This standard specifies a test method for hydroxypropyl methylcellulose, including parameters such as moisture, ash, chlorides, alkalinity, iron, heavy metals, methoxy content, hydroxypropyl content, viscosity, ph value, solids by volume and density. The standard provides a comprehensive analytical method for hydroxypropyl methylcellulose, ensuring an accurate assessment of its mass and performance. This abstract is for informational purposes only and should be referred to the full standard document for practical application. ASTM does not provide any warranty as to the accuracy and completeness of the contents of the abstract.