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Nothing ruins a scoop of ice cream on a hot summer day quite like biting into an icy crunch. That rough, gritty texture destroys what should be a smooth, indulgent experience. Why are some ice creams silky and creamy while others are riddled with ice crystals? The answer often lies in a humble ingredient on the label — Sodium Carboxymethyl Cellulose (CMC) .

Sodium Carboxymethyl Cellulose (CMC) is a food additive derived from natural cellulose. It appears as a white or off-white powder, almost odorless and tasteless. Widely used as a thickener, stabilizer, and emulsifier, it’s often called the “invisible skeleton” of the food industry. You’ll find it in ice cream, yogurt, beverages, jams, and more.

2.1 Prevents Ice Crystal Growth – No More Icy Grit
During the freezing process, water molecules gradually aggregate into ice crystals. Without effective control, these crystals grow larger, eventually becoming the gritty ice particles we dislike. CMC adsorbs onto the surface of ice crystals, preventing water molecules from continuing to arrange and grow on the crystal surface, keeping crystals small and uniform. The result is a fine, smooth texture with no rough icy bits.

2.2 Increases Viscosity – Stabilizes Product Structure
CMC is an effective thickener that significantly increases the viscosity of ice cream mix. Higher viscosity slows down moisture migration within the product, reducing texture changes caused by evaporation and recrystallization. This also means the ice cream is less likely to melt and deform during storage and transport.

2.3 Improves Mouthfeel and Flavor Release
CMC makes the ice cream structure more refined and uniform. When eaten, the ice cream melts more smoothly in the mouth, fully contacting taste buds and more effectively releasing creamy and other flavors. CMC also gives ice cream a rich, velvety mouthfeel, making every bite more satisfying.

2.4 Prevents Fat Separation and Protein Precipitation
Ice cream is a complex multi-phase system — fat, protein, water, and air bubbles all coexist. CMC interacts with fat particles and protein molecules to form a stable network structure, evenly dispersing all components throughout the system. This prevents fat from floating to the surface and protein from precipitating and clumping, ensuring consistent texture from the first spoonful to the last.

The recommended dosage of CMC in ice cream is generally 0.1% – 0.5% . Different studies suggest slightly different optimal levels — some recommend 0.1%, while others suggest around 0.5% works best. The exact amount depends on the specific formulation and production process.

• Better texture: Creamy and smooth, with no icy grit

• Improved melt resistance: Doesn’t melt too quickly

• Attractive appearance: Holds its shape well

• Longer-lasting flavor: Even release of flavors, rich and creamy

• Better cost control: May reduce the amount of solid ingredients needed

SIDLEYCHEM supplies high-quality food grade Sodium Carboxymethyl Cellulose (CMC) products with high degree of substitution, excellent solubility, and stable thickening performance, suitable for ice cream, yogurt, beverages, sauces, and various food systems. We offer customized viscosity grades and technical support based on customer formulation needs, helping create higher-quality food experiences.

SIDLEYCHEM supplies high-quality food grade Sodium Carboxymethyl Cellulose (CMC) products with high degree of substitution, excellent solubility, and stable thickening performance, suitable for ice cream, yogurt, beverages, sauces, and various food systems. We offer customized viscosity grades and technical support based on customer formulation needs, helping create higher-quality food experiences.