Specification: HY-IIA Formulation structure: - [-CH2-CH-]N-COOH Appearance: white loose power, Hygroscopicity,little ordor Acidity: 2.5-3.5 Content  Measurement: 56%-68% Package: 20KG/Carton Character: permanent stability at high Viscosity, Be more suitable for oral pharmaceutical preparations due to residual solvents trace Usage: slow-release material, material of controlled-release drug,oral ,medical use or new delivery system