Alizarine Yellow R
Title: Alizarine Yellow R
CAS Registry Number: 2243-76-7
CAS Name: 2-Hydroxy-5-[(4-nitrophenyl)azo]benzoic acid
Additional Names: 5-(p-nitrophenylazo)salicylic acid; p-nitrobenzeneazosalicylic acid; Alizarine Yellow RW; C.I. Mordant Orange 1; C.I. 14030
Molecular Formula: C13H9N3O5
Molecular Weight: 287.23
Percent Composition: C 54.36%, H 3.16%, N 14.63%, O 27.85%
Literature References: Prepd by coupling diazotized p-nitroaniline with salicylic acid: Armento, US 2746955 (1956 to General Aniline and Film); Colour Index vol. 4 (3rd ed., 1971) p 4058.
Properties: Orange-brown needles from dil glacial acetic acid, dec 253-254°. Sol in water, alc; slightly sol in acetone, Cellosolve; practically insol in other org solvents.
 
Derivative Type: Sodium salt
Additional Names: Mordant Yellow 3R
Molecular Formula: C13H8N3NaO5
Molecular Weight: 309.21
Percent Composition: C 50.50%, H 2.61%, N 13.59%, Na 7.44%, O 25.87%
Properties: Brownish yellow powder. Sol in water.
 
Use: Sodium salt used as indicator in 0.1% aq soln pH: yellow to red, range 10.2 to 12.0.

Others monographs:
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EnilconazoleEthoxazeneDynelTribromoethanol
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Thioacetic AcidDigitoxinPinacidilAmmonium Hexafluorosilicate
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