rubiadin

[ Eng.rubiad ( ip ) in.] Chem.: C16H1405. A substance produced, together with glucose, by the action of alkalies on rubiacin. It crystallizes in yellow needles or rectangular plates, which are slightly soluble in alcohol. With strong sulphuric acid it forms a yellow solution. and aqueous ammonia di olves it, at the boiling heat, with blood-red color. ru-bi-ad-1-pin, s. [Mod. Lat. rubia; English ( a ) dip ( ose ), and- in ( Chem. ).] Chemistry: C30H2405(7). One of the compounds formed by the fermentation of madder with ery throzym. After the removal of alizarin, rubiretin, rubiafin, ., it is obtained, along with rubiagin, from which it is separated by solution in cold alcohol. It is a yellowish-brown fatty substance, soluble in alcohol and alkalies, the latter forming a blood-red soapy liquid.