Name: China Manufacturer Supply High Purity SODIUM STYRENE/ACRYLATES COPOLYMER CAS 9010-92-8
Brand: Wuhan Fortuna Chemical Co., Ltd.

Items	Specifications	Results
Appearance	White emulsion	Conform
Odor	Typical	Conform
pH(10% aq.)	1.5-5.0	3.01
Solid content (%)	40.0±2.0	40.7
Germs (CFU/ ml )	MAX 100	0
Yeast & Mould (CFU/ ml )	MAX 100	0
Conclusion	The product conforms to the above specifications.

Sodium Styrene/Acrylates Copolymer is a synthetic polymer used primarily in cosmetics and personal care products. It is created through the copolymerization of styrene and one or more acrylate monomers (like acrylic acid or its esters), which are then neutralized with sodium hydroxide. This results in a white, fine powder or dispersion that functions as a versatile film-forming agent, texture enhancer, and stabilizer.

Key Properties

Film-Forming: Creates a flexible, water-resistant film on hair or skin.
Stabilizer & Thickener: Helps stabilize emulsions (oil-water mixtures) and can thicken formulations.
Texture Modifier: Imparts a smooth, silky feel to products.
Water Resistance: Provides resistance to humidity and water wash-off.
Opacity & Bulking Agent: Adds body and opacity to products.

Primary Uses & Applications

1. Cosmetics & Personal Care (Most Common)

It is a workhorse ingredient in many products due to its multifunctional nature:

Hair Care:

Hairsprays, mousses, gels: Provides hold, stiffness, and humidity resistance by forming a flexible film on hair strands.
Shampoos & conditioners: Adds body and thickness, improves texture.

Makeup:

Mascara, eyeliners: Enhances waterproofing, prevents smudging, and improves application.
Foundations, BB creams: Helps create a smooth, even film on the skin, improving wear and water resistance.
Powders, compacts: Acts as a binder to press powders and can improve slip.

Skincare:

Sunscreens: Helps form an even, water-resistant film to improve SPF efficacy.
Moisturizers & lotions: Stabilizes the formula and enhances skin feel.

2. Non-Cosmetic Applications

While less common, its properties are utilized in:

Coatings & Paints: As a film-forming agent and binder.
Textiles: For fabric coatings and finishes.
Industrial Adhesives: As a component in adhesive formulations.

Why is it Used? Benefits for Formulations

Improves Performance: Enhances longevity and water resistance of makeup and hair styles.
Creates Desired Texture: Delivers smooth, non-sticky, silky feel that consumers enjoy.
Stabilizes Products: Helps prevent ingredients from separating, extending shelf life.
Versatile & Effective: Performs well at low concentrations, making it cost-effective.

Safety & Considerations

Regulatory Status: Generally recognized as safe for use in cosmetics by expert panels (e.g., CIR - Cosmetic Ingredient Review). It is approved for use in many countries, including the US, EU, Canada, and Japan.
Skin Sensitivity: It is considered a low-risk ingredient for most people. However, as with any polymer:

It can potentially cause mild irritation if it gets into the eyes.
Some individuals with very sensitive skin may find it drying or slightly irritating, especially in leave-on products.
It is non-comedogenic (does not clog pores).

Environmental Note: As a synthetic polymer, its environmental biodegradability is low. However, in cosmetic wash-off products, it is typically used in very small amounts (<5% concentration).

How to Identify It on Labels

It is listed by its International Nomenclature of Cosmetic Ingredients (INCI) name: "SODIUM STYRENE/ACRYLATES COPOLYMER".
Often found in the middle of the ingredient list, indicating a moderate concentration.

In summary, Sodium Styrene/Acrylates Copolymer is a common, versatile synthetic polymer that acts as a film-former and texture enhancer, crucial for the performance and feel of many long-wearing, water-resistant cosmetics and hair care products.