overview
Nonaethylene Glycol Monododecyl Ether (CAS 3055-99-0 ), commercially known as Laureth-9 , is a nonionic ethoxylated fatty alcohol surfactant used across personal care and pharmaceutical manufacturing.
It functions as an emulsifier, solubilizer, and carrier, enabling the stable incorporation of oils, actives, and poorly water-soluble ingredients into aqueous systems for various industrial applications.
In personal care formulations, Laureth-9 solubilizes fragrance oils and lipophilic actives into clear aqueous bases such as micellar waters, toners, and light serums to ensure product clarity.
Pharmaceutical manufacturers use it as a solubilizing agent and permeation enhancer in topical and semi-solid dosage forms, improving the delivery of active ingredients through formulation matrices.
In cosmetic emulsions and cleansing products, it contributes to stable oil-in-water systems while supporting foam texture and rinse-off performance for high-quality consumer goods.
It also functions as a wetting agent in spermicidal and contraceptive gel formulations, where its surfactant activity is the basis for efficacy in specialized medical applications.
Laureth-9 is supplied as a liquid or low-melting paste depending on temperature and concentration. It is available in cosmetic-grade and pharmaceutical-grade specifications for global supply.
The latter is subject to compendial standards relevant to topical and semi-solid applications. Bulk supply is standard in drums and IBCs to meet the needs of large-scale manufacturing facilities.
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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
Danger GHS05 GHS07 GHS09 Hazard Statements H302 Harmful if swallowed H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation H400 Very toxic to aquatic life H412 Harmful to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 3055-99-0
- EC Number
- 221-284-4
- Mol. Weight
- 582.8
- Category
- Alcohols & Glycols