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What is the melting point of alpha naphthol?
The melting point of alpha naphthol is 95-96 oC.
What kind of compound is a naphthol?
This compound is organic, aromatic, fused aromatic, and hydroxylic, among other descriptions.
Why you dissolve absolute ethanol in 5 percent alpha naphthol for the Molisch test?
There is an answer in 'Related links', clickable just below this answer page [cf. Molisch's test for carbohydrates).But there is no conformation to use absolute alcohol (100%), neither of 5% a-naphtol.They use normal 96% alcohol and a-naphtol 2 g per 20 mL (=10%).The site is in German language, but you'll find an 'English language' link below the 'disclaimer'.
What are the reagents used in voges-proskauer tests?
The reagents commonly used in the Voges-Proskauer test are alpha-naphthol and 40% potassium hydroxide (KOH). These reagents are added to the bacterial culture after the addition of the Barritt's reagent (a mixture of 5% alpha-naphthol and 40% KOH) to detect the production of acetoin, which is indicative of certain bacterial species such as Enterobacter and Klebsiella.
Is a-naphthol a solid or liquid at room temperature?
At 20 oC it is solid
What kind of compound is a-naphthol?
A-naphthol is a type of organic compound known as a naphthol, which is a phenol derivative. It consists of a naphthalene ring structure with a hydroxyl group attached at the alpha position. A-naphthol is commonly used in the production of dyes and pigments.
What is the melting point of alpha naphthol?
The melting point of alpha naphthol is 95-96 oC.
What is the difference between alpha and beta naphthol?
alpha naphthol with CCl4(carbon tetrachloride) gives blue colour whereas beta naphthol with CCl4 gives no colour. that is the distinction test between alpha and beta naphthol.
What kind of compound is a naphthol?
This compound is organic, aromatic, fused aromatic, and hydroxylic, among other descriptions.
What is the resonance of alpha naphthol?
The resonance structure of α-naphthol involves delocalization of electrons within the aromatic ring through the oxygen atom. This results in stabilization of the molecule due to electron delocalization, making the compound more stable.
Is 2-naphthol soluble in HCl?
No, 2-naphthol is not soluble in hydrochloric acid (HCl) because it is a nonpolar compound and HCl is a polar solvent.
Why fructose give intense violet coloration with alpha naphthol in acidic media?
when it is kept in acid media,the acid hydrolyses the glycosidic bond and yields monosaccharide to give furfural and its derivatives ,these products when react with alpha naphthol (sulphonated) they give a purple complex
Is 2-naphthol soluble in ethanol?
yes, it is much more soluble in ethanol than in water.
Is phenyl azo beta naphthol saturated or not?
Phenyl azo beta naphthol is not a saturated compound. It contains multiple double bonds in its molecular structure, which makes it unsaturated.
Why you dissolve absolute ethanol in 5 percent alpha naphthol for the Molisch test?
There is an answer in 'Related links', clickable just below this answer page [cf. Molisch's test for carbohydrates).But there is no conformation to use absolute alcohol (100%), neither of 5% a-naphtol.They use normal 96% alcohol and a-naphtol 2 g per 20 mL (=10%).The site is in German language, but you'll find an 'English language' link below the 'disclaimer'.
What are the reagents used in voges-proskauer tests?
The reagents commonly used in the Voges-Proskauer test are alpha-naphthol and 40% potassium hydroxide (KOH). These reagents are added to the bacterial culture after the addition of the Barritt's reagent (a mixture of 5% alpha-naphthol and 40% KOH) to detect the production of acetoin, which is indicative of certain bacterial species such as Enterobacter and Klebsiella.
How could you seperate benzophenone from a-naphthol?
The melting point for lauric acid is about 45 degrees while it is 121 degrees for naphthol. So, in a mixture repeated cycles of slow warming and cooling should separate out lauric acid from naphthol. You can improve the efficiency by adding a dash of slightly acidic 70% isopropyl alcohol. This will deprotonate the lauric acid while maintaining the proton on naphthol during this process to enhance separation and purification of the two compounds. You could also flat-out distill the two products by maintaining the temperature of the solution at the boiling point of lauric acid to separate it from naphthol.
