Sucrose distearate is a plant-derived, non-ionic emulsifier and skin-conditioning agent that stabilizes oil-in-water emulsions. It offers a sophisticated skin feel and enhances the skin barrier without the irritation potential of traditional ionic surfactants.
- INCI Name:
- Sucrose Distearate
- Chemical/Scientific Name:
- Sucrose, octadecanoate (2:1); Bis(stearate) de saccharose
- Common Aliases:
- Sugar Distearate, Saccharose Distearate
| Category: | Emulsifiers |
| Source Origin: | Plant-derived (typically from Sucrose and vegetable-sourced Stearic Acid) |
| Comedogenic Rating: | 0-1 |
| Primary Industries: | Cosmetics, Food, Pharmaceuticals |
| Solubility: | Oil-soluble (dispersible in water) |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Barrier Repair: | |
| Irritation Risk: | |
| Formula Stability: |
Primary Benefits:
- Facilitates the blending of oil and water phases into a smooth, homogeneous cream or lotion.
- Acts as a mild emollient that leaves a non-greasy, velvety finish on the skin surface.
- Supports the skin’s natural lipid barrier, reducing transepidermal water loss (TEWL).
- Maintains formula viscosity and prevents phase separation over time.
Potential Risks:
- Generally regarded as non-irritating and safe for sensitive skin types.
- Rare potential for sensitivity in individuals with specific allergies to fatty acid derivatives.
Biological Action & Cosmetic Profile
The molecular architecture of sucrose distearate consists of a Sucrose molecule esterified with two molecules of Stearic Acid. This structure provides a relatively low Hydrophilic-Lipophilic Balance (HLB) value, typically around 3 to 6, depending on the specific grade and purity. Unlike ionic surfactants that can disrupt the stratum corneum’s lipid bilayer, this non-ionic ester integrates seamlessly into cosmetic formulations to provide mildness and high skin compatibility.Emulsification is achieved by the ingredient positioning itself at the oil-water interface, where its fatty acid chains extend into the oil droplets while the sugar head remains in the aqueous phase. This orientation reduces surface tension and prevents droplets from coalescing. In topical applications, the stearic component contributes to its emollient properties. It fills the microscopic gaps between corneocytes, smoothing the skin texture and providing a protective film that mimics natural skin lipids.Formulators often utilize this sugar ester to create “green” or PEG-free emulsions. Because it is biodegradable and derived from renewable resources, it meets the criteria for most clean beauty standards. Its ability to produce liquid crystal structures in emulsions further enhances the stability of active ingredients and provides a prolonged moisturizing effect.
Broader Applications & Origins
While predominantly used in leave-on skincare like facial moisturizers and eye creams, sucrose distearate also appears in color cosmetics and sunscreens to improve pigment dispersion. Its origins are strictly vegetable; the Sucrose is usually obtained from sugar beets or sugar cane, while the Stearic Acid is derived from vegetable oils like palm or coconut. This makes it a preferred choice for vegan and eco-conscious product lines.
Routine Integration
Synergies:
- Glycerin: Works in tandem to enhance the humectant properties of the aqueous phase.
- Cetearyl Alcohol: Often used together to build viscosity and create stable, thick creams.
- Caprylic Capric Triglyceride: Provides a smooth base for the distearate to emulsify, improving spreadability.
- Squalane: Enhances the emollient profile and barrier-repairing functions of the final product.
Conflicts:
- No known significant biochemical conflicts; however, extreme pH levels (very high or very low) can eventually lead to the hydrolysis of the ester bond.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated sucrose esters, including the distearate, and concluded they are safe for use in cosmetics at concentrations typically found in the industry. Clinical studies published in the Journal of Toxicology indicate that these esters are non-sensitizing and do not exhibit significant ocular or dermal irritation. Regulatory bodies like the SCCS (Scientific Committee on Consumer Safety) and CosIng categorize it as a safe skin-conditioning and emulsifying agent. Its long history of use in the food industry as a food additive further reinforces its high safety profile for human topical application.
Is sucrose distearate natural?
Yes, it is considered a naturally derived ingredient. It is synthesized through the esterification of natural sugar and vegetable-derived fatty acids, making it a staple in natural and organic-certified skincare.
Does it cause acne or clogged pores?
Sucrose distearate has a very low comedogenic rating. Because it is a non-ionic emulsifier that mimics skin lipids, it is unlikely to cause breakouts, even in those with oily or acne-prone skin.
Why is it used instead of PEG-based emulsifiers?
It is often chosen as a PEG-free alternative because it is more environmentally friendly and generally milder on the skin. It provides a more “caring” feel and avoids the potential for 1,4-dioxane contamination sometimes associated with ethoxylated ingredients.