Biocides

According to BPR Regulation (Biocidal Products Re-

gulation) (EU) 528/2012 biocidal products are:

• any substance or mixture, in the form in which it

is supplied to the user, consisting of, containing or

generating one or more active ingredients, with the

intention of destroying, putting off, rendering harm-

less, preventing the action of, or otherwise exerting

a controlling effect on, any harmful organism by

any means other than mere physical or mechanical

action,

• any substance or mixture, generated from sub-

stances or mixtures which do not themselves fall un-

der the first indent, to be used with the intention of

destroying, putting off, rendering harmless, preven-

ting the action of, or otherwise exerting a controlling

effect on, any harmful organism by any means other

than mere physical or mechanical action.

• a treated article that has a primary biocidal fun-

ction shall be considered a biocidal product;

Below are the active ingredients authorized under

the BPR regulation for PT2 applications:

• Sodium hypochlorite (active chlorine)

• Propan-2-ol (synonyms: isopropanol; isopropyl al-

cohol)

Therefore: any product that carries on the label the

words “Product approved according to EU Regula-

tion 528/2012 reg. No. 123456789”, which contains

the active ingredients indicated in the ISS report, is

a product suitable for surface disinfection opera-

tions.

For the purpose of appropriate use, it should be no-

ted that the various products for disinfection (with

specific properties against micro-organisms) are dif-

ferent from cleaners and sanitizers with which, the-

refore, should not be confused.

For the latter, among other things, there is no prior

authorization but must be conformed to the legisla-

tion on cleaners (sanitizers for the environment) or

on cosmetic products (sanitizers) for skin) or other

relevant legislation.

The report of the ISS No. 33 of 25 May 2020 mentio-

ned above, in addition to explaining in detail the role

that air conditioning and ventilation systems play in

the spread of the virus, dedicates an entire chapter

to routine maintenance and cleaning of such plants:

“The ideal disinfectant should meet a number of es-

sential requirements that can be summarized in: ra-

pid and persistent action; biocidal activity with broad

spectrum of action; absence of with indications for

humans, the environment and the materials to be

treated under normal conditions of use; ease of ap-

plication. To date none of the disinfectants

in use is able to fully meet all these requiremen-

ts: it will therefore be necessary to choose, on a

case-by-case basis, the product and the conditions

of use most appropriate to the achievement of the

health objectives limiting to a minimum the poten-

tial negative effects that may result from their use.

Although there are no definitive specific data on ef-

ficacy against SARS-CoV-2, the results from tests

performed on other coronaviruses indicate that any

type of disinfectant that, pursuant to current legi-

slation, claims to have a nonspecific or specific

virucidal action, is capable of inactivating this

type of virus, less resistant than others, without en-

velope (“naked” viruses).”

Some effective solutions

Hypochlorous acid

The hypochlorous acid contained in WL-ASETTIX,

chemical formula HClO, owes its disinfectant ca-

pabilities to the presence of a chlorine atom with

oxidation number +1, which makes it highly oxidi-

zing. The product can be atomized to saturation

for a treatment of the air and the hardly reachable

surfaces. For these activities it is possible to dilute

it up to 150 mg/L of active chlorine (dilution 30%

with preferably demineralized, osmotized or distil-

led water) and atomize it. Once sanitizing is carried

out, it is necessary to let the fog remain in suspen-

sion inside the closed environment and empty at

least 15 minutes (time considered sufficient for the

action of disinfectants/sanitizers) before removing

any excess product with a clean cloth, without rin-

sing. For use in hygienic tunnels aimed at sanitizing

goods, equipments and persons, it is possible to

dilute the product up to 150 mg/L of active chlorine

(dilution 30% with water preferably demineralized,

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