Chromatography Resin and Column Storage: Preserves Protein A, ion-exchange, and affinity media in 20% Ethanol to inhibit growth of Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa.

Membrane and Filter Preservation: Stores hollow-fiber modules, ultrafiltration/diafiltration cassettes, and cartridge filters in 20% Ethanol to maintain wetness and bioburden control.

Single-Use Assembly Sanitization/Hold: Fills and holds tubing sets, manifolds, bags, and connectors with 20% Ethanol to keep systems sanitary prior to use.

Column and System Sanitization: Flushes chromatography systems and fluid paths with 20% Ethanol to reduce microbial load between runs.

Equipment Wet Storage: Interim wet storage of pumps, bioreactor harvest lines, and sensors in 20% Ethanol to prevent microbial contamination.

Sample and Reagent Preservation: Short-term inhibition of microbial growth in aqueous buffers and reagents using 20% Ethanol when compatible with downstream applications.

Cleaning Validation Support: Rinse and hold solution with 20% Ethanol to maintain low bioburden during cleaning workflows.

Environmental Monitoring Tools Storage: Storage of swabs, dip slides, and contact plates in 20% Ethanol (when appropriate) to minimize contamination risk.