National Aeronautics and Space Administration (NASA). This Technical Standard approved by NASA 08.26, 2011. Superseding: NASA-STD-6001 and NASA-STD-(I)-6001B. 108 p. The purpose of this Standard is to establish National Aeronautics and Space Administration (NASA) program requirements for evaluation, testing, and selection of materials to preclude unsafe conditions related to flammability, offgassing, and fluid compatibility. Additional materials performance requirements may be specified in other program or NASA Center-specific documentation.