Demineralized water (distilled water) 5l

TECHNICAL DEMINERALIZED WATER
Demineralized water - Your reliable partner for technical applications

The supplier uses state-of-the-art technology to ensure that our demineralized water has a conductivity of less than 5 µS/cm and a pH of 7 .
This means that every drop of our water is a symbol of purity and quality .

Packaging and distribution
We pack and transport demineralized water most often in IBC containers with a volume of 1000 L, which corresponds to a weight of 1000 kg.
We offer the option of renting or purchasing tanks.
We also provide a service of pumping water directly into customers' tanks.

Technical data:
Specific electrical conductivity < 2 µS/cm
Silicon dioxide SiO2 < 100 µg/l
Iron < 30 µg/l
Copper < 10 µg/l
Hardness < 5 µg/l (CaCO3 - Calcium Carbonate)
COD Mn < 5 mg/l (oxidizability by permanganate, Chemical Oxygen Demand (COD) - Manganometric determination)
pH: 7
CAS: 7732-18-5
Formula: H2O
Appearance: clear liquid

DISTILLED - DEMINERALIZED TECHNICAL WATER
The name of the water may be listed as technical, demineralized or distilled, but all of these types of water are actually the same, differing only in the method of production. The technical composition may vary slightly depending on the manufacturer and their equipment for the production of technical water. You will also encounter the abbreviation demi water.
Distilled water is a special type of water that has undergone a process of demineralization . This process means that the water contains a minimal amount of ions (cations and anions), which results in a colorless, clear, odorless liquid without mechanical impurities. It is water devoid of all trace elements that could affect its purity and quality.

What is demineralized water?
Demineralized water is water that has had its minerals and ions removed through ion exchange or reverse osmosis. The water is passed through a resin bed where the minerals and other impurities are removed, resulting in very pure water with a neutral pH, ideal for laboratory experiments and industrial processes.

The difference between demineralized and distilled water
Demineralized water differs from distilled water in the process of obtaining it. Distilled water is created by heating water to its boiling point and then condensing the vapor, thereby removing impurities. However, distillation is not energy efficient or clean enough for all applications, while reverse osmosis allows for higher water purity.

;">Other names:

• Distilled water
• Demi-water
• Deionized water (DI water)
• Distilled water
• Deionized water
• Demineralized water
• Ultrapure water
• Clean water

• For irons
  
• Into batteries
• For diluting mixtures
• For humidifiers
• For photo processing
• For cutting materials - wire cutting and water jet cutting
• For laboratory analyses - where a clean environment without minerals is needed
• Into the autoclave - for sterilization, where water purity affects the quality of sterilization
• In steam generators - to prevent mineral deposits
• For cooling systems - where water with low mineral content is required (note: for some types of coolers, higher conductivity is needed for heat dissipation)
• For maintenance and cleaning of electronics - where it is necessary to use ion-free water
• For battery maintenance - especially if it is a special type of battery requiring clean water
• In cosmetic and pharmaceutical laboratories - for the preparation of solutions and products
• Paint production
• Cleaning plants
• Aquariums
• Production of windshield washer fluids and coolants
• Chemical solutions
• Mirror and glass production
• Filling underfloor heating systems

This water is intended for technical purposes only.
For coolers, technical demineralized water alone is too pure and has little conductivity.
For radiators, high conductivity technical water should be used according to the manufacturer's specifications. Therefore, a mixture of water and concentrated coolant is created.

Cooling systems use coolants that, in addition to providing antifreeze properties, also provide the necessary conductivity. Therefore, use clean demineralized water only for flushing or topping up an already filled cooling system.

An example is the use in combustion cars, where demineralized water is mixed with concentrated coolant in the ratio required to create a suitable mixture.

Types of demineralized water according to the production process:

• Reverse osmosis (RO): The most common method for producing demineralized water. It provides high purity, but may need to be combined with another stage of treatment to achieve the required conductivity for chillers.
• Ion exchange: Used to achieve extremely low conductivity, but can be combined with other methods for specific needs.
• Electrodeionization (EDI) or Continuous Electrodeionization (CEDI): A combination of reverse osmosis and ion exchange, it provides consistently high water quality with minimal maintenance costs.

Choosing the right type of demineralized water for a chiller depends on the specific requirements of the system, including requirements for conductivity, pH, and other parameters.

Quality and control
Demineralized water is carefully measured with laboratory instruments.
Regular tests by accredited laboratories.
Each dose is also disinfected using UV-C light to kill bacteria and viruses.
The tanks are disinfected with ozone.

Practical use
It is used in laboratories to eliminate unwanted reactions caused by minerals in ordinary tap water. In industry, it is essential for the production of semiconductors, pharmaceuticals and cosmetics, where water purity plays a key role.

Conductivity and pH measurement
The conductivity of demineralized water is measured using special meters, as ordinary meters are not suitable for such low conductivity. The pH of demineralized water should theoretically be neutral, but in practice it can become slightly acidic due to the dissolution of carbon dioxide from the atmosphere.

Water hardness
Demineralized water has zero hardness because reverse osmosis removes virtually all calcium and magnesium ions, meaning the water is completely soft.

Demineralized water in coolers and conductivity
In the context of chillers, water conductivity is a key parameter. Demineralized water, which is too pure and has a low conductivity (typically less than 1-5 µS/cm), is not suitable for some types of chillers, especially if the system requires a certain level of conductivity for proper operation.

• Corrosive properties: Very pure water can be corrosive to metal parts of a cooler because its low conductivity means it can more easily remove ions from metals.
  
• Electrical insulation: In cooling systems, where water needs to have a certain conductivity for proper prevention of corrosion processes or for electrochemical reactions, too low conductivity is unsuitable.

Therefore, demineralized water is often used for coolers, which has been "treated" to achieve a certain level of conductivity that is in line with the cooler manufacturer's requirements. This water may not be as pure as ultrapure demineralized water, but it is still free of most minerals and impurities that could cause problems such as scaling or corrosion.

Changing the conductivity of water after its demineralization or distillation can be achieved by several methods:

Adding minerals or salts:
Sodium Chloride (Table Salt): A simple and common way to increase conductivity is to add a small amount of table salt. The salt will dissolve and increase the ion content of the solution, thereby increasing conductivity.
Calcium or magnesium chloride: These salts can be used to increase conductivity and also increase the hardness of the water, which can be advantageous or disadvantageous depending on the application.
Sodium bicarbonate (baking soda): Increases conductivity while slightly increasing the pH of the water.

Procedure:
Add a small amount of salt or mineral to the water. Stir until dissolved. Measure the conductivity using a conductivity meter to ensure the desired level is reached.

Adding electrolytes:
Electrolytes such as potassium chloride or magnesium sulfate can be added to increase conductivity. These substances dissolve quickly and dissociate into ions.

Adding acids or bases:
Hydrochloric acid (HCl) or sulfuric acid (H₂SO₄) can be used to slightly lower the pH and increase the conductivity.
Sodium hydroxide (NaOH) or sodium carbonate (Na₂CO₃) to increase pH and conductivity.

Use of ion exchangers:
If there is a need to reduce conductivity, you can use ion exchange with regenerated resins that remove ions from the water.

A combination of multiple methods is often used to achieve the desired conductivity and chemical composition of water.

Procedure for reducing conductivity:
Use ion exchangers or reverse osmosis if conductivity needs to be reduced.
For home use, reducing conductivity can be more complicated because it requires specific equipment.

Remember that any change in water composition can affect its other properties, such as pH, hardness or corrosiveness, so all changes should be made with the end use of the water in mind.

• Example:
  1 gram of NaCl in 1 liter of water increases the conductivity by approximately 2 µS/cm, to achieve an increase in conductivity of 1 µS/cm we would need 0.5 grams of NaCl per 1 liter of water. For 1000 liters of water you would add approximately 500 grams of sodium chloride to increase the conductivity by 1 µS/cm.

Sometimes two types of conductivity are given: Cathetized and Specific

The difference between Cathexed Conductivity and Specific Conductivity lies primarily in how these values are measured and interpreted:

Cathetized conductivity:
This term is often used in the context of cation exchange measurement, which is a specific method of measuring conductivity where water is passed through a cation exchange (ion exchange) column to remove metal ions.
Thus, cation-exchanged conductivity refers to the conductivity of water after it has been treated by ion exchange, where cations are replaced by hydrogen ions (H⁺) and anions by hydroxide ions (OH⁻), resulting in water with very low conductivity unless recontaminated.
This type of conductivity is often used as an indicator of water purity after a demineralization or deionization process.

Specific conductivity:
Specific conductivity is a measure of the ability of water to conduct electrical current and is expressed in µS/cm (microsiemens per centimeter) or mS/cm (millisiemens per centimeter).
This parameter measures the overall conductivity of water as it is, without any specific treatment or pre-treatment. It shows how many ions (of any kind) are present in the water, as ions in solution allow an electric current to flow.
Specific conductivity is therefore a more general measurement that reflects the overall ionic composition of water, including all minerals, salts, and other soluble substances.

Key differences:

Purpose of measurement: Cathexed conductivity is measured after a specific water treatment process, while specific conductivity is measured directly on a water sample without pre-treatment.
Water purity: Cated conductivity indicates the level of water purity after the ion exchange process, while specific conductivity only shows the total ion concentration regardless of its origin or quality.
Practical application: Cated conductivity is often used in industrial processes where water purity is key, e.g.for example in electronics or pharmaceutical manufacturing, while specific conductivity is more common for general water quality assessment, water resource monitoring, or process control where specific treatment is not emphasized. These values should be different because they reflect different aspects of water conductivity.