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Karl Fischer ROTI®Hydroquant Working Medium K

for KF titration, for aldehydes and ketones
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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
H300+H310+H330-H315-H319-H351-H361d-H372
i fatal if swallowed, in contact with skin or if inhaled, causes skin irritation, causes serious eye irritation, suspected of causing cancer, suspected of damaging the unborn child, causes damage to organs through prolonged or repeated exposure
P260 P280 P302+P352 P304+P340 P308+P313
i do not breathe mist/vapours/spray, wear protective gloves/protective clothing/eye protection/face protection, IF ON SKIN: Wash with plenty of soap and water, IF INHALED: Remove person to fresh air and keep comfortable for breathing, IF exposed or concerned: Get medical advice/attention
Related products
Pack Qty.
Pack.
Volumetric Karl Fischer solutions, Water determination acc. to Karl Fischer
Density (D) 1,34 g/cm³
Flash point (flp) >100 °C
ADR 6.1 I
WGK 3
UN-Nr. 2810

Solvent component
Use with Karl Fischer ROTI®hydroquant C5 K.

Guarantee analysis
CHF97.30 /Pack Qty.

CHF77.80/Pack Qty.  Campaign price!

excl. VAT. | 1 l per Pack Qty.

Art. No. 5215.1

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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

Application testcomplies  

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