Medical device OEMs face increasing scrutiny over material compliance — and justifiably so. Silicone components used in patient contact, drug delivery, or fluid handling carry regulatory obligations that can halt product launches if not addressed early. This guide explains the key standards and how Blue Diamond’s platinum-cured LSR platform meets them.
FDA 21 CFR 177.2600
FDA 21 CFR Part 177.2600 defines rubber articles intended for repeated use in contact with food, pharmaceuticals, or human tissue. Key restrictions include: no sulfur-based vulcanizing agents, no N-nitrosamine-generating accelerators, and extractable heavy metal limits. Platinum-cured silicone inherently satisfies these by using a Pt catalyst with no sulfur or metal accelerators.
USP Class VI Biological Testing
USP <88> Class VI is a comprehensive biological reactivity evaluation consisting of systemic injection, intracutaneous, and implantation tests in vivo. It is the most stringent of the USP classifications. Class VI certification is required for components in direct contact with patient blood, lymphatic fluid, or implanted tissue.
ISO 10993 Biocompatibility
ISO 10993 is the international framework for biological evaluation of medical devices. Key tests include: cytotoxicity (10993-5), sensitization (10993-10), genotoxicity (10993-3), and pyrogenicity. Blue Diamond conducts ISO 10993-5 testing on all medical LSR grades as standard; full 10993 package available on request.
Platinum vs Peroxide Cure
Peroxide-cured silicone leaves volatile by-products (methyl acetate, acetone) that must be post-cured at 200°C/4h — adding time and cost. Platinum (addition) cure produces no by-products, achieves tighter dimensional tolerances through lower volumetric shrinkage, and is mandatory for USP Class VI and FDA food-grade compliance.
