What is CDS ?

You are currently working on CDS and would like more information about it?
Then you have come to the right place. In the following text we answer the most frequently asked questions and go into many details about CDS a.

In this article we cover the following products:
CDS pure 0.3%
CDS Caps
BioClean
Hydrochloric acid pure 4%
Sodium chlorite 28%

What is Chlorine dioxide?

Chlorine dioxide is a yellow-reddish gas with a sharp, suffocating odor.
Chlorine dioxide is a chemical compound of chlorine and oxygen. The chemical formula is ClO₂.

This means we have one atom of chlorine and two atoms of oxygen.

Boiling point: 11°C
Decomposition from 45°C

what is CDS, chlorine dioxide solution?

Chlorine dioxide solution is by definition water in which Chlorine dioxide gas is dissolved. The term «CDS» comes from C hlor D ioxide Solution.

A standardized value for the concentration of Chlorine dioxide is 0.3% or 3'000ppm (parts per million). That means: 1 liter CDS contains approx. 3 grams Chlorine dioxide.

Chlorine dioxide solution is falsely touted by certain sources as a medicine and miracle cure for your health.

who has Chlorine dioxide discovered?

Chlorine dioxide was probably Humphry Davy discovered it first. In 1811 he recovered it through Disproportionation (splitting) of chloric acid (HClO₃) as the first known halogen oxide.

What is suitable for CDS?

Chlorine dioxide solution is used in various areas. In the textile and pulp industry, Chlorine dioxide as Bleach and has now largely replaced chlorine.

Our matching product: CDS 0.3 % pure

In various countries Chlorine dioxide solution as Food additive used, among other things, as a flour treatment agent and preservative. The solution also continues to be used in the USA to treat poultry, red meat, fish, seafood, and fruit and vegetables.

To disinfection suitable Chlorine dioxide terrific.

As a gas, it is used in areas such as building disinfection and, for example, laboratory disinfection. Chlorine dioxide Thanks to its gaseous properties, it is also used in Mould and fungus control continues to be used successfully.

In certain countries (e.g. Japan) Chlorine dioxide to Air disinfection This is worn in small bags around the neck. Here a defined amount of Chlorine dioxide gas is released into the wearer's surrounding air and disinfects it. In addition, small capsules and bags are placed at certain points in buildings, where they are continuously Release chlorine dioxide gas and thus keep the room air and objects germ-free.

Drinking water treatment:

The city of Zurich, as well as several other cantons, use Chlorine dioxide solution for disinfecting drinking water in the water supply. In Germany it has been used for years to disinfect Lake Constance water as drinking water.

German Drinking Water Ordinance ClO₂: 0.2-0.4 mg/l.

Our matching product: BioClean (see explanation below)

Is Chlorine dioxide solution the same chlorine as in the swimming pool?

In swimming pools Chlorine gas, sodium hypochlorite or calcium hypochlorite These must not be used with Chlorine dioxide because they have different chemical compositions and are therefore fundamentally different.

Is CDS Bleach?

Chlorine dioxide solution can bleach clothes, but it has nothing to do with the chlorine bleach often incorrectly cited in the press.
See Wikipedia:  https://de.wikipedia.org/wiki/Sodium_hypochlorite.

Both chemical formulas contain the chlorine atom:
- Chlorine dioxide has the formula ClO₂
- Bleaching lye is sodium hypochlorite and has the formula NaClO (e.g. swimming pool chemicals).

While correctly prepared chlorine dioxide solution has a neutral pH value (approx. pH 7), the bleach solution has an extremely high pH value >11.
CDS hardly reacts with acid. Accidental splashes on the skin can be washed off quickly and without residue with water.

NaClO, on the other hand, leads to violent, dangerous reactions with acids. Contact with the skin or even the eyes can lead to serious health problems, as alkalis are viscous and can only be slowly rinsed off with a lot of water and the contamination time is therefore considerably longer than with, for example, CDS.

CDS compared to chlorine

Chlorine dioxide is even more effective against bacteria than chlorine. In contrast to chlorine, CDS also effective against viruses and many protozoa (single-celled organisms). Many scientific studies have been testifying to this for many years, particularly in the USA and Japan.

The advantage of CDS to chlorine: CDS forms significantly fewer chlorinated hydrocarbons from organic material.

Alternatively, ozone (O₃) is used. The disadvantage is that ozone can react with bromides, which occur naturally in water. This reaction forms carcinogenic bromates.
This reaction occurs in Chlorine dioxide not take place.

In medicine, hydrogen peroxide (H₂O₂) is often used to disinfect the body. Unfortunately, due to its high redox potential, it destroys not only germs but also human tissue.

«Toxicity» of CDS (Source Wikipedia)

The lethal dose (LD, Latin In toxicology, the lethal dose is the dose of a specific substance that is fatal to a specific living being.

A fatal effect can occur at much higher or even lower doses/concentrations, for example in the case of weakness due to disease.

Therefore, the dose usually given is the one whose lethal effect relates to 50 percent of the observed population: the median lethal dose LD_50.

Comparison of "lethal dose" LD50 of table salt and CDS

Table salt (NaCl): LD₅₀ 3,000 mg/kg body weight
Content in 1 kilo of table salt: 1000 grams
1 g or ml CDS contains 1.00g NaCl

Assumption: Human of 70 kg body weight
_LD50 Amount of table salt: 70 * 3g = 210 g NaCl per person as LD₅₀

Chlorine dioxide (ClO₂): LD₅₀ 94 mg/kg body weight.
Content in 1 kilo CDS: 3 grams
1 g or 1 ml CDS contains 0.003g ClO₂

Assumption: Human of 70 kg body weight
_LD50 Amount of ClO₂: 70 * 0.094g = 6.58 g ClO₂ per person
6.58 g _ClO2 / 3 g _ClO2 /l = 2.19 liters CDS per person as LD₅₀

Decomposition products of CDS

Chlorine dioxide When used and when decomposed (more or less slowly during storage), it breaks down into tiny amounts of water and table salt. There are no other residues.

Storage: Can CDS expire?

Chlorine dioxide solution steadily decreases in concentration. The speed of the process depends, in addition to its neutral pH value, particularly on storage. The Chlorine dioxide is bound in water. The gas tends to decompose, reducing the concentration of the solution.

Depending on the frequency of use and the storage temperature, exposure to light, the concentration of the contents may decrease more slowly or more quickly over time.
Reason: When the bottle is opened (especially above 11°C) a small amount of chlorine dioxide gas escapes from the bottle and the concentration slowly decreases. Light (UV radiation) can also neutralize the chlorine dioxide. If stored at too high a temperature (45°C) it decomposes. CDS.

We give you the following recommendation for storage:

- protect from sunlight
- store below 11°C
- Always close containers tightly
- if necessary, store in the refrigerator

Quality test: Is this CDS still good?

A simple way to check: As long as the drops or liquid are yellow and smell like a "swimming pool", it still contains at least a certain amount of chlorine dioxide . If necessary, increase the amount used accordingly.
Colorless solutions without a "swimming pool smell" have lost their effectiveness and should be disposed of. Pour them into the sink or toilet.

How long does CDS in the refrigerator?

We guarantee the minimum shelf life of our CDS for 6 months, provided the container is stored unopened, in a dark and cool place. Depending on the storage conditions, the CDS can remain usable for many months longer.

to travel with CDS

When travelling, it is therefore important to ensure that CDS kept insulated against heat and protected from overheating.

Practical alternative: «CDS Caps» from mychem.ch are an ideal CDS carriers are dry and therefore easier to transport and store. The full CDS effect occurs after dissolving in water after a certain time.

Our matching product: CDS Caps

As is CDS manufactured?

There are various methods CDS to produce:

These manufacturing processes are known as chemical and/or electrolytic reactions.
However, depending on the components etc., the concentration and residual content (purity) can vary greatly.

• A well-known method is the reaction of sodium chlorite with hydrochloric acid and other acids and dilution with water.
• Another is to react the two and dissolve the ClO₂ gas in water.
• An electrolytic variant is to use an electrolysis device to treat sodium chlorite.

The above methods are generally known among end users and are used by them more or less successfully.

Then there are other processes that are known to the industry and used by it.

• Chlorine-chlorite process: Chlorinated water with an acidic pH value (<2) is reacted with 10% sodium chlorite solution.
• Hydrochloric acid-chlorite process: Sodium chlorite is treated with hydrochloric acid to Chlorine dioxide , table salt and water are reacted. When reacting with sodium peroxodisulfate, sodium sulfate is produced as a by-product. This also occurs naturally in drinking water.
• Chlorine dioxide is also obtained on a laboratory scale by oxidation of chlorite. The oxidizing agent is either sodium peroxodisulfate Na2S2O8 or chlorine gas.
• Chlorine dioxide can alternatively be obtained by disproportionation of sodium chlorite in acidic solution.
• The conversion of potassium chlorate using concentrated sulphuric acid is another method. Oxalic acid is added to reduce the risk of explosion. This creates a Chlorine dioxide -carbon dioxide mixture.
• The reduction of chlorate by hydrogen peroxide is another possibility for producing moderate amounts of Chlorine dioxide for technical use.

The production and quality including concentration of our CDS and the caps are described in the respective articles in the shop.

Please understand that we keep the exact recipes of our own developments secret.

Chlorine dioxide solution in four different variants at mychem.ch

At mychem.ch you can access the Chlorine dioxide solution.

• Our new, practical: CDS Caps
• Our technical solution: CDS 0.3% pure (100ml/250ml)
• Our certified Biocide: BioClean universal and drinking water disinfectant
• Our two-component solution: Sodium chlorite 24-26% (or 25% pure) and Hydrochloric acid 4% pure

For product comparison, a table of products:

Information about Manufacturing method from CDS with caps and the two-component solution (sodium chlorite & hydrochloric acid) please refer to the respective product description.

BioClean

BioClean is an officially approved biocide with the registration number CHZN3849.
BioClean is a disinfectant and consists of a solution of 0.3% chlorine dioxide (ClO₂) in water.
Disinfectants are substances that kill microorganisms and thus prevent the transmission of pathogens.

Instructions for use for drinking water disinfection
Depending on the level of contamination and cloudiness caused by suspended matter, pre-filter the raw water using a cloth (e.g. pocket ash cloth) or a filter. Add 0.7 ml or 12-18 drops of BioClean per litre of water and mix briefly. Sterilised after 20 minutes of storage in a dark place. Very suitable for disinfecting drinking water in mobile homes.

Instructions for surface disinfection
Lightly moisten the surface to be cleaned with a damp kitchen paper or cloth. Then add 5-10 drops of BioClean per dm2 of surface, depending on the level of dirt. Spread evenly over the surface to be cleaned. Repeat treatment as required.

BioClean is a product with a wide range of uses. It can be used in a variety of everyday situations. Here are a few examples and suggestions:

• Preventing the formation of algae, e.g. in the fountain, the rain barrel or the bird bath
• Cleaning your water bottle
• Cleaning of tools for processing food, e.g. a pocket knife
• Cleaning water tanks in caravans and motorhomes
• Cleaning your fruits or vegetables when travelling to prevent Traveler’s diarrhea and poisoning

Instructions for making Chlorine dioxide solution from sodium chlorite and hydrochloric acid

Preparation

Make sure the room is well ventilated, as during the chemical reaction Chlorine dioxide gas escapes and you must not inhale it.
Danger Only mix small amounts, e.g. three drops each. Larger amounts produce large amounts of gas.

execution

Mix sodium chlorite 25% (NaClO₂) and hydrochloric acid 4% (HCl) in a ratio of 1:1 in a container. The dropper insert from our 100ml bottles is suitable for this. Alternatively, you can use a pipette (rinse well after using each chemical).

After about 45 seconds the color will turn dark yellow to amber. Add the required amount of water. Now you can CDS use.

Our matching products: Sodium chlorite 24-26% (or 25% pure) (NaClO₂) & hydrochloric acid 4% pure (HCl)

Ratio of finished Mychem CDS compared to the self-assessed CDS

One drop of NaClO₂ and HCI correspond to the ClO₂ effective amount of eight drops of our finished CDS.
Example: 3 drops of NaClO₂ mixed with 3 drops of HCl = 24 drops of Mychem CDS

Purities

Commercial chemicals are usually available as "technical quality". This is usually the "poorest" quality and always contains a relatively large amount of "impurities" from the raw materials and the manufacturing process in plants that have not been cleaned very thoroughly. "Normal" sodium chlorite and hydrochloric acid therefore contain certain amounts of various "impurities".

The mixture of NaClO₂ and HCl obtained CDS logically contains the by-products from the raw chemicals and does not reach the purity of our finished CDS.

For the manufacturing process, we only use highly pure, very expensive raw materials that are not commercially available.

The manufacturing process of our CDS is a special, complex Mychem in-house development based on the reaction process.
The result is our CDS in its purest form.

Content of CDS on the market

The mychem chlorine oxide solution with 3000 ppm ClO₂ has a strong yellow color. The content is monitored during production with a precise measuring device. Comparisons with other CDS show that these are usually only around 1000 ppm ClO_2. This means that the mychem CDS is very extensive.