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Test kit Water hardness

From  ROTH SELECTION
Examples of effect: Flammable; liquids form compounds with the air which can become explosive; produce flammable gases with water or can self-combust. Safety: Keep away from open flames and sources of heat; close containers tightly; store in a fire-safe manner.
Examples of effect: Lead to damage to heath, cause irritation to eyes, skin or respiratory organs. Are fatal in larger quantities. Safety: As previously stated, in the event of skin irritation or contact with eyes, rinse with water or a suitable medium.
Warning
H226-H319-H336
i flammable liquid and vapour, causes serious eye irritation, may cause drowsiness or dizziness
P210 P304+P340 P305+P351+P338
i keep away from heat, sparks, open flames, hot surfaces. No smoking, IF INHALED: Remove person to fresh air and keep comfortable for breathing, IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing
Water hardness kit
Density (D) 1 g/cm³
Boiling point (bp) >80 °C
Flash point (flp) 25 °C
ADR 3 III
WGK 1
UN-Nr. 1993

Test reagent in dropper bottles

A 5 ml water sample is added drop by drop as a test reagent until there is a change in colour. Each  ...
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Art. No. 0519.1

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A 5 ml water sample is added drop by drop as a test reagent until there is a change in colour. Each drop corresponds to 1° dGH.



Test kit Water hardness 

Technical Information
Verification of Water hardness 
Packaging 2 x 15 ml 
Pack. 2 x 15 ml 
Test kit Water hardness
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General information

Determination of Water Hardness

Water contains a whole host of salts and other compounds in addition to the gases dissolved in it (oxygen, nitrogen, carbon dioxide). Its most important constituents are magnesium and calcium in the form of their chlorides, sulphates and bicarbonates. These dissolved salts are known as hardeners. The bicarbonates precipitate in the heat (during boiling) as carbonates and are known as carbonate hardness or temporary hardness. The sulphate and chloride compounds are known as permanent hardness or non-carbonate hardness. Total hardness describes the concentration of alkaline earth metal ions in water.

The unit of measurement for water hardness used to be 1 °dH (German degrees of hardness), which corresponds to 10,00 mg CaO or 7,19 mg MgO in one litre of water. Today we use millimoles per litre (mmol/l), whereby 1 °dH corresponds to 0,18 mmol/l of earth metal ions and 1 mmol/l corresponds to 5,6 °dH.


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