How is anthraquinone made?
It is prepared commercially by oxidation of anthracene or condensation of benzene and phthalic anhydride, followed by dehydration of the condensation product. The anthraquinones occur widely in plants but in only a few animals.
What is borntrager reaction?
The alkalization reaction to obtain the phenolate ion can be done by employing weak alkalis, such as ammonium hydroxide. This reaction is known as the Bornträger reaction  and is widely used for the identification of anthraquinones in plant extracts and powders.
Is Quinizarin soluble?
The solubility of quinizarin FI and FII in the pure organic solvents used in the present work is below 2.5% by weight and decreases in the order: toluene, acetone, acetic acid, acetonitrile and n-butanol.
What foods contain anthraquinone?
Introduction. Anthraquinones (AQs) are found in rhubarb root, Senna leaf and pod, Cascara, Buckhorn, and Aloe, and they are widely used in laxative preparations.
What is the Colour of anthraquinone?
15.4 Anthraquinone dyes. Anthraquinone acid dyes are rich in violet through blue to green complementing the azo dyes. They have very good light fastness.
What colour is legal testing?
deep red colour
2. Legal test: To the drug, add few ml of pyridine and 2drops of nitroprusside and a drop of 20% sodium hydroxide solution. A deep red colour is produced.
What is Quinizarine?
Quinizarine Green SS, also called Solvent Green 3 is an anthraquinone derivative. It is a black powder that is soluble in polar organic solvents, but insoluble in water. It is used as a dye for adding greenish coloring to cosmetics and medications. It is used in some colored smoke formulations.
What is the molecular weight of dihydroxyanthraquinone?
1,4-Dihydroxyanthraquinone PubChem CID 6688 Synonyms Quinizarin 1,4-Dihydroxyanthraquinone 81 Molecular Weight 240.21 Date s Modify 2021-07-03 Create 2005-03-26
What are the dihydroxy derivatives of anthraquinone?
There are also many dihydroxy derivatives of other anthraquinones, such as 1,2-anthraquinone, 1,4-anthraquinone, and 2,6-anthraquinone. ^ a bWahl, Andre; Atack, F. W. (1919).
What are the isomers of Dihyroxyantraquinones?
Dihyroxyantraquinones have been studied since the early 1900s, and include some compounds of historical and current importance. The isomers differ in the position of the hydroxyl groups, and of the carbonyl oxygens (=O) of the underlying anthraquinone.
What is the function of dihydroxy-9-10-anthraquinone?
The dihydroxy-9,10-anthraquinone functional group occurs widely in natural products, and is an important feature of the anthracycline antitumour antibiotics. In particular, 1,8-Dihydroxy-9,10-anthraquinone is the precursor for the important topical antipsoriatic drug anthralin, 1,8-dihydroxy-9-anthrone,