Saikat Saha The end application(s) will dictate those properties that are important (Product Performance Predictors or Critical Quality Attributes). For example, in catalysis the specific surface area may be a vital property. This also may be an important property for moisture uptake. Start with the data sheet (for example attached) and see what the manufacturer has measured or defined.

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Chapter Characterization of Nanomaterials

BTW, the spelling of the material is upper case: Amberlyst™ 15. DuPont is spelled thus. You can correct your typos with the arrow key next to your question. I would advise you to do this to avoid being thought of as a casual or sloppy scientist.