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Potassium hydroxide solution in ethanol

0,5 mol/l – 0,5 N, volumetric standard solution
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: Damage metals and burn body tissues; may cause serious eye damage. Safety: Avoid contact; wear safety spectacles and gloves. In the event of contact with eyes and skin, rinse with water.
danger
H225-H290-H314
i highly flammable liquid and vapour, may be corrosive to metals, causes severe skin burns and eye damage
P210 P280.7 P303+P361+P353 P305+P351+P338 P310.0
i keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking, wear protective gloves/eye protection, IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower], IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing, immediately call a POISON CENTER/doctor
Pack Qty.
Pack.
Density (D) 0,842 g/cm³
Boiling point (bp) 78 °C
Flash point (flp) 12 °C
ADR 3 II
WGK 1
UN-Nr. 2924


Type analysis

€58.60/Pack Qty. 

excl. VAT. | 1 l per Pack Qty.

Art. No. P707.1

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General information

Analysis of Food

Carl ROTH also offers reagents suitable for food analysis.

On the following pages, you will find the determination of
• Nitrogen according to Kjeldahl
• Sugar
• Mercury
• Trichinae
• Fat

and the determination of the
• Iodine value
• Acid value
• Peroxide value
• Saponification value

Acid value determination

The acid value expresses the acidic components of fats. To calculate this value, a sample is dissolved in a solvent and titrated with a solution of potassium hydroxide with phenolphthalein as the colour indicator. Only the free fatty acids are captured; the fatty acids bound in the glycerides are not.

Saponification value

The saponification value denotes the amount of potassium hydroxide required to neutralise free fatty acids and saponify bound fatty acids. The lower the average molar mass of the fat, the higher the saponification value. The sample is heated under reflux in a defined quantity of ethanolic potassium hydroxide solution and the non-used alkaline solution is titrated with hydrochloric acid.

Volumetric standard solutions

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

Classics__Hydroxyl value

The hydroxyl value is a measure of the hydroxy group content of organic materials such as paints, resins, polystyrenes, solvents and lipids. It represents the amount in milligrams of potassium hydroxide required to neutralise the quantity of acetic acid that combines on acetylation of one gram of the substance being tested.

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:

Type analysis

Amount-of-substance conc. (20 °C)0,5 mol/l ±0,4 %
Titer0,996-1,004
Discolouration (yellow) is possible, but it has no effect on the usability.

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