13698-89-0 Usage
General Description
1,5-diamino-4,8-dihydroxy-2-(4-methoxyphenyl)anthraquinone is a chemical compound also known as alizarin. It is a synthetic dye commonly used in the textile industry to produce red and orange colors. Alizarin has a complex chemical structure and is derived from the roots of the madder plant, which has been used as a dye for thousands of years. It has been historically used as a pigment in painting and as a biological stain for observing calcium deposits in tissues. Alizarin is also used in the production of lake pigments, which are insoluble colorants made by combining the dye with a metallic salt. Despite its widespread use, alizarin has been subjected to restrictions due to potential environmental and health concerns.
Check Digit Verification of cas no
The CAS Registry Mumber 13698-89-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,6,9 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 13698-89:
(7*1)+(6*3)+(5*6)+(4*9)+(3*8)+(2*8)+(1*9)=140
140 % 10 = 0
So 13698-89-0 is a valid CAS Registry Number.
InChI:InChI=1/C21H16N2O5/c1-28-10-4-2-9(3-5-10)11-8-14(25)17-18(19(11)23)21(27)16-13(24)7-6-12(22)15(16)20(17)26/h2-8,24-25H,22-23H2,1H3
13698-89-0Relevant articles and documents
ORDER PARAMETERS FOR ISOMERIC PHENYL SUBSTITUTED ANTHRAQUINONE DYES DISSOLVED IN NEMATIC LIQUID CRYSTALS MIXTURES - INFLUENCE OF THE HOST.
Cognard,Hieu Phan,Basturk
, p. 327 - 340 (2007/10/02)
Substitution of the anthraquinone ring system provided dyes suitable for guest-host applications. In general, one seeks to elongate the anthraquinonic system through a fourth ring. Different molecular structures have been proposed which all have similar ordering in the liquid crystalline host. Surprisingly, the 2-p-alkoxyphenyl substituted 1,5 dihydroxy-4, 8-diaminoanthraquinones have a higher order parameter in liquid crystalline mixtures of positive dielectric anisotropy made from cyano substituted moelcules. They lose this property in a system consisting of molecules without cyano groups at the terminii of the molecular axes. The properties of two isomeric substituted anthraquinone dyes in different hosts are compared in order to illustrate the considerable influence that dye-liquid crystal interactions may have on dye order parameter.
