Product: SODIUM COCOYL ISETHIONATE (SCI POWDER)
Rchem Sodium Cocoyl Isethionate (SCI) is a high-purity, mild anionic surfactant derived from coconut fatty acids and isethionic acid, presented as a white to off-white, free-flowing powder or fine flakes. This premium, soap-free cleanser is renowned for its exceptional mildness, superior skin feel, and excellent foaming properties. Often referred to as “the mildest surfactant available,” it is a cornerstone ingredient in high-quality, natural, and sensitive-skin personal care formulations, including solid shampoo bars, facial cleansers, body washes, and baby products.
Category: powder
Description
Key Features & Benefits:
● Excellent natural thickening agent with high viscosity at low concentrations
● Effective stabilizer for emulsions and suspensions in various formulations
● Clean-label ingredient suitable for organic and natural product formulations
● Improves texture and shelf life in food products
● Enhances viscosity and stability in cosmetic formulations
● Cost-effective alternative to synthetic thickeners and stabilizers
Technical Specifications Table:
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PALM DERIVATIVES STATUS
VEGAN SUITABLE
Chemical Formulae
Frequently Asked Questions:
Why is SCI considered "the mildest surfactant" and how does it compare to SLES?
SCI is widely regarded as one of the mildest anionic surfactants because of its unique molecular structure. Unlike SLES or SLS, which are linear alkyl sulfates, SCI has a bulkier, more complex structure that does not readily penetrate or interact aggressively with skin proteins. In comparative testing (e.g., Zein protein denaturation assays), SCI consistently shows significantly less protein damage and skin irritation than SLES. While SLES has a Zein value of 150-300, SCI typically has a Zein value of 10-30 – up to 10 times milder. SCI is the preferred surfactant for sensitive skin, baby care, and dermatological cleansers.
The chemical composition is identical; only the physical form differs. SCI Powder (our product) has a smaller particle size, which: (1) Dissolves more quickly and uniformly; (2) Blends more easily with other powdered ingredients; (3) Produces smoother solid bars; (4) Is better for dry shampoo and powder cleansers. SCI Flakes have larger particles, which: (1) May require more processing time to melt or dissolve; (2) Can be easier to handle in low-humidity environments. For most applications, powder is preferred for ease of incorporation and faster dissolution. For solid shampoo bars, either can be used, but powder is often preferred.
What is the difference between SCI powder and SCI flakes, and which should I use?
Solid shampoo bars made with SCI are often called "syndet bars" (synthetic detergent bars). A typical process: (1) Combine SCI with other powdered ingredients (e.g., SLSa, corn starch, clays); (2) Slowly add heated liquid ingredients (oils, butters, surfactants) to the powder blend; (3) Mix until a dough-like consistency forms; (4) Press into molds or press into bars; (5) Allow to cool and harden. Unlike traditional soap bars (made with lye), syndet bars have a skin-friendly pH (5.0-6.5) , do not strip natural oils, and leave a silky after-feel. SCI is the primary bar-forming surfactant because it provides structure, mildness, and creamy lather.
How is SCI used to make solid shampoo bars (syndet bars)?
SCI is not readily soluble in cold water. For liquid formulations (shampoos, body washes, facial cleansers): (1) Heat water to 60-75°C (140-167°F) ; (2) Slowly add SCI powder with gentle stirring – it will gradually dissolve; (3) Once fully dissolved, add other ingredients (SLES, CAPB, etc.) and cool while mixing; (4) Be careful not to cool too rapidly, as SCI may recrystallize. In many commercial liquid cleansers, SCI is used as a secondary surfactant (1-5%) rather than the primary surfactant for ease of processing, while in solid bars, it serves as the primary (30-80%).
Is SCI soluble in cold water? How should it be incorporated into liquid formulations?
Handling: SCI is a fine, free-flowing powder that can become airborne. Use appropriate PPE including a dust mask, gloves, and safety goggles. Avoid inhalation – work in a well-ventilated area. Avoid generating dust. In case of skin contact, wash with water; for eye contact, rinse thoroughly. Storage: Store in a cool, dry place in tightly sealed containers. SCI is hygroscopic (absorbs moisture from the air). In high humidity environments, it can absorb moisture, become sticky or clumpy, and may partially dissolve. To prevent this: (1) Keep containers tightly sealed; (2) Use desiccant packs in storage; (3) Only open containers in low-humidity environments; (4) Use promptly after opening. With proper storage, shelf life is 18-24 months. If clumping occurs, the product can often be gently dried and re-ground, though performance may be slightly affected. Always refer to the Safety Data Sheet (SDS) for comprehensive handling, safety, and first-aid information.
