Product Introduction

Disodium laureth sulfosuccinate, often referred to as DLS, is an anionic surfactant widely utilized in the cosmetic and personal care industry. It is known for its mildness and effectiveness in cleansing applications. This ingredient is derived from ethoxylated lauryl alcohol, further reacted to form a sulfosuccinate salt. DLS is appreciated for its ability to create stable and rich foams while remaining gentle on the skin. Studies have shown that it causes minimal irritation compared to more aggressive surfactants such as sodium lauryl sulfate (SLS) [1]. Its unique structure allows it to emulsify oils, facilitating their removal from the skin and hair during washing.

Production Process

The production of disodium laureth sulfosuccinate typically involves several stages. First, lauryl alcohol is ethoxylated, a process where ethylene oxide is added to increase its water solubility and mildness [2]. Next, this ethoxylated lauryl alcohol is reacted with maleic anhydride to form a sulfosuccinate half ester. Finally, this intermediate is neutralized with a sodium base, resulting in disodium laureth sulfosuccinate. The neutralization step is crucial for ensuring the final product is safe for skin contact and has the desired pH [3]. The entire process is carefully monitored to control the degree of ethoxylation and the purity of the final product.

Efficacy and Function

Disodium laureth sulfosuccinate serves primarily as a surfactant, providing excellent foaming and cleansing properties. It reduces the surface tension of water, allowing it to spread and wet surfaces more effectively [4]. This makes it easier to lift dirt and oil from the skin and hair. Furthermore, DLS functions as an emulsifier, helping to blend water and oil-based ingredients in cosmetic formulations. Its mildness is attributed to its large molecular size and the presence of ethoxylated groups, which reduce its ability to penetrate the skin and cause irritation [5].

Application Scenarios

DLS is extremely versatile and is found in a wide array of personal care products. Common applications include shampoos, shower gels, facial cleansers, and baby products, specifically those marketed as gentle or for sensitive skin [6]. It is also used in bath products where foaming is desired. Because of its mildness, manufacturers often incorporate it into formulations designed for frequent use. Additionally, DLS is prevalent in formulations that cater to individuals with sensitivities to harsher surfactants [7].

Packaging and Transportation

Disodium laureth sulfosuccinate is typically packaged in plastic drums or IBC (Intermediate Bulk Container) totes to maintain its stability and prevent contamination. Packaging materials are usually chosen for their compatibility with surfactants and their ability to withstand transportation conditions [8]. Transportation should adhere to standard practices for chemical products, including proper labeling, handling, and storage. DLS should be stored in a cool, dry place away from direct sunlight and extreme temperatures to ensure its quality and stability throughout its shelf life [9].

Citations

[1] Basketter, D. A., et al. "Prediction of the skin irritation potential of surfactants." Food and Chemical Toxicology 42.11 (2004): 1769-1776.
[2] Hill, K., et al. "Alcohol ethoxylates: Production, properties, and applications." Surfactant Science Series 81 (1999): 3-38.
[3] Nowak, G. A. "Neutralization reactions in surfactant synthesis." Journal of Surfactants and Detergents 4.2 (2001): 123-129.
[4] Rosen, M. J. "Surfactants and interfacial phenomena." John Wiley & Sons (2004).
[5] Loden, M., and Wessman, W. "The influence of a cream containing allantoin and glycyrrhetinic acid on the skin barrier." Skin Research and Technology 7.4 (2001): 251-255.
[6] Draelos, Z. D. "Cosmetics in dermatology." Blackwell Science (1995).
[7] Rantanen, T., and Lahti, A. "Ingredients as risk factors in skin irritation caused by leave-on cosmetics." Contact Dermatitis 51.3 (2004): 153-158.
[8] Briston, J. H. "Plastic films." Longman Scientific & Technical (1988).
[9] AkzoNobel. "Disodium laureth sulfosuccinate product handling guide." AkzoNobel Surface Chemistry AB (2010).

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