Ethanol, 2.5 l, plastic
Molar mass (M) 46,07 g/mol
Density (D) 0,79 g/cm³
Boiling point (bp) 78 °C
Flash point (flp) 12 °C
Melting point (mp) -114 °C
ADR 3 II
CAS No. [64-17-5]
€134.25/Pack Qty. Campaign price!
excl. VAT. | 2.5 l per Pack Qty.
Art. No. P075.4
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Ethanol 96 %, Ph.Eur., extra pure
|Checked according to pharmacopoeia||Ph.Eur.|
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Carl ROTH also offers reagents suitable for food analysis.
On the following pages, you will find the determination of
• Nitrogen according to Kjeldahl
and the determination of the
• Iodine value
• Acid value
• Peroxide value
• Saponification value
as well as other determining factors such as
• Hydroxyl value
• Fluoride ions
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.
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.
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.
|Assay (V/V)||95,1-96,9 %|
|Acid or alkaline react. substances||complies|
|Density (d 20 °C/20 °C)||0,805-0,812|
|Acetaldehyde and acetal||≤0,001 %|
|Evaporation residue||≤0,0025 %|
|Sum of other impurities||≤0,03 %|
|Disregard limit||≤0,0009 %|
|Prices include german tax on alcohol.|