Decontaminating And Sanitizing - Thermo Scientific CryoExtra CE8100 Series Operating And Maintenance Manual

Decontaminating and Sanitizing

CryoExtra Freezers are constructed from Stainless Steel
sheets. Any cleaning solution which does don't react with
Aluminum and Stainless Steel can be used in these freezers.
Any cleaning solution that does not react with aluminum or
stainless can be used in the sanitation process of these
dewars. In most cases, any household detergent or mild soap
solution is suitable. The U.S. Custom Service uses a solution
called EXPOR for incoming shipments from abroad. This is
mixed 9 parts water mixed with sodium chloride & lactic acid.
As mentioned above, however, any household cleaning
solution can be used. These include bleach, detergents and
mild soaps. Other cleaners and disinfectants that can be
safely used include hydrogen peroxide, chlorine / water and
denatured alcohol. NOTE: DO NOT USE ANY PETROLEUM
BASED CLEANING SOLUTION. It is important that the inner
vessel is thoroughly rinsed with water and all cleaner residues
have been removed. Spraying the solution into the inner
vessel is preferred, although agitation of the solution inside
the inner will suffice.
The generally accepted practice of using 10% chlorine bleach
with 90% water solution still holds as the best method for
decontamination. However, with some of the bovine and
swine virus strains showing up today, it is the conclusion of
the agricultural professors at the University of Minnesota and
Texas A & M that an increased mixture of chlorine bleach to
30% and 70% water will kill all known viruses except BSE.
This is still unknown to them and are not willing to offer a
solution.
To perform this sanitizing procedure, cover all inner surfaces
with the solution, let stand for 30 minutes and remove. Rinse
the decontaminated surfaces with clean water and remove
rinse water. Allow to dry before putting into service.
Note: Units can be used immediately after rinsing but may
take longer to recharge to 100% capacity.
Thermo Fisher Scientific CryoExtra CE8100 Series Decontaminating and Sanitizing | 77