Several organizations are involved in setting chemical composition standards for nanomaterials: 1. International Organization for Standardization (ISO): Develops international standards, including those for nanotechnology. 2. American Society for Testing and Materials (ASTM): Creates standards for a wide range of materials, including nanomaterials. 3. National Institute of Standards and Technology (NIST): Provides reference materials and measurement standards. 4. European Committee for Standardization (CEN): Develops European standards for nanomaterials.
