Often misunderstood as surface hardness, the tablet hardness test<\/strong> in USP standard actually refers to the breaking force<\/strong>\u2014the pressure needed to cause the tablet to fracture. This is a key indicator of tensile strength and compression integrity. The test is typically conducted using automated testers like the MPT-02 Tablet Hardness Tester<\/strong><\/a> from Cell Instruments, which ensures consistent loading rates and precise force application.<\/p>\n\n\n\n The compression test<\/strong> involves diametrical loading of tablets, especially round tablets. The force is applied between two platens until the tablet breaks. For special shapes or scored tablets, alternative methods such as three-point bending tests<\/strong> are recommended. The rate of loading<\/strong>, platen parallelism, and calibration precision directly affect test reliability.<\/p>\n\n\n\n While USP <1217> emphasizes breaking force, friability testing is covered under USP <1216> . This test simulates tablet tumbling in a rotating drum to determine brittleness<\/strong> and abrasion resistance<\/strong>. Weight loss after tumbling quantifies friability. An acceptable weight loss is typically \u22641%. This test complements the hardness test by revealing how tablets hold up under dynamic mechanical stress.<\/p>\n\n\n\nCompression Test<\/h3>\n\n\n\n
Friability Test (as per USP )<\/h3>\n\n\n\n