Physical and Chemical Characteristics of Preparation

The physical and chemical characteristics of preparations via parameters (e.g., explosive properties, oxidizing properties, flashpoint and other indications of flammability, acidity/alkalinity and pH, surface tension, density, wettability, suspensi-bility, dilution stability, dry and wet sieve test, particle size distribution and other properties of the formulation) and the corresponding methods have to be determined and reported in detail [46]. 

Specific new tests on viscosity and surface tension are guided by the Commission Directive 98/98/EC of 15 December 1998. 

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The physical and chemical characteristics of prepared HY and KY zeolite were analyzed by AAS and BET surface area measurements. These results are summarized in Table 1 and show that they are highly crystalline and free from impurities. 

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