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I found an article today that was presented to everyone at the RCIA from Chris Tucker a friend from Tampa and owner of Apple Roof Cleaning. This is for everyone who wanted to know if Chlorine / Sodium Hypochlorite is safe for people, pets and plants as well as the environment and roofs. Note: All major and non major roofing manufacturers recommend the CORRECT use of chlorine bleach as the base chemical for cleaning roofs just FYI!
Here isthe article as a copy and paste from the RCIA website.
Here is the low down on Sodium Hypochlorite.
Human and Environmental Safety
During the last few years there has been a concerted effort to investigate and assess the human and environmental safety aspects of sodium hypochlorite. An extensive review of the literature has been undertaken by many investigators and the conclusions drawn are that sodium hypochlorite is safe for humans and the environment.
Depending on the concentration involved, hypochlorite solutions can be classified as either irritant or corrosive and appropriate precautions should be taken when using the product, carefully reading the label, adhering to cautionary warnings and following usage directions. Particular attention must be paid to not mixing with other products, such as toilet bowl cleaners, rust removers, ammonia or acids. Although skin and mucous membrane irritation can occur when the exposure concentration is greater than 5%, these effects are reversible. The overall safety of sodium hypochlorite is further documented by reports from poison control centres in North America and Europe which show no major health effects after unintentional ingestion or skin contact. The unpleasant taste of the product prevents unintentional ingestion of significant quantities and thereby limits the extent of injuries. It is documented that sodium hypochlorite is not a mutagen, carcinogen, teratogen or skin sensitizer. Indeed, in the context of its use in drinking water, IARC (the International Agency for Research on Cancer) has concluded that chlorinated drinking water is not a “classifiable” human carcinogen. Under normal household use, sodium hypochlorite is broken down in the environment into table salt, oxygen and water. Other substances may be formed, to a small extent. These by-products are most often referred to as AOX (adsorbable organic halides). A great many studies have been made to provide a risk assessment of household bleach in terms of its formation of AOX. The conclusions drawn were:
- the amount of AOX is very small both in absolute terms and relative to other human activities and natural sources,
- the majority of these AOX are easily degradable,
- the AOXs formed are primarily water soluble and not bio-accumulative.
- highly chlorinated species, such as dioxins, are not formed.
The conclusion of the Swedish Environmental Research Institute was that sodium hypochlorite “does most probably not create environmental problems when used in the right manner and in recommended quantities”.
Sodium hypochlorite has a long history of safe use in homes, hospitals and schools, and it is widely available at low cost to consumers. It is highly beneficial to basic hygiene and good health due to its disinfecting and sanitizing qualities. It kills all known germs and a wider range of bacteria than other disinfectants, and it helps to prevent the spread of diseases through water and surfaces.
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