4-((2-하이드록시-1-나프탈렌일)아조)벤젠설폰산모노나트륨염;오렌지II;4-((2-하이드록시-1-나프탈렌일)아조)벤젠술폰산모노나트륨염;4-((2-하;C.I.애시드오렌지7;등색205호;4-((2-하이드록시-1-나프탈렌일)아조)벤젠설폰산모노나트륨염(4-((2-HYDROXY-1-NAPHTHAL...;C.I. 애시드 오렌지 7;p-(2-하이드록시-1-나프틸아조)벤젠설포닉 산, 나트륨 염;솔라 오렌지 울 오렌지 A;오렌지 2 나트륨 염;페르시안 오렌지 레이크
상품명:
Acid Orange 7
동의어(영문):
Ao 7;15510;ORANGE1;CI 4600;OrangeⅡ;ORANGE I;CI 14600;orangeya;orangeyz;ORANGE 4
4-((2-하이드록시-1-나프탈렌일)아조)벤젠설폰산 모노나트륨 염 C화학적 특성, 용도, 생산
화학적 성질
Orange-red powder
정의
ChEBI: Acid orange 7 is a member of naphthalenes. Orange allergenic extract is used in allergenic testing.
제조 방법
Acid Orange 7, commonly known as acidic orange II. 4-Aminobenzenesulfonic acid diazo, and Naphthalen-2-ol coupling. It is produced by azo coupling of β-naphthol and diazonium derivative of sulfanilic acid.
Purification Methods
Purification is as for Orange I. Its solubility in H2O is 40g/L at 25o. [Müller et al. Helv Chim Acta 35 2579 1952.] Also purify it by extracting it with a small volume of cold water, then crystallising it by dissolving in boiling water, cooling to ca 80o, adding two volumes of EtOH and cooling. When cold, the precipitate is filtered off, washed with a little EtOH and dried in air. It can be salted out from aqueous solution with sodium acetate, then repeatedly extracted with EtOH. Meggy and Sims [J Chem Soc 2940 1956], after crystallising the sodium salt twice from water, dissolved it in cold water (11mL/g) and added conc HCl to precipitate the acid dye which was separated by centrifugation, redissolved and again precipitated with acid. After washing the precipitate three times with 0.5M acid, it was dried over NaOH, recrystallised twice from absolute EtOH, washed with a little Et2O, dried over NaOH and stored over conc H2SO4 in the dark. It can then be converted to the pure salt with the calculated amount of NaOH or Na2CO3. [Beilstein 16 IV 408.]
