Pregelatinized Starch

Product Details

CasNo： 9005-25-8

MF： (C6​H10​O5​)n

Appearance： powder

Delivery Time： 15 days

Packing： 25kg/bag

Purity： 99%

• Basic Information
  • Chemical Formula: (C6​H10​O5​)n​, where n=300−1000.
  • CAS Registry Number: 9005 - 25 - 8.
  • Properties: It is a white or off - white powder, ranging from moderately coarse to fine. It is odorless and has a slightly special taste.
• Physical and Chemical Properties
  • Acidity and Alkalinity: The pH value is 4.5 - 7.0 (10% aqueous solution).
  • Bulk Density: 0.586 g/cm³.
  • True Density: 1.516 g/cm³.
  • Fluidity: 18% - 23% (Carr compressibility index).
  • Solubility: Insoluble in organic solvents, and slightly soluble or soluble in cold water depending on the degree of gelatinization. Part of the pre - gelatinized starch is 10% - 20% soluble in cold water.
  • Stability: Stable but prone to moisture absorption. It should be stored in a sealed container in a cool and dry place.
• Preparation Methods
  • Drum Method: The starch emulsion is fed between or onto the surface of drums heated to about 150°C. The emulsion is gelatinized and dried into a film on the drum surface, and then scraped off by a scraper and crushed to obtain the product.
  • Spray Method: The starch milk is gelatinized with high - pressure steam and then spray - dried quickly to produce pre - gelatinized starch. This method has a high cost, and it is not suitable for high - viscosity pastes.
  • Extrusion Method: The wet starch with a water content of 15% - 20% is added to the extrusion puffing machine. It is gelatinized by the frictional extrusion of the screw shaft, and then extruded under high pressure, expanded and dried. Finally, it is crushed and screened to obtain the product. This method is more economical, and the product has a high solubility.
• Product Characteristics
  • Good Gelation and Molding Properties: It can form a starch paste with a certain viscosity in cold water, with strong gelation and good molding properties, which helps the product maintain a specific shape.
  • Excellent Emulsifying Performance: It can keep the oil - water system stable and can be used as an emulsification adjuvant.
  • Strong Adaptability: It has good water - solubility, thickening property, and suspensibility, and is resistant to high temperature, acid, alkali, mechanical processing, and shearing force. It also has good freeze - thaw stability and can be used under a variety of complex conditions.
  • Obvious Texture Effect: The product has good dispersibility, a fine taste, a large absorption capacity, and good film - forming properties, which can improve the texture of the product.
• Main Applications
  • Pharmaceutical Field: It is commonly used as a binder, diluent, and disintegrant for oral tablets and capsules, and can also be used to prepare drug - sustained - release agents, which can improve the bioavailability and stability of drugs. In addition, pre - gelatinized starch has self - lubricating properties, and magnesium stearate needs to be added as a lubricant when used in combination with other excipients.
  • Food Industry: It can be used as a thickener in jams, salad dressings, ice creams, etc. to increase the viscosity of food and prevent layering; as a stabilizer to maintain the internal structure of frozen food; as a binder to assist the combination of components in dehydrated soup materials and seasonings.
  • Other Fields: It is used as a sizing agent in the textile industry, a water - based coating in the construction industry, a sand - mold binder in metal casting, and can also be used as a raw material for further modification to prepare starch graft copolymers, etc.
• Safety: It is non - toxic and non - irritating, but oral administration in large quantities is harmful. During operation, eyes should be protected, and a dust - proof mask should be worn. Excessive dust should be avoided to prevent explosion risks.