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EDTA disodium salt solution B, 1 l, plastic

0,01783 mol/l - 0,01783 N, volumetric standard solution
Pack Qty.
Pack.
Density (D) 1,001 g/cm³
Boiling point (bp) 100 °C
WGK 1

1 ml corresponds to 1 °dH (deutsche Härtegrade). For determination of water hardness.

Type analysis

€25.70/Pack Qty. 

excl. VAT. | 1 l per Pack Qty.

Art. No. T137.1

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from 6 Pack Qty. €24.42/Pack Qty.
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EDTA disodium salt solution B
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Order No. Pack Qty. Pack. Price Quantity
T137.1 1 l plastic €25.70
T137.2 5 l ROTI®CUBE €78.40
T137.3 10 l ROTI®CUBE €138.15
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General information

Volumetric Standard Solutions

A volumetric standard solution is a solution containing a precisely known concentration of a substance. The concentration of a volumetric standard solution is determined using a primary standard, which is accurately weighed and dissolved to make a specific volume. Volumetric standard solutions are made using reagent-grade (p.a.) substances as source materials.


Volumetric Standard Solutions, ready-to-use

The advantages of this over making them yourself are:

  • Manufactured and tested using modern manufacturing and analytical methods
  • Ready-to-use solutions
  • High accuracy for precise analyses
  • Application of NIST-certified reference substances for checking
  • Connection to standard titrators is possible


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.


Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

Amount-of-substance conc. (20 °C)0,01783 mol/l ±0,4 %  
Titer0,996-1,004  

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