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Potassium hydroxide solution in ethanol

0,5 mol/l - 0,5 N, volumetric standard solution
Przykłady działania: są łatwopalne; ciecze tworzą mieszaniny wybuchowe z powietrzem; w kontakcie z wodą wytwarzają łatwopalne gazy lub są samozapalne. Bezpieczeństwo: trzymać z daleka od otwartego ognia i źródeł ciepła; szczelnie zamknąć naczynia; przechowywać w miejscu ogniotrwałym.
Przykłady działania: korodują metale i działają żrąco na tkanki ciała; możliwe poważne uszkodzenie oczu. Bezpieczeństwo: unikać kontaktu; nosić okulary ochronne i rękawice. Przemyć wodą w razie kontaktu z oczami i skórą.
Danger
H225-H290-H314
i highly flammable liquid and vapour, may be corrosive to metals, causes severe skin burns and eye damage
P210 P280 P303+P361+P353 P305+P351+P338 P310
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

58,90 €/op. 

plus VAT | 1 l za op.

Nr kat. P707.1

Dostępny krótkoterminowo
od 6 op. 55,96 €/op.
od 24 op. 53,01 €/op.
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Potassium hydroxide solution in ethanol
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Nr kat. Pack Qty. Pack. Cena Ilość
P707.1 1 l glass 58,90 €
Dostępny z magazynu w Karlsruhe
Dostępny krótkoterminowo
Niedostępny
Data dostawy obecnie nieznana
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Informacje ogólne

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

as well as other determining factors such as
• Viscosity
• Density
• Hydroxyl value
• Fluoride ions


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 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


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.


Acid Value Determination

The acid number characterises the acidic components of the fats. For this purpose, the sample is dissolved in a solvent and titrated against phenolphthalein with potassium hydroxide solution. Only free fatty acids are recorded. The fatty acids bound in the glycerides are not determined.


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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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