www.pall.com/biopharm 47
3. Keep the cassettes in a temperature-controlled room, optimally at a temperature
of 4 to 15 °C.
Alternatively
1. Place the cassettes in a plastic container with an airtight seal.
2. Add storage agent to cover the cassettes completely.
3. Cover and seal the container.
4. Keep the container in a temperature-controlled room, optimally at a temperature
of 4 to 15 °C.
6. Appendix
6.1 Omega Membrane Chemical Compatibility Chart
The chemical compatibility of Omega membrane cassettes can be described in terms of
changes in physical characteristics due to continuous contact with a chemical solution for
several hours. Changes can affect dimensions, hardness, swelling, the integrity of internal seals,
and membrane integrity. Changes can also be described in terms of the functional
characteristics of the membrane (such as water permeability, and retention characteristics).
Table 15 illustrates the compatibility of different Omega membrane cassettes at 20 °C, unless
otherwise noted, with respect to physical characteristics. The table should only be used as a
guide. Cassettes should be tested in the appropriate solvent and product under actual
operating conditions for an appropriate time to determine compatibility for a specific application.
Table 15
Membrane Chemical Compatibility Chart
Reagent Compatible
1
Acetic Acid (5%) •
Alconox
◆
(1%) •
Citric acid (1%) •
Ethanol (70%) •
Formaldehyde (1%) •
Glycerine (50%) •
Guanidine HCl (6 M) •
Hydrochloric acid (0.1 N) •
Hydrogen peroxide (1%) •
Phosphoric acid (0.1 N) •
Sodium dodecyl sulfate (0.01 M) •
Sodium hydroxide (0.5 N @ 50 °C) •
Sodium hypochlorite (0.05%) •
Terg-a-zyme
◆
(1%) •
Triton
◆
X-100 (0.002 M) •
Urea (25%) •
1
Data for cassette membrane and components at 20 °C, 24-hour exposure, unless otherwise noted. There may be
changes in porosity and/or selectivity of membrane.
Pall offers validation services to test compatibility of membranes and cassettes with different
solvents. Contact your local Pall representative for information on Validation Services.
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