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Karl Fischer methanol ROTI®Hydroquant D, 2.5 l

for KF titration, dry
Icon_EVE-EUD Please consider that this product might be liable to some legal sanctions as for example to obtain an end user declaration or the prohibition of some applications. For details please do contact your counterpart in our sales department!
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: In smaller quantities, lead to immediate serious damage to health or death. Safety: Do not inhale, touch or swallow. Wear work safety equipment. Call a poison control centre or doctor immediately. Recovery position.
Examples of effect: Have an allergenic effect, carcinogenic, mutagenic, toxic to reproduction and cause developmental toxicity (reprotoxic) or damage to organs Safety: You must be well-informed before starting work with these substances; wear protective clothing and gloves, eye protection and mask or breathing protection.
Danger
H225-H301+H311+H331-H370
i highly flammable liquid and vapour, toxic if swallowed, in contact with skin or if inhaled, causes damage to organs (eye)
P210 P270 P280 P303+P361+P353 P304+P340 P308+P311
i keep away from heat, sparks, open flames, hot surfaces. No smoking, do not eat, drink or smoke when using this product, wear protective gloves/eye protection, IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower], IF INHALED: Remove person to fresh air and keep comfortable for breathing, IF exposed or concerned: Call a POISON CENTER/doctor
Related products
Pack Qty.
Pack.
Methanol for water analysis, Volumetric Karl Fischer solutions, Water determination acc. to Karl Fischer, Methyl alcohol, Reagents for water analysis
Density (D) 0,79 g/cm³
Boiling point (bp) 65 °C
Flash point (flp) 9,7 °C
Melting point (mp) -98 °C
ADR 3 II
WGK 2
UN-Nr. 1230

Solvent component

Guarantee analysis
CHF69.30 /Pack Qty.

CHF55.40/Pack Qty.  Campaign price!

excl. VAT. | 2.5 l per Pack Qty.

Art. No. T193.2

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Karl Fischer methanol ROTI®Hydroquant D
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T193.1 1 l glass CHF30.80
T193.2 2.5 l glass CHF55.40
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General information

Karl Fischer Reagents
ROTI®Hydroquant

There are two established Karl Fischer methods of calculating the water content of a substance: Volumetric analysis and coulometric analysis.

Which method is chosen depends primarily on the water content that the sample is expected to have. Making the right choice is vital for obtaining reliable and reproducible results. Carl ROTH offers compatible reagents for both of these methods.


Volumetric Reagents

Karl Fischer volumetric analysis is recommended if the water content of a sample ought to be between 0,1 % and 100 %. Volumetric analysis is performed by measuring the amount of Karl Fischer reagent that needs to be added to a substance until the end point of the titration has been reached. In alcoholic solutions, water reacts 1:1 with iodine in the presence of sulphur dioxide. Methanol and sulphur dioxide form an acid ester that is neutralised by the base (e.g. imidazole, hereafter referred to as "RN" for simplicity).

CH3OH + SO2 + RN → [RNH]SO3CH3

In the titration process, iodine is added which reacts with water to be reduced to colourless iodide:

[RNH]SO3CH3 + H2O + I2 + 2 RN → [RNH]SO4CH3 + 2 [RNH]I

This reaction continues until there is no water left. The end point is determined by a change in colour due to a surplus of iodine and measured using a potentiometer.


Single-component Reagents
Single-component reagents contain all the substances required for the Karl Fischer reaction in a single solution. They are easy to use and provide for a high level of flexibility when choosing a solvent for the sample type. The high reactivity of the components means that the titre for single-component reagents must always be determined before titration is carried out. Reactions with standard reagents containing methanol are not possible for samples that contain aldehydes or ketones, as the methanol will react with them to produce extra water in a secondary reaction. Carl ROTH offers methanol-free reagents that are suitable for substances containing aldehydes and ketones.


Analysis certificates

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:

Guarantee analysis

Assay (GC)≥99,5 %  
Water (H2O)≤0,01 %  

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