This standard specifies the terms and definitions, basic requirements, product classification and identification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and service commitments of chlorine-resistant spandex filament. This standard is applicable to the production, inspection, and sales of chlorine-resistant spandex filament with nominal linear density of 15.0 dtex to 311.0 dtex, and the basis for testing and judgment when product quality disputes occur.