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This document is the Intellectual Property of SGS AXYS Analytical Services Ltd. and contains Proprietary and Confidential Business <br />Information. It may not be reproduced or distributed without written permission of the owner. © SGS AXYS Analytical Services Ltd, 2020. <br />SGS AXYS Analytical Services Ltd, 2045 Mills Road W., Sidney, BC, Canada, V8L 5X2. Tel. (250) 655-5800, fax (250) 655-5811. <br />This is not a controlled document; it is subject to change without notification. <br /> <br />SGS AXYS Analytical Services Ltd. <br /> <br />MSU-110 Rev 14, 28-May-2020 Summary of MLA-110 Rev 02 Ver 07 Page 19 of 23 <br />SGS AXYS confidential, not to be distributed without written permission <br />PFAS: Naming Convention and CAS Numbers <br />Abbreviation Name - Acid Form CAS# <br />PFBA Perfluorobutyric acid 375-22-4 <br />PFPeA Perfluoropentanoic acid 2706-90-3 <br />PFHxA Perfluorohexanoic acid 307-24-4 <br />PFHpA Perfluoroheptanoic acid 375-85-9 <br />PFOA Perfluorooctanoic acid 335-67-1 <br />PFNA Perfluorononanoic acid 375-95-1 <br />PFDA Perfluorodecanoic acid 335-76-2 <br />PFUnA Perfluoroundecanoic acid 2058-94-8 <br />PFDoA Perfluorododecanoic acid 307-55-1 <br />PFTrDA Perfluorotridecanoic acid 72629-94-8 <br />PFTeDA Perfluorotetradecanoic acid 376-06-7 <br /> <br />PFBS Perfluorobutanesulfonic acid 375-73-5 <br />PFPeS Perfluoropentanesulfonic acid 2706-91-4 <br />PFHxS Perfluorohexanesulfonic acid 355-46-4 <br />PFHpS Perfluoroheptanesulfonic acid 375-92-8 <br />PFOS Perfluorooctanesulfonic acid 1763-23-1 <br />PFNS Perfluorononanesulfonic acid 68259-12-1 <br />PFDS Perfluorodecanesulfonic acid 335-77-3 <br />PFDoS Perfluorododecanesulfonic acid 79780-39-5 <br /> <br />4:2 FTS 4:2 fluorotelomersulfonic acid 757124-72-4 <br />6:2 FTS 6:2 fluorotelomersulfonic acid 27619-97-2 <br />8:2 FTS 8:2 fluorotelomersulfonic acid 39108-34-4 <br /> <br />N-MeFOSAA N-Methylperfluorooctanesulfonamidoacetic acid 2355-31-9 <br />N-EtFOSAA N-Ethylperfluorooctanesulfonamidoacetic acid 2991-50-6 <br /> <br />HFPO-DA 2,3,3,3-Tetrafluoro-2-(1,1,2,2,3,3,3- <br />heptafluoropropoxy)propanoic acid <br />13252-13-6 <br />ADONA Dodecafluoro-3H-4,8-dioxanonanoic acid 919005-14-4 <br /> <br />9Cl-PF3ONS 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic <br />acid <br />756426-58-1 <br />11Cl-PF3OUdS 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic <br />acid <br /> <br />763051-92-9 <br />www.axysanalytical.com <br />Page 24 of 94