Can we visualize the Sterilization effect of chlorine dioxide and sodium hypochlorite!

Chlorine dioxide and sodium hypochlorite have been demonstrated to be effective in eradicating viruses and bacteria in tests conducted by various third-party specialists,

In practice, it is difficult to visualize scenes that are eradicating viruses and bacteria, and many question their effectiveness as they “don’t know if they are working.”

Therefore, we conducted a comparative study of the antifungal effects of fungi as an easy-to-understand experiment by visualizing the effect of chlorine dioxide and sodium hypochlorite on the eradication of fungi.

“Antifungal power = all viruses, bacteria elimination power” cannot be said. However, the chemical reaction of chlorine molecules that inhibits the development and growth of new parental mold by oxidizing and degrading the spores of fungi produced by the parental fungi and by losing their potency is similar to the effect on viruses and bacteria.

Refer to for very interesting results.

To compare the incidence of fungi, the following conditions were used to observe the growth status of fungi: (a) those that did not take preventive measures against fungi; (b) chlorine dioxide (nanoclo2 mobile type); and (c) sodium hypochlorite (5ppm of premium dia).

Installation requirement

Installation space, placed inside a 30 cm legislative acrylic case.
1 shortage of bread
Humidity: 90% to 100% (increase humidity with a naturalized humidifier)
Room temperature set around 25°C.

Have no preventive measures against fungi
Chlorine dioxide 3g
(nanoclo2 mobile type)
Sodium hypochlorite 5 ppm
(50 ppm Premium dia diluted 10-fold in tap water)

1. No antifungal

Day 1 2016.2.25

Day 5 2016.2.29

Black mold begins to grow on the surface

On March 9, 2016.3.4

Black molds spread at multiple sites
Blue mold develops in plaques
There are sporadic white mold spores.

Day 13 2016.3.8

Black mold covering 6 to 7 breaks

Mold growth status on day 13

 

2.Antifouling Effects by Chlorine Dioxide Gas (Nanoclo2 3g)

Day 1 2016.2.25

Day 5 2016.2.29

On March 9, 2016.3.4

Day 13 2016.3.8

Mold growth status on day 13

On the top and four sides of the bread (the pan’s mummy) where chlorine dioxide gas seems to be in contact, even after 13 days Mold development is not seen.

However, molds begin to develop on the bottom (where they were in contact with the dish) that is not in contact with chlorine dioxide gas from day 5,It could be confirmed that its growth speed was significantly slower than that in the condition without fungicides.

Antifungal effect of sodium hypochlorite (natural vaporization)

Day 1 2016.2.25

Day 5 2016.2.29

On March 9, 2016.3.4

Day 13 2016.3.8

 

Mold growth status on day 13

Black molds developed on the bread surface from day 12. On the 13th day, blue molds also appeared on the side of the bread (mummy part) in patches. The antifungal effect of natural vaporization of sodium hypochlorite was found to occur after a few days in closed spaces without airflow and when the humidity lasted for more than 100% for several days.

[Discussion of the causes of mold development].

Since the humidity in the acrylic case of the 30 cm legislation is 100% or more for a long time, it is considered that the effective chlorine concentration of sodium hypochlorite vaporized in the acrylic case has disappeared because the natural vaporization of sodium hypochlorite has stopped. The occurrence of molds in nonwoven fabrics to be vaporized is thought to have occurred because only the effective chlorine concentration was vaporized, and only water whose chlorine concentration had passed remained in the nonwoven fabrics for a long time.

The back surface of the bread was not in contact with the chlorine of sodium hypochlorite originally, and molds developed as a surface with no fungicidal effect.