The library

Ingredient library

Every ingredient SkinAtlas knows about — all 2402 of them. What each one does, what it works well with, and what to watch for.

All 2402 ingredients — page 88 of 101

Other
Sodium Metaphosphate

An inorganic phosphate polymer used as a chelating agent and pH adjuster in cosmetics; sequestrates calcium and magnesium ions to improve formula stability and preservative efficacy.

chelatorph-adjusterviscosity-modifier
Chelates calcium and other mineral ions to improve formula stabilityAdjusts pHCan improve skin feel by softening hard-water minerals in rinse-off formulas
Surfactant
Sodium Methyl Cocoyl Taurate

An amino acid-derived anionic surfactant formed from taurine, methyl, and coconut oil fatty acids, used as a gentle cleansing and foaming agent in mild facial and body cleansers.

surfactantcleansingfoaming
Very mild anionic surfactant with excellent skin compatibilitySuitable for sensitive skin and baby care products
Surfactant
Sodium Methyl Oleoyl Taurate

A mild, sulfate-free anionic surfactant derived from taurine and oleic acid, used as a gentle cleansing and foam-boosting agent in facial cleansers.

surfactantcleansingfoam-boosting
Mild, sulfate-free surfactant suitable for sensitive skinDerived from taurine and olive-derived oleic acidBoosts foam and viscosity in cleansing formulas
Surfactant
Sodium Methyl Stearoyl Taurate
SODIUM METHYL STEAROYL TAURATE

A sodium salt of N-methyl-N-stearoyl taurine, used as a mild anionic surfactant and emulsifier in cream formulations. Less irritating than traditional alkyl sulfates.

surfactantemulsifyingskin-conditioning
Gentle anionic surfactant with good mildnessEmulsifying action in creamsGood skin feel
+ Cholesteryl/Behenyl/Octyldodecyl Lauroyl Glutamate+ Behenyl Alcohol
Other
Sodium Methyl Sulfate

A sodium salt used primarily as a counterion or processing-related residual in cosmetic formulations, typically present in trace amounts from manufacturing of quaternary surfactants.

solventprocessing-aid
Used as a processing aid or counterion in cosmetic ingredient synthesis
Trace residual from quaternary compound manufacturing; not a functional ingredient per se
Surfactant
Sodium Myristoyl Glutamate

An amino acid-derived anionic surfactant produced by condensing myristic acid (C14) with glutamic acid, used in gentle cleansers for mild, effective foaming with a favorable skin-compatibility profile.

cleansingfoamingsurfactant
Amino acid-derived surfactant with gentle cleansing actionBiodegradable and skin-compatibleProduces smooth, dense foam
Minimal; similar safety profile to other amino acid surfactants
Surfactant
Sodium Oleate

The sodium salt of oleic acid; functions as an emulsifier and surfactant, often found in soap-based or emulsion formulas.

emulsifiersurfactantcleansing
Helps stabilize oil-in-water emulsionsMild cleansing action
Oleic acid base may be comedogenic for acne-prone skinCan disrupt the moisture barrier with repeated use in cleansers
Humectant
Sodium PCA

A component of the skin's natural moisturizing factor (NMF).

ANTISTATICHAIR CONDITIONINGHUMECTANTSKIN CONDITIONING
HydrationMimics skin's own moisturizers
Surfactant
Sodium Palmitate

The sodium salt of palmitic acid, a saturated fatty acid naturally found in palm oil and animal fats. Acts as a mild soap-type surfactant and cleansing agent, commonly found in bar soaps and powder cleansers. Has emulsifying properties that allow it to lift oils and debris from skin. Can be drying at high concentrations.

surfactantcleansingemulsifying
Mild soap-type cleansing agentHelps emulsify oils and remove impuritiesDerived from naturally occurring palmitic acid
Can be drying with frequent use, especially in high concentrationsMay contribute to pore-clogging in some formulations
Active
Sodium Palmitoyl Proline

An N-acyl amino acid ester formed from palmitic acid and the amino acid proline. Used in prestige anti-aging formulas for its ability to stimulate matrix proteins and help restore the skin's structural integrity. Commonly formulated as a lipid vesicle complex (e.g. with Nymphaea Alba).

anti-agingskin-restructuringskin-conditioning
Stimulates extracellular matrix proteins (fibronectin, tenascin) for firmer-looking skinHelps restore skin structure and elasticity over timeOften paired with Nymphaea Alba Extract as a lipid complex for restructuring
+ Nymphaea Alba Flower Extract+ Adenosine+ Hydrolyzed Hyaluronic Acid
Surfactant
Sodium Palmoyl Glutamate
SODIUM PALMOYL GLUTAMATE

The sodium salt of N-palmitoyl glutamic acid — an amino acid-based emulsifier and surfactant. Derived from palm oil and glutamic acid. Exceptionally gentle and skin-compatible, used in Naturie's milk for its emulsifying and conditioning properties.

emulsifierskin-conditioningsurfactant
Amino acid-based surfactant — very gentle on skinSkin conditioning and softeningImproves emulsion stability
+ Behenyl Alcohol+ Glyceryl Stearate
Other
Sodium Phosphate

The monosodium salt of phosphoric acid (NaH2PO4) used as a pH adjuster and buffering agent in cosmetic and personal care formulations.

ph-adjusterbuffering-agent
Adjusts and stabilizes formula pH in the acidic rangeCommon buffer component in cosmetic formulations
Other
Sodium Phytate

A natural chelating agent derived from rice bran or corn that stabilizes formulas by sequestering trace metals and boosting preservative performance.

chelatorpreservative-booster
Binds trace metal ions (iron, copper, calcium) to prevent oxidation and formula degradationBoosts preservative efficacy by making the environment hostile to microbesBiodegradable alternative to synthetic EDTA
Other
Sodium Polyacrylate

A superabsorbent sodium salt of polyacrylic acid used as a thickener and emulsion stabilizer in serums, essences, and gel-cream formulas.

thickenerfilm-formeremulsion-stabilizer
Thickens and stabilizes gels and emulsionsCreates a smooth, cushiony texture
Other
Sodium Polyacrylate Starch

A starch-grafted sodium polyacrylate copolymer used as a thickener, texturizer, and oil-absorbing agent in creams and sunscreens.

thickenertexturizer
Absorbs oil and moisture to give a silky, mattifying finishThickens and stabilizes emulsionsImproves spreadability and skin-feel of sunscreens and moisturizers
Other
Sodium Polyacryloyldimethyl Taurate

A synthetic polymer that thickens and stabilizes emulsions for a smooth, cushiony texture.

thickeneremulsion-stabilizer
Improves texture and stability
Humectant
Sodium Polyaspartate

A biodegradable polyamino acid polymer (poly-aspartic acid sodium salt) used as a high-performance humectant and film-former that provides sustained surface hydration.

humectantfilm-former
Binds water to the skin surface for lasting hydrationForms a moisture-retaining film on skinBiodegradable alternative to polyacrylates
Humectant
Sodium Polyglutamate

A fermentation-derived polymer (from natto) that binds water and forms a light moisturizing film, often described as more hydrating than hyaluronic acid by weight.

humectantfilm-forming
Strong humectant hydrationSmooth, soft film on skin
Low risk
+ Sodium Hyaluronate+ Glycerin
Surfactant
Sodium Polystyrene Sulfonate

A synthetic polymer used as a film former and emulsion stabilizer that leaves a temporary tightening, smoothing film on skin.

film-formingemulsion-stabilizingviscosity-controlling
Forms a flexible film that can temporarily smooth the look of fine linesStabilizes emulsion texture
Other
Sodium RNA

The sodium salt of ribonucleic acid (RNA), used as a skin-conditioning agent that improves the feel and suppleness of skin in cosmetic formulations.

skin-conditioning
Skin conditioning; leaves skin softer and smootherNon-comedogenic
Other
Sodium Saccharin

The sodium salt of saccharin, a synthetic sweetener used in cosmetics (lip balms, oral care) to mask taste.

flavoringmasking
Masks bitter or unpleasant taste in lip and oral-adjacent products
Exfoliant
Sodium Salicylate

A sodium salt of salicylic acid used as a milder BHA exfoliant, preservative, and pH adjuster in cosmetic formulations, offering gentler exfoliation suitable for sensitive skin types.

exfoliantpreservativepH adjuster
Provides BHA exfoliation for smoother skin textureAntimicrobial preservative propertiesMilder than salicylic acid, suitable for sensitive skin
May cause irritation in hypersensitive individuals or when used with multiple BHAsEWG does not verify products containing this ingredient
Other
Sodium Starch Octenylsuccinate

A modified starch ester used as an oil-absorbing texturizer and emulsion stabilizer in primers and color cosmetics.

absorbentemulsion-stabilizertexture-enhancer
Absorbs oil for a matte finishStabilizes emulsions and improves texture
Surfactant
Sodium Stearate

The sodium salt of stearic acid, used as an emulsifier, surfactant, and opacifying agent in cleansing and moisturizing formulas.

emulsifiersurfactantopacifier
Anionic emulsifier and cleansing agent derived from stearic acidHelps thicken and stabilize creams and cleansing barsContributes an opacifying effect to formulas