PRODUCTS

SODIUM COCOYL ISETHIONATE (SCI)

Sodium Cocoyl Isethionate (SCI) can be used in Soap bars, Liquid soap bases, Facial cleansers, Body cleansers, Bath Bombs and Shampoos.
Sodium Cocoyl Isethionate (SCI)’s widely used in sulfate-free shampoos, body washes, and cleansing bars as a gentle surfactant that removes impurities without damaging the skin’s natural moisture barrier.

CAS Number: 61789-32-0 / 58969-27-0
EC Number: 263-052-5
Chem/IUPAC Name: Fatty acids, coco, 2-sulfoethyl esters, sodium salts
Molecular Formula: C2Na6O47S20
Molecular weight: 1555.23182 g/mol

SYNONYMS:
2-Hydroxyethanesulfonic Acid Sodium Salt, Isethionic acid sodium salt, Sodium isethionate, COCONUT OIL ACID ESTER OF SODIUM ISETHIONATE, coconutfattyacid, 2-sulfoethylester, sodiumsalt, Fattyacids,coco, 2-sulfoethylesters, sodiumsalts, attyacids, coconutoil, sulfoethylesters, sodiumsalts, Fettsuren, Kokos-, 2-Sulfoethylester, Natriumsalze, IGEPON AC-78, sodiumcocoylisothionate, SCI, SCI 85, Sodium Cocoyl Isethionate, free fatty acid, sodium isethionate, Fatty acids, coco, 2-sulfoethyl esters, sodium salts, coconut fatty acid 2-sulfoethyl ester sodium salt, coconut fatty acid, 2-sulfoethyl ester, sodium salt, fatty acids coco 2-sulfoethyl esters sodium salts, fatty acids coconut oil sulfoethyl esters sodium salts, fatty acids, coco, 2-sulfoethyl esters, sodium salts, fatty acids, coconut oil, sulfoethyl esters, sodium salts, igepon AC-78, jordapon CI, Sodium Cocoyl Ethyl Ester Sulfonate, Fatty Acids, Coconut Oil, Sulfoethyl Esters, Sodium Salts, 2-Hydroxyethanesulfonic acid sodium salt, Ethanesulfonic acid,2-hydroxy-, sodium salt (1:1), Sodium 2-hydroxyethanesulfonate, SODIUM ISETHIONATE, sodium;2-hydroxyethanesulfonate, Coco fatty acid 2-sulfoethyl ester sodium salt, Sodium cocoyl isethionate, Sodium cocoyl isethionate 85%, SCI, Sodium 2-(nonanoyloxy)ethanesulfonate, Igepon A-78

Sodium Cocoyl Isethionate (SCI) is an anionic surfactant that creates a foaming and creamy texture in your solid cleansing product recipes.
Sodium Cocoyl Isethionate (SCI) is derived from the fatty acids of 100% natural coconut oil.
Sodium Cocoyl Isethionate (SCI), of plant origin, softens skin and hair and makes detangling easier.

Available in granular form, Sodium Cocoyl Isethionate (SCI)'s more practical to use than powder due to its volatility.
To use it, mix the Sodium Cocoyl Isethionate (SCI) with a little water and heat the mixture in a double boiler.
Stir until Sodium Cocoyl Isethionate (SCI) forms a paste.

You can then incorporate Sodium Cocoyl Isethionate (SCI) into your recipe for solid shampoo, soap, or other products.
Sodium Cocoyl Isethionate (SCI) is a gentle, high-performance surfactant made from renewable coconut derived fatty acids, prized for its ability to produce a rich, creamy lather while being exceptionally mild on skin and hair.

Sodium Cocoyl Isethionate (SCI) is a mild surfactant derived from Coconut oil.
Sodium Cocoyl Isethionate (SCI) is mild surfactant that provides high foam build up and equal cleansing performance to sulfated surfactants (SLS).

Sodium Cocoyl Isethionate (SCI) enables dense, creamy and stable foams in soft and hard water.
Sodium Cocoyl Isethionate (SCI) enables clear formulation in both water and surfactant solutions.
Sodium Cocoyl Isethionate (SCI) delivers ultra-low residue due to its highly efficient synthesis, giving personal care products superior clarity and foaming.

Sodium Cocoyl Isethionate (SCI) is efficient cleansing while gentle on skin.
Skin humidity: Sodium Cocoyl Isethionate (SCI) exhibits less Transepidermal Water Loss (TEWL) compared to both Magnesium Laureth Sulfate and Sodium Lauryl Sulfate.

Sodium Cocoyl Isethionate (SCI) is excellent dermatological profile, non-irritating on skin, low impact on skin barrier.
Sodium Cocoyl Isethionate (SCI) is extra mild, ideal for baby products and sensitive skin.
Sodium Cocoyl Isethionate (SCI) is readily biodegradable.

Sodium Cocoyl Isethionate (SCI) is EO-free, sulfate-free anionic surfactant.
Sodium Cocoyl Isethionate (SCI) is soluble in water, not oil.
Sodium Cocoyl Isethionate (SCI) is a very mild cleansing and foaming agent (surfactant), derived from the fatty acids of coconut oil, therefore vegetable-based.

Sodium Cocoyl Isethionate (SCI) is a fine white Powder and far superior to the SCI granules, flakes or needles currently available on the market.
Sodium Cocoyl Isethionate (SCI) is naturally derived and biodegradeable while being suitable for Vegans.

Sodium Cocoyl Isethionate (SCI) is a Gentle, Palm-Free Surfactant
Sodium Cocoyl Isethionate (SCI) is a premium surfactant derived from coconut fatty acids, making it completely palm-free and an eco-conscious choice for your formulations.

With its mild cleansing properties and rich foaming capabilities, Sodium Cocoyl Isethionate (SCI) is a versatile ingredient for creating high-performing personal care products.
Sodium Cocoyl Isethionate (SCI) is a very highly active, finely divided, free-flowing powder (sodium cocoyl isethionate) used in syndet bars, combo bars, liquid soaps, facial cleansers, body washes and shampoos.

Sodium Cocoyl Isethionate (SCI) has high foaming power, extreme mildness, and a soft and silky skin feel.
Sodium Cocoyl Isethionate (SCI) foams excellently in even hard water, convinces with its mild scent and is also called baby foam because of its gentleness.

Sodium Cocoyl Isethionate (SCI) is made from natural coconut oil and is completely biodegradable.
Sodium Cocoyl Isethionate (SCI) is recommended for systems where a low percentage of fatty acids is needed, e.g. shampoos, bath and shower gels and liquid soaps.

Sodium Cocoyl Isethionate (SCI) is soluble in some water.
Sodium Cocoyl Isethionate (SCI) is also soluble in surfactants (some formulations may require some heat).
No ethoxylation takes place during the production of Sodium Cocoyl Isethionate (SCI).

Sodium Cocoyl Isethionate (SCI) is a vegetable-derived mild surfactant.
Sodium Cocoyl Isethionate (SCI) is the sodium salt of esterified coconut fatty acid and isethionic acid.

Sodium Cocoyl Isethionate (SCI) is an anionic surfactant derived from the reaction of fatty acids (commonly from coconut oil) with isethionic acid (2-hydroxyethanesulfonic acid) and sodium hydroxide.
Sodium Cocoyl Isethionate (SCI) falls into the class of isethionates (also called acyloxyethanesulfonates) and is valued for being a mild cleansing agent with good foam properties even in hard water.

Commonly known as Baby Foam due to its exceptional mildness, Sodium Cocoyl Isethionate (SCI) Raw Material is a surfactant that is comprised of a type of sulphonic acid called Isethionic Acid as well as the fatty acid – or sodium salt ester – obtained from Coconut Oil.
Sodium Cocoyl Isethionate (SCI) is a traditional substitute for sodium salts that are derived from animals, namely sheep and cattle.

Sodium Cocoyl Isethionate (SCI) is a naturally-derived ingredient that comes from the fatty acids that are present in isethionic acid and coconut oil.
These fatty acids are reacted with sodium isethionate and the mixture is heated to remove any water left behind.

Further, the mixture is distilled to remove excess fatty acids.
In its raw form, Sodium Cocoyl Isethionate (SCI) appears as a fine white powder.
Sodium Cocoyl Isethionate (SCI) is a surfactant based on fatty acids from coconut oil and isoethionic acid, a type of sulfonic acid.

Sodium Cocoyl Isethionate (SCI) is a mild, high foaming anionic surfactant with high purity made from coconut fatty acids.
*Minimum 85% active matter.
*Free fatty acid 14% maximum.

Sodium Cocoyl Isethionate (SCI) has excellent foam density and foam stability.
Sodium Cocoyl Isethionate (SCI) has very good lime soap dispersion and surface activity.
Sodium Cocoyl Isethionate (SCI) leaves no soap scum as it is very hard water-tolerant.

Sodium Cocoyl Isethionate (SCI) is compatible with soaps and anionic, non-ionic, and amphoteric surfactants.
Sodium Cocoyl Isethionate (SCI) is excellentfor lathering; exceptionally mild, it provides a soft skin after-feel.
Sodium Cocoyl Isethionate (SCI) is a natural ingredient that is derived from coconuts, specifically coconut oil and isethionic acid.

Sodium Cocoyl Isethionate (SCI) exhibits high foaming ability, producing a stable, rich and velvety lather, without damaging the moisture barrier or taking stripping away hydration.
A gentle anionic surfactant that does not dehydrate the skin, Sodium Cocoyl Isethionate (SCI) is as a fantastic alternative to harsher, drying anionic surfactants making it great for all skin types, including sensitive or dry skin.

Sodium Cocoyl Isethionate (SCI) makes superior hair shampoo for black hair.
Leave the skin and hair feeling smooth and moisturized without stripping the skin/hair whatsoever.
Sodium Cocoyl Isethionate (SCI) is suitable for sulfate-free cleansing products

Sodium Cocoyl Isethionate (SCI) may contain the following impurities: … sodium chloride (0.8% max.), free fatty matter (10% max.), sodium isethionate (5%), free fatty acid (18%), and sodium soap (3%).”
Assuming 49.87% is the maximum active concentration in a formula, that works out to 59.38% of 84% active Sodium Cocoyl Isethionate (SCI).

I think it’s reasonable to assume the CIR is talking about active Sodium Cocoyl Isethionate (SCI) concentrations since ASM/impurities can vary between brands/manufactures.
Sodium Cocoyl Isethionate (SCI) is a solid, gentle anionic surfactant made from coconut oil.

Sodium Cocoyl Isethionate (SCI) is really versatile and one of my favourite surfactants.
Sodium Cocoyl Isethionate (SCI) is a mild, sulfate-free anionic surfactant.

Derived from the fatty acids of coconut oil and isethionic acid, Sodium Cocoyl Isethionate (SCI) has excellent foaming properties.
Sodium Cocoyl Isethionate (SCI) is found in natural products such as solid shampoos.
Sodium Cocoyl Isethionate (SCI) is produced by ethoxylation, making it an environmentally unfriendly ingredient.

USES and APPLICATIONS of SODIUM COCOYL ISETHIONATE (SCI):
Sodium Cocoyl Isethionate (SCI) is primarily used to create solid cleansers like shampoo bars, but can also be used to make opaque liquid cleansers.
Sodium Cocoyl Isethionate (SCI) acts as a mild anionic surfactant.

Sodium Cocoyl Isethionate (SCI) offers conditioning and reduces greasiness.
Sodium Cocoyl Isethionate (SCI) provides rich, creamy foam to cleansing formulations with minimal impact on skin barriers to keep skin and scalp looking healthy and conditioned.

Sodium Cocoyl Isethionate (SCI) is used in personal cleansing, bath & shower products like bar and liquid soaps.
Sodium Cocoyl Isethionate (SCI) is widely used in cosmetics and personal care products: cleansers, shampoos, bar soaps, facial cleansers, body washes — particularly in formulations where mildness is desired (for sensitive skin, baby care).

As a surfactant, Sodium Cocoyl Isethionate (SCI) helps in removing oil and dirt while being less irritating than harsher detergents (e.g., sodium lauryl sulfate).
Because of its mildness and foam quality, Sodium Cocoyl Isethionate (SCI) is often used in “syndet” (synthetic detergent) bars and solid cleansing bars.

Widely loved in solid shampoo bars, facial cleansers, body washes, and syndet bars, Sodium Cocoyl Isethionate (SCI) is valued for its ability to cleanse effectively without stripping away moisture, leaving behind a smooth, conditioned finish.
Sodium Cocoyl Isethionate (SCI)'s fine powder form makes it versatile and easy to incorporate into a variety of personal care formulations, providing excellent foaming, creamy texture, and a gentle touch that works beautifully even for sensitive skin.

This makes Sodium Cocoyl Isethionate (SCI) an industry favorite for formulators creating high-performance, sulfate-free products that balance mildness with an indulgent sensory experience.
Sodium Cocoyl Isethionate (SCI) plays a key role in your shampoo and soap recipes, household cleaning products, bath bombs, and more.

Sodium Cocoyl Isethionate (SCI) will leave your skin feeling pleasant without drying it out.
With the right dosage, Sodium Cocoyl Isethionate (SCI) works very gently.
Once incorporated into a formula, Sodium Cocoyl Isethionate (SCI) is safe.

Suggestions for use: Sodium Cocoyl Isethionate (SCI) has high foaming capabilities which will not dry out your skin.
Sodium Cocoyl Isethionate (SCI) is very popular in water free products like solid shampoo bars and solid soap bars.
Sodium Cocoyl Isethionate (SCI) can be used in Shampoos, Bubble Bath products, Bath Bombs, Soap Bars and Body Wash Bases.

Sodium Cocoyl Isethionate (SCI) can be used in Soap bars, Liquid soap bases, Facial cleansers, Body cleansers, Bath Bombs and Shampoos.
Sodium Cocoyl Isethionate (SCI) has high foaming performance, is extremely mild, as well as soft and silky skin after-feel characteristics.
Sodium Cocoyl Isethionate (SCI) is much easier to use compared to SCI granules, flakes or noodles options which have to be ground down before use.

Sodium Cocoyl Isethionate (SCI)’s widely used in sulfate-free shampoos, body washes, and cleansing bars as a gentle surfactant that removes impurities without damaging the skin’s natural moisture barrier.
To incorporate Sodium Cocoyl Isethionate (SCI) into a formulation, it is recommended that the chips be crushed prior to melting, as this helps to increase their melting rate.

Next, Sodium Cocoyl Isethionate (SCI) must be heated slowly on low heat in order to allow for easy mixing with other surfactants.
Sodium Cocoyl Isethionate (SCI) is recommended that the surfactant phase be mixed using a high shear stick blender.

This approach helps to prevent the excess foaming that could potentially occur if the stick blender is used to mix all ingredients together at once.
Finally, Sodium Cocoyl Isethionate (SCI) mixture can be added to the rest of the formulation.
Sodium Cocoyl Isethionate (SCI) can be used in clear/pearlescent gels.

-Sodium Cocoyl Isethionate (SCI) in Shampoo:
Sodium Cocoyl Isethionate (SCI) is one of the best sulfate-free surfactants for haircare, providing effective cleansing without stripping the scalp.
Perfect for daily shampoos or formulas for sensitive scalps.
Typical usage rate of Sodium Cocoyl Isethionate (SCI) is 3–15%

-Solid Shampoo & Cleansing Bars use of Sodium Cocoyl Isethionate (SCI):
Sodium Cocoyl Isethionate (SCI) forms the foundation of syndet bars (synthetic detergent bars), adding hardness, rich foam, and mild cleansing.
Sodium Cocoyl Isethionate (SCI) helps create a long-lasting bar that rinses cleanly.
Usage rate of Sodium Cocoyl Isethionate (SCI) is 20–60%

-Facial Cleansers use of Sodium Cocoyl Isethionate (SCI):
Sodium Cocoyl Isethionate (SCI) for skin is ideal in gentle facial cleansers.
Sodium Cocoyl Isethionate (SCI) removes makeup and dirt without irritation, making it great for sensitive or acne-prone skin.
Usage rate of Sodium Cocoyl Isethionate (SCI) is 3–10%

-Body Washes & Shower Gels use ofSodium Cocoyl Isethionate (SCI):
Sodium Cocoyl Isethionate (SCI) produces a creamy, moisturizing foam and prevents dryness, leaving skin smooth after every wash.
Usage rate of Sodium Cocoyl Isethionate (SCI) is 5–20%

KEY BENEFITS of SODIUM COCOYL ISETHIONATE (SCI):
*Mild and Skin-Friendly
Sodium Cocoyl Isethionate (SCI) is known as one of the gentlest surfactants available.
Ideal for sensitive skin, baby care, and facial cleansers, Sodium Cocoyl Isethionate (SCI) cleans effectively without stripping natural oils or causing irritation.

*Luxurious Foam
Despite being sulfate-free, Sodium Cocoyl Isethionate (SCI) produces a rich, creamy lather, enhancing the sensory appeal of shampoos and cleansers.
Sodium Cocoyl Isethionate (SCI) is the go-to ingredient when you want sulfate-free foam that feels professional and indulgent.

*Moisturizing Properties
Unlike harsher cleansers, Sodium Cocoyl Isethionate (SCI) leaves the skin and hair feeling soft and hydrated, not dry or tight.
It’s particularly beneficial in dry or eczema-prone skin formulations.

*Eco-Friendly & Biodegradable
Made from renewable coconut oil, Sodium Cocoyl Isethionate (SCI) is fully biodegradable, making it an ideal ingredient for eco-conscious brands focused on sustainability.

*Formulation Versatility
Sodium Cocoyl Isethionate (SCI) works well with emollients, humectants, oils, and conditioning agents, offering formulators the flexibility to design a range of products — from facial cleansers to solid shampoo bars.

HOW DOES SODIUM COCOYL ISETHIONATE (SCI) COMPARE TO OTHER SURFACTANTS?
*Sodium Cocoyl Isethionate (SCI) vs. SLS (Sodium Lauryl Sulfate)
Sodium Cocoyl Isethionate (SCI): Mild, non-stripping, and moisturizing.
SLS: Stronger, can cause dryness and irritation.
Sodium Cocoyl Isethionate (SCI) is the preferred sulfate-free alternative for sensitive skin.

*Sodium Cocoyl Isethionate (SCI) vs. Sodium Lauroyl Methyl Isethionate (SLMI)
Both are sulfate-free surfactants.
SLMI is slightly milder but produces less lather.
Sodium Cocoyl Isethionate (SCI) offers creamier foam and is easier to source.

*Sodium Cocoyl Isethionate (SCI) vs. Decyl Glucoside
Decyl Glucoside is ultra-gentle but lacks foam density.
Sodium Cocoyl Isethionate (SCI) provides richer lather and a smoother feel.
For luxurious cleansing, Sodium Cocoyl Isethionate (SCI) is superior.

USAGE RATE of SODIUM COCOYL ISETHIONATE (SCI):
The CIR has concluded that Sodium Cocoyl Isethionate (SCI) is “safe for use in cosmetic formulations at 50% in rinse-off products and at 17% in leave-on products”.
(source)
The specific wording regarding what the CIR looked at is: “The greatest concentration of Sodium Cocoyl Isethionate (SCI) tested as a rinse-off product was 49.87%.”

WHY DO WE USE SODIUM COCOYL ISETHIONATE (SCI) IN FORMULATIONS?
Sodium Cocoyl Isethionate (SCI) offers beautiful, gentle “lace glove” lather to our products.
Sodium Cocoyl Isethionate (SCI)’s also naturally acidic, so it helps our end products have a skin-friendly pH with less (or no) adjusting.

DO YOU NEED SODIUM COCOYL ISETHIONATE (SCI)?
Sodium Cocoyl Isethionate (SCI) depends on what you want to make!
If you primarily want to make shampoo bars and other solid cleansing bars, I highly recommend Sodium Cocoyl Isethionate (SCI).
If you are more interested in foaming bath products (bath salts, bath bombs, bath truffles, etc.), I’d probably choose Sodium Lauryl
Sulfoacetate (SLSa) over Sodium Cocoyl Isethionate (SCI) as it’s far more water soluble.
If your primary aim to create liquid surfactant products, I’d choose liquid surfactants and/or solid surfactants that are more water soluble (Sodium Coco Sulfate [SCS], Sodium Lauroyl Methyl Isethionate [SLMI], Sodium Lauryl Sulfoacetate [SLSa]) than Sodium Cocoyl Isethionate (SCI) is.

STRENGTHS of SODIUM COCOYL ISETHIONATE (SCI):
Wonderful, gentle lather.

WEAKNESSES of SODIUM COCOYL ISETHIONATE (SCI):
Between its poor water solubility and tendency to hydrolyze (break down) in hydrous (liquid) formulation with a pH below 6, causing formulations to become unstable, SCI is best suited to solid/bar formulations.

ALTERNATIVES & SUBSTITUTIONS of SODIUM COCOYL ISETHIONATE (SCI):
As a bare minimum you’ll need a different solid anionic surfactant.
You’ll also need to watch the active surfactant matter (you may need to use a different quantity of the new surfactant to get the same ASM level in the end product) and the pH of the final product.
Keep in mind that most solid anionic surfactants are not as gentle as Sodium Cocoyl Isethionate (SCI).
Two options to consider would be SLSa and Sodium (C14-16) olefin sulfonate (Bio-Terge AS90).

FUNCTIONS (INCI) of SODIUM COCOYL ISETHIONATE (SCI):
*Cleaning agent:
Sodium Cocoyl Isethionate (SCI) helps maintain a clean surface.

*Hair conditioner:
Sodium Cocoyl Isethionate (SCI) leaves hair easy to comb, supple, soft and shiny and/or gives volume, lightness and shine.

*Surfactant:
Sodium Cocoyl Isethionate (SCI) reduces the surface tension of cosmetics and contributes to the even distribution of the product when used.

SODIUM COCOYL ISETHIONATE (SCI) IS PRESENT IN:
This ingredient is present in 1.14% of cosmetics.
*Solid shampoo (47.62%)
*Solid cleaner (32.05%)
*Solid toothpaste (23.78%)
*Baby shampoo (14.01%)
*Facial cleansing cream (10.92%)

BENEFITS of SODIUM COCOYL ISETHIONATE (SCI):
Sodium Cocoyl Isethionate (SCI) exhibits high foaming ability, producing a stable, rich and velvety lather that does not dehydrate the skin, making it ideal for addition to water-free products as well as skin care, hair care, and bath products.

This high-performance surfactant, Sodium Cocoyl Isethionate (SCI), which is equally effective in both hard and soft water, is a popular choice for addition to liquid shampoos and bar shampoos, liquid soaps and bar soaps, bath butters and bath bombs, and to shower gels, to name a few foaming products.

This lightly-scented and conditioning cleansing agent is gentle enough for use on the delicate skin of babies, making Sodium Cocoyl Isethionate (SCI) an ideal surfactant for makeup as well as personal care products and natural toiletries.

Its emulsifying property, which allows water and oil to mix, makes Sodium Cocoyl Isethionate (SCI) a popular ingredient in soaps and shampoos, as it encourages dirt to attach itself to them, which in turn makes it easier for it to be washed away.
Sodium Cocoyl Isethionate (SCI)'s deluxe foaming capacity and conditioning effects leave the hair and skin feeling hydrated, soft, and silky-smoothe.

BENEFITS / CHARACTERISTICS of SODIUM COCOYL ISETHIONATE (SCI):
*Mildness:
Sodium Cocoyl Isethionate (SCI) is well suited for formulations aimed at sensitive skin; less drying/irritating compared to conventional surfactants.

*Good foam even in hard water:
The isethionate head group provides good performance in presence of multivalent ions (Ca²⁺, Mg²⁺) compared to simple soap.

*Compatible with other surfactants:
Sodium Cocoyl Isethionate (SCI) can be used with non-ionic, amphoteric surfactants to build mild cleanser systems.

*Derived from fatty acids (often coconut oil):
Sodium Cocoyl Isethionate (SCI) allows marketing as “naturally derived” or “plant-based fatty acid” surfactant (depending on certification)

THE ULTIMATE GUIDE TO SODIUM COCOYL ISETHIONATE (SCI): A GENTLE SURFACTANT FOR PERSONAL CARE PRODUCTS
Sodium Cocoyl Isethionate (SCI) is one of the most popular ingredients in modern sulfate-free personal care formulations.
As a mild surfactant derived from coconut oil, Sodium Cocoyl Isethionate (SCI) delivers a luxurious foam and effective cleansing without irritation making it a preferred choice for sensitive-skin and eco-friendly products.
From solid shampoo bars to creamy face washes, Sodium Cocoyl Isethionate (SCI) gives formulators the ability to create rich, soft-lathering cleansers that feel gentle yet effective.

ADDITIONAL NOTES of SODIUM COCOYL ISETHIONATE (SCI):
Because Sodium Cocoyl Isethionate (SCI) is a mixture of fatty acid chain lengths (from coconut oil fatty acids, typically a distribution of C12-C18 chains) the exact molecular weight and chemical formula vary depending on the specific grade/chain-length distribution.
Supplier data may give a generic or average value; the ChemicalBook listing shows a molecular weight ~1555 g·mol⁻¹ (which likely corresponds to a particular mixture or grade)

In suppliers’ specs you will often see “SCI-85” or “SCI-75” indicating percent active or certain grade (e.g., 85% active SCI, rest fatty acid or free acid).
Formulators should ensure they know the grade and adjust formulation accordingly.

WHAT ARE SODIUM COCOYL ISETHIONATE (SCI) FLAKES USED FOR?
Sodium Cocoyl Isethıonate (SCI) is a popular surfactant used in many personal care products such as soap bars, facial cleansers, liquid soaps, shower gels, bath bombs and shampoos.

As Sodium Cocoyl Isethıonate (SCI) has a high foaming ability, it can produce a stable, velvety lather that is suitable for cleansing products which aim to to remove dirt, oil and any build up.
Due to its gentle lather, Sodium Cocoyl Isethıonate (SCI) leaves the skin feeling hydrated and soft without irritation

ORIGIN of SODIUM COCOYL ISETHIONATE (SCI):
Sodium Cocoyl Isethıonate (SCI) is a naturally-derived ingredient that comes from the fatty acids that are present in isethionic acid and coconut oil.
These fatty acids are reacted with sodium isethionate and the mixture is heated to remove any water left behind.
Further, the mixture is distilled to remove excess fatty acids.

WHAT DOES SODIUM COCOYL ISETHIONATE (SCI) DO IN A FORMULATION?
*Cleansing
*Surfactant

SAFETY PROFILE of SODIUM COCOYL ISETHIONATE (SCI):
Sodium Cocoyl Isethıonate (SCI) is safe for use when added under the prescribed concentrations.
Sodium Cocoyl Isethıonate (SCI) is recommended to be used up to the concentrations of 50% in rinse off products and up to 17% for leave on products.

A patch test should be done prior to full usage and should be discontinued in case of any irritation.
Further, Sodium Cocoyl Isethıonate (SCI) is non-comedogenic and does not cause acne breakouts.
Sodium Cocoyl Isethıonate (SCI) is also biodegradable as it is derived from coconuts.

ALTERNATIVES of SODIUM COCOYL ISETHIONATE (SCI):
*SODIUM LAURYL SULFATE

HOW TO WORK WITH SODIUM COCOYL ISETHIONATE (SCI):
If you’re making a solid product you can usually work with the Sodium Cocoyl Isethionate (SCI) as-is, depending on the format.
If you’ve got large flakes and the formulation calls for the powdered version you’ll want to pre-grind it (wear your dust mask!), but the little noodles look really cool in shampoo bars as-is, and the fine powder is very flexible!
If you are making a liquid product with Sodium Cocoyl Isethionate (SCI), it will need to be dissolved in a suitable solvent first.

Sodium Cocoyl Isethionate (SCI) does not dissolve readily into water; I once combined some Sodium Cocoyl Isethionate (SCI) with water in a jar, sealed it, and left it for 6 months.
It never dissolved.

I recommend combining it with the liquid amphoteric surfactant that is likely also present in the formulation and heating the two together in a water bath until you have a uniform paste.
That paste will dissolve into water, though it will not make a clear mixture unless the level of Sodium Cocoyl Isethionate (SCI) is very low.

If you are working with a large amount of this Sodium Cocoyl Isethionate (SCI) + amphoteric surfactant blend you can speed things along by using an immersion blender to get the mixture silky smooth—the low water content means it won’t lather up, but you’ll get a smooth paste very quickly!
You can also speed up the process by running your SCI through a coffee grinder before combining it with the liquid amphoteric surfactant.

Hydrous formulations including Sodium Cocoyl Isethionate (SCI) should have a pH of 6–8 or the Sodium Cocoyl Isethionate (SCI) can hydrolyze.
I have made more acidic formulations including Sodium Cocoyl Isethionate (SCI); with small batches that were finished quickly it can be ok, but I have also experienced a thick sediment accumulating at the bottom of such formulations after a couple months.

STORAGE & SHELF LIFE of SODIUM COCOYL ISETHIONATE (SCI):
Stored somewhere cool, dark, and dry, Sodium Cocoyl Isethionate (SCI) should last for at least two years.
I’ve had some Sodium Cocoyl Isethionate (SCI) for upwards of five years and haven’t noticed any difference in appearance or performance.

TIPS, TRICKS, AND QUIRKS of SODIUM COCOYL ISETHIONATE (SCI):
Sodium Cocoyl Isethionate (SCI) plays a starring role in a couple blended ingredients that are very popular bases in store bought cleansing bars.

WHY SODIUM COCOYL ISETHIONATE (SCI) IS POPULAR IN SULFATE-FREE PRODUCTS
*Consumer Demand for Gentle Cleansers
Consumers now prefer sulfate-free products that don’t strip hair or skin.
Sodium Cocoyl Isethionate (SCI) mild surfactant meets this demand perfectly it’s gentle yet effective.

*Eco-Friendly and Biodegradable
Derived from coconut oil, Sodium Cocoyl Isethionate (SCI) supports sustainable formulation goals.
Sodium Cocoyl Isethionate (SCI) breaks down easily and is safe for water systems.

*Cross-Category Versatility
From solid shampoo bars to facial cleansers, Sodium Cocoyl Isethionate (SCI) fits into nearly any product type, making it one of the most versatile surfactants available to formulators.

WHY CHOOSE SODIUM COCOYL ISETHIONATE (SCI)?
Sodium Cocoyl Isethionate (SCI) is gentle on the skin, making it ideal for shampoos, hand cleansers, body washes, and facial cleansers.
Sodium Cocoyl Isethionate (SCI) also enhances bath bombs with luxurious foam and fizz, creating an indulgent bathing experience.
Being derived from coconut ensures Sodium Cocoyl Isethionate (SCI)’s free from palm-derived ingredients, making it an eco-friendly option.

USAGE RECOMMENDATIONS of SODIUM COCOYL ISETHIONATE (SCI):
Use Sodium Cocoyl Isethionate (SCI) at 5-20% depending on your product type.
For added versatility, Sodium Cocoyl Isethionate (SCI) can be incorporated at a maximum safe usage level of 36%, suitable for a variety of applications.

PHYSICAL and CHEMICAL PROPERTIES of SODIUM COCOYL ISETHIONATE (SCI):
Melting Point: 191-194°C
pH: 6.0-8.0
Solubility: Soluble in water
Molecular Formula: C2Na6O47S20
Molecular weight: 1555.23182
Appearance: White granules
Appearance: White granules
Activity(MW=343): 84.00Min
Free Fatty Acid (MW=213) (%): 3.00-10.00
pH(10% in demin.water): 5.00-6.50
Color(5% inisopropanol/water): 35Max.
Water: 1.50 Max.

INCI: Sodium Cocoyl Isethionate
CAS# 61789-32-0 / 61788-47-4
Physical Form: Solid Powder
Appearance: White to Off-White Powder
Odor: Characteristic
pH (35°C, 10% Solution): 4.0 – 6.0
Active Substance: min. 82%
Free Fatty Acids: max. 13.0%
Solubility: Water
Typical Usage Rates: 3 – 40% depending on formulation

Storage: We suggest storing this product in an airtight container in a cool, dark location.
When stored properly, best used within 2 years from date of purchase.
Appearance: White powder or noodle
INCI Name: Sodium Cocoyl Isethionate
CAS No.: 61789-32-0
Assay: 85%
Grade: Cosmetic grade
Application: Cleaner, emulsifier, surfactant
Appearance: White granules

Solubility: Surfactants & water
Usage rate: 2 - 53%
Charge: Anionic
Active surfactant matter: Approx 84%
pH range: 4.5 – 6.5 (10% Solution)
Vegan: Yes
Palm oil: No
Melting point:80-83 oC
Density:0.77 g/cm3
Appearance: White granules or powder
Activity: ≥84

Free fatty acid: 3.00-10.00
Apha Color(5% in sopropanol/water): ≤35
Water,%: ≤1.5
Colour: White
Odour: Mild Solvent-like odour
pH: 4.5 - 7.5
Melting point: approx 200'C
Boiling point: > 149 °C (1,013hPa)
Free fatty acid: < 13.0 %

CAS Number: 61789-32-0 (commonly cited)
EC / EINECS Number: 263-052-5
Molecular Formula (typical/fatty acid chain example): C₁₄H₂₇NaO₅S (for the lauroyl ester version)
Molecular Weight (approximate): ~330 g·mol⁻¹ (for the C14 chain version)
Appearance: Fine white powder or granules.
Odour: Mild fatty odor (depending on fatty acid chain impurities)
Density: ~1.10 g/cm³ (as a typical supplier value)
Melting point / Softening point: Example value ~ 80-83 °C for one grade (supplier data)

Solubility: Soluble in water to some degree (though solubility varies by chain length; some literature indicates low solubility ~100 ppm at 25 °C for some isethionates)
Chemical / functional properties:
The core chemical structure is an ester of a fatty acid (coco-derived) and isethionic acid sulfonate group: –CO–O–CH₂–CH₂–SO₃⁻ Na⁺.
SCI is an anionic surfactant with good foaming performance and high compatibility with skin; it retains activity even in hard water (thanks to the sulfonate head group)
Stability: Generally stable under normal conditions; some sources note that isethionates may hydrolyze or lose performance outside specific pH ranges (for example long-term stability may be less outside pH ~5-8)

Compound: Sodium Cocoyl Isethionate (SCI)
Synonyms: Coco fatty acid 2-sulfoethyl ester sodium salt, Sodium cocoyl isethionate, Sodium cocoyl isethionate 85%, SCI, Sodium 2-(nonanoyloxy)ethanesulfonate, Igepon A-78
CAS Number: 61789-32-0
EC / EINECS Number: 263-052-5
Typical formula (single chain example): C14H27NaO5S
Typical MW (single chain example): ~330 g·mol⁻¹ (note: actual commercial mixture varies)
Appearance: White powder or granule; mild fatty odor

Density: ~1.10 g/cm³ (supplier typical)
Melting / softening: ~80-83 °C (supplier grade)
Solubility: Water-soluble considerable; though chain-length affects solubility
Function: Mild anionic surfactant, cleansing agent, high foam even in hard water
Applications: Soaps, bar cleansers, liquid cleansers, shampoos, facial cleansers, body washes
Benefits: Mildness, good foam, hard water tolerance, plant-derived fatty acid origin, compatible with other surfactants
Safety / Use: Safe in cosmetics when formulated non-irritating; patch test recommended; avoid dust inhalation; maintain appropriate pH in formulation (ideally 5–8)

FIRST AID MEASURES of SODIUM COCOYL ISETHIONATE (SCI):
-First-aid measures general:
If you feel unwell, seek medical advice.
-First-aid measures after inhalation:
Assure fresh air breathing.
Allow the victim to rest.
-First-aid measures after skin contact:
Wash with plenty of water.
-First-aid measures after eye contact:
Rinse cautiously with water for several minutes.
Remove contact lenses, if present and easy to do.
Continue rinsing.
-First-aid measures after ingestion:
Rinse mouth.

ACCIDENTAL RELEASE MEASURES of SODIUM COCOYL ISETHIONATE (SCI):
-Personal precautions, protective equipment and emergency procedures:
--For non-emergency personnel:
*Protective equipment:
Wear recommended personal protective equipment.
*Emergency procedures:
Ventilate area.
-Environmental precautions:
Prevent entry to sewers and public waters.
-Methods and material for containment and cleaning up:
*Methods for cleaning up:
On land, sweep or shovel into suitable containers.
Collect spillage.

FIRE FIGHTING MEASURES of SODIUM COCOYL ISETHIONATE (SCI):
-Extinguishing media:
*Suitable extinguishing media:
Use CO2.
Dry powder or water mist extinguishers only
-Advice for firefighters:
*Firefighting instructions:
Evacuate area.

EXPOSURE CONTROLS/PERSONAL PROTECTION of SODIUM COCOYL ISETHIONATE (SCI):
-Control parameters:
No additional information available
-Exposure controls:
*Hand protection:
Protective gloves
*Eye protection:
Chemical goggles or safety glasses
*Skin and body protection:
Wear suitable protective clothing
-Other information:
Do not eat, drink or smoke during use.

HANDLING and STORAGE of SODIUM COCOYL ISETHIONATE (SCI):
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Keep only in the original container in a cool, well ventilated place away from:
Keep container closed when not in use.

STABILITY and REACTIVITY of SODIUM COCOYL ISETHIONATE (SCI):
-Reactivity:
No additional information available
-Chemical stability:
Stable under normal conditions