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| Catalog Number | CI-SC-0333 |
| Product Name | Steareth-2 |
| CAS | 9005-00-9 |
| Description | Acts as solid non-ionic O/W emulsifier. It is a fatty alcohol polyglycol ether with non-ionic character. Saponification value 2.0 maximum. |
| Appearance | White waxy solid |
| Application | Emulsions for skin and hair care products |
| Storage | Store light-protected at a cool and dry place |
| HS Code | 3402130000 |
| INCI | Steareth-2 |
| Uses | Recommended use level 1-5%. For external use only. |
Steareth-2 serves as a versatile component in personal care formulations, functioning primarily as an auxiliary oil-in-water emulsifier. As a nonionic surfactant with a hydrophilic-lipophilic balance (HLB) value of 4.9, it is optimized for emulsifying ceto-stearyl alcohols and facilitating the creation of stable emulsions, even in challenging conditions with high electrolyte concentrations or up to 25% ethanol. Beyond its emulsifying capabilities, Steareth-2 acts as a wetting agent, solubilizer, conditioner, and coupling agent, finding extensive applications in cosmetics and toiletries such as creams, lotions, deodorants, antiperspirants, and shaving products. It is particularly beneficial due to its solubility in alcohol and cottonseed oil while remaining insoluble in water and propylene glycol. Additionally, its compatibility with oleosome and phosphosome formulations, as well as its stability across a range of pH levels, permits its use in creams, lotions, and sprayable products. Steareth-2 is typically formulated at concentrations ranging from 0.5% to 5%, and when used in conjunction with Steareth-21, it demonstrates enhanced emulsifying performance in a broad spectrum of personal care products.
What is Steareth-2, and what are its primary applications in personal care products?
Steareth-2 is a white, soft solid and a 2-mole ethoxylate of stearyl alcohol. It serves as an auxiliary oil-in-water emulsifier with an HLB value of 4.9. Its multifunctional properties include use as a nonionic surfactant, wetting agent, solubilizer, conditioner, and coupling agent in personal care applications. Some of its common applications can be found in products like cream rinses, conditioners, bath oils, creams, lotions, deodorants, antiperspirants, and shaving products.
How does Steareth-2 perform as an emulsifier in formulations containing ethanol or high electrolyte concentrations?
Steareth-2 is particularly effective in emulsifying ceto-stearyl alcohols and oil-in-water emulsions, even in the presence of up to 25% ethanol or high electrolyte concentrations. It exhibits both low and high pH resistance, making it suitable for stable formulations in various challenging conditions. Combined with Steareth-21, it offers enhanced emulsifying performance, making it an ideal choice for sprayable personal care products.
Is Steareth-2 soluble in water, and what are its solubility characteristics with other substances?
Steareth-2 is insoluble in water and propylene glycol but is soluble in alcohol and cottonseed oil. This solubility profile makes it versatile for use in alcohol-based formulations and other oil-in-water emulsions where water solubility is not required.
Can Steareth-2 be used safely in various pH environments, and does it affect the scent of personal care products?
Yes, Steareth-2 can be used in various pH environments as it exhibits low and high pH resistance, enhancing its versatility across different formulations. Additionally, it is a mild, virtually odorless nonionic surfactant, ensuring that it does not interfere with the scent profiles of personal care products.
What concentration range of Steareth-2 is typically recommended for use in cosmetic formulations?
Steareth-2 is typically used within a concentration range of 0.5-5% in cosmetic formulations. This range is effective for achieving the desired emulsifying and conditioning effects in a variety of personal care products.
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