（酢酸／コハク酸）ヒドロキシプロピルメチルセルロース

（酢酸／コハク酸）ヒドロキシプロピルメチルセルロース 価格

（酢酸／コハク酸）ヒドロキシプロピルメチルセルロース 化学特性,用途語,生産方法

• 定義

  本品は、酢酸(*)及びコハク酸(*)とヒドロキシプロピルメチルセルロース(*)のエステルである。参照表示名称：酢酸, コハク酸, ヒドロキシプロピルメチルセルロース

• 化粧品の成分用途

  皮膜形成剤

• 化学的特性

  soluble in organic solvents, including acetone, methanol, aqueous ethanol

• 使用

  Hypromellose Acetate Succinate HPMCAS;is a pharmaceutical compound comprising enzalutamide.

• 調製方法

  Hypromellose acetate succinate is produced by the esterification of hypromellose with acetic anhydride and succinic anhydride, in a reaction medium of a carboxylic acid, such as acetic acid, and using an alkali carboxylate, such as sodium acetate, as catalyst. The fibrous reaction product is precipitated out by adding a large volume of water to the reaction medium. Purification is achieved by thorough washing with water. The granular grade of hypromellose acetate succinate that is so obtained can be pulverized to a fine powder if required.

• 応用例（製薬）

  Hypromellose acetate succinate is commonly used in oral pharmaceutical formulations as a film coating, as well as an enteric coating material for tablets or granules. It is a solubility enhancing agent via solid dispersion. Hypromellose acetate succinate is insoluble in gastric fluid but will swell and dissolve rapidly in the upper intestine. For aqueous film-coating purposes, a dispersion of hypromellose acetate succinate fine powder and triethyl citrate (as a plasticizer) in water is commonly utilized. Organic solvents can also be used as vehicles for applying this polymer as a film coating.
  Hypromellose acetate succinate may be used alone or in combination with other soluble or insoluble binders in the preparation of granules with sustained drug-release properties; the release rate is pH-dependent.
  Dispersions of poorly soluble drugs with hypromellose acetate succinate are prepared using techniques such as mechanical grinding, solvent evaporation, and melt extrusion.

• 安全性

  The safety and pharmacological profiles of hypromellose acetate succinate are similar to those of other ether and ester derivatives of cellulose. All nonclinical studies reported in the literature identify no target organs for toxicity by hypromellose acetate succinate. It has also been reported that hypromellose acetate succinate does not alter fertility in rats, does not produce any developmental anomalies in rats and rabbits, and does not alter perinatal and postnatal development in rats when assessed up to 2500 mg/kg body-weight

• 貯蔵

  Hypromellose acetate succinate should be stored in a well-closed container, in a cool, dry place. In such storage conditions, hypromellose acetate succinate is a stable material. Hypromellose acetate succinate is hygroscopic. It is hydrolyzed to acetic acid and succinic acid, and the hypromellose polymer starts to form if dissolved in 1 mol/L sodium hydroxide for more than two hours. The hydrolysis is the main degradation pathway that is responsible for increasing amounts of free acids in storage, especially upon exposure to moisture.

• 不和合性

  Hypromellose acetate succinate is incompatible with strong acids or bases, oxidizing agents, and sustained levels of elevated humidity.

• 規制状況(Regulatory Status)

  Included in the FDA Inactive Ingredients Database for use in oral preparations (capsules, and delayed-action preparations). Hypromellose acetate succinate has been approved for use in commercial pharmaceutical products in the USA and in Japan.

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