Propyleneglycol Alginate (PGA) with CAS number 9005 - 37 - 2 is a high - quality product. It is an ester of alginic acid, which is derived from brown seaweed. PGA is a white to yellowish powder, odorless or with a faint characteristic odor, and is soluble in water to form a viscous solution.
The molecular structure of PGA contains propylene glycol groups attached to the alginate backbone. The degree of substitution of propylene glycol groups can vary, which affects its physical and chemical properties. In general, a higher degree of substitution leads to better solubility and stability in acidic conditions. The typical moisture content of PGA is less than 15%, and the ash content is usually below 3%.
Propyleneglycol Alginate has a wide range of applications in various industries:
Food Industry: It is widely used as a thickener, stabilizer, and emulsifier in food products. In dairy products such as yogurt and ice cream, PGA helps to prevent whey separation, improve texture, and enhance the stability of the final product. In salad dressings, it acts as an emulsifier to keep oil and water phases from separating, ensuring a homogeneous and stable product.
Beverage Industry: PGA can be used in fruit juices and soft drinks to prevent sedimentation of pulp and improve the clarity and stability of the beverage. It also provides a smooth mouthfeel, enhancing the overall sensory experience of the drink.
Pharmaceutical Industry: As a pharmaceutical excipient, PGA can be used in tablets and capsules as a binder, disintegrant, or stabilizer. It can also be used in topical formulations such as creams and ointments to improve the consistency and stability of the product.
Dissolving: When using PGA, it is recommended to disperse it in cold or warm water first. Stir continuously to ensure uniform dispersion. Heating the solution slightly can accelerate the dissolution process, but the temperature should not exceed 80°C to avoid degradation of the product.
Mixing with Other Ingredients: After dissolving, PGA can be mixed with other ingredients in the formulation. It is important to add it at the appropriate stage of the production process to ensure optimal performance. For example, in food production, it is usually added before the homogenization step.
Adjusting Dosage: The dosage of PGA depends on the specific application and the desired effect. In general, the dosage ranges from 0.1% to 1% in food products. However, it is necessary to conduct preliminary tests to determine the most suitable dosage.
Yogurt Production: A yogurt manufacturer was experiencing problems with whey separation in their products. They added 0.3% Propyleneglycol Alginate to their yogurt formula. After homogenization and fermentation, the yogurt showed significantly reduced whey separation. The texture became smoother and creamier, and the overall quality of the yogurt was improved. The product had a longer shelf - life, and customer satisfaction increased.
Salad Dressing Production: A salad dressing company was struggling with the instability of their oil - in - water emulsions. They incorporated 0.5% PGA into their formula. The result was a stable emulsion that did not separate even after long - term storage. The dressing had a better mouthfeel and a more homogeneous appearance, which enhanced its market competitiveness.
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