Document jyrOR0XqpvoyV4BRvKa9w5JdZ

Response Opinion for PFAS Proposal On behalf of Beijing Qingchi Technology Co., Ltd., we would like to exp greetings to the five countries proposing the ECHA and PFAS m control protocol. Our company has always made unremitting efforts to comply with the domestic and international regulations. We support the ambitious attempts of EU reduce the risks caused by toxic and harmful substances, and continue to sincere practical measures to meet the requirements of EU chem including REACH. Beijing Qingchi Technology Co., Ltd. is a company specializing in perfluorosulfonate resin (PFSR) proton exchange membranes. We use PFSR as a solid elec make proton exchange membranes for hydrogen fuel cells an membranes for hydrogen production through water electrolysis in order to achieve the function of blocking the mixing of hydrogen and oxygen and conductin PFSR has a necessary use for this purpose and there is currently no other effe alternative, therefore we apply for an indefinite extension for this application. With this application, PFSR mainly achieves the function of conducting protons and blocking the mixing of hydrogen and oxygen, and maintains chemical and physical stability over a long-term operation under acidic conditions. At present, it can not be replaced by the substitutes existing in the market or mentioned in completely. Please refer to Attachment (1) for relevant data. Beijing Qingchi Technology Co., Ltd August 2023 Attachment 1 Performance of Perfluorinated Sulfonic Acid Resin Proton Exchange Membrane Item Data Testing standards Proton conductivity mS/cm 60 GB/T 20042.3-2022 Ion exchange equivalent g/meq 1009 GB/T 20042.3-2022 Tensile strength MPa 60 GB/T 20042.3-2022 Tensile modulus MPa 300 GB/T 20042.3-2022 Elongation at break % 100 GB/T 20042.3-2022 H y d r o 0.211g GeB/T 2004n2.3-2022 t r a cm3/m2dPa Swelling ratio % 5 GB/T 20042.3-2022