RT Journal Article SR Electronic T1 Proceedings of the 2023 Viral Clearance Symposium, Session 6: Viral Inactivation JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 187 OP 195 DO 10.5731/pdajpst.2024.002246 VO 78 IS 2 A1 Ma, Junfen A1 Roush, David YR 2024 UL http://journal.pda.org/content/78/2/187.abstract AB The use of detergents or low pH hold are commonly employed techniques in biologics downstream processing to inactivate enveloped viruses. These approaches have been demonstrated to be robust and are detailed in ASTM E2888 (low pH) and ASTM E3042-16 (Triton X-100), accordingly. One of the recent challenges is the need for a replacement of Triton X-100 with a more environmentally friendly detergent with similar log10 reduction value (LRV) achieved. The presentations in this session focused on a detailed assessment of a range of detergents. The most well characterized and potentially robust detergents identified were TDAO (n-Tetradecyl-N,N-dimethylamine-N-oxide) and Simulsol SL 11 W. Key performance factors assessed (in direct comparison with the industry standard Triton X-100) were viral inactivation kinetics (total elapsed time to achieve equilibrium), LRV achieved of enveloped viruses, toxicity, potential impact on product quality and process performance, clearance of residual detergent in subsequent downstream steps, assays to support assessment with appropriate limit of quantification, and commercial supply of detergent of the appropriate quality standard. Both TDAO and Simulsol SL11 had similar overall LRV as Triton-100. In addition, for the low pH viral inactivation, reduced LRV was observed at pH > 3.70 and low salt concentration (outside of the ASTM range), which is a cautionary note when applying low pH inactivation to labile proteins.