USP Class VI is the most stringent biocompatibility standard for plastics and elastomers in medical applications. It includes acute systemic toxicity, intracutaneous reactivity, and implantation tests on animals. Only materials passing 7-day implantation with no adverse reaction qualify. Silicone, certain FKM grades, and medical-grade TPU commonly achieve Class VI certification for cr... https://globalsealstech.com/medical/