4-(4-Nitrophénylazo)résorcinol 90% (teneur en colorant), Sigma-Aldrich®
Marques : SIGMA ALDRICH MICROSCOPYTotal Evaluation: 0
Moyenne des Notes : 0.0 sur 5
Synonyme(s):
4-((4-Nitrophenyl)diazenyl)benzene-1,3-diol, Azoviolet, Azo Violet, Magneson I
M-Clarity™ (Niveau de Qualité) = MQ200
4-(4-Nitrophenylazo) resorcinol, also known as azo violet or magneson I, is a red colored powder. It functions as a spot test reagent and forms blue lake on reaction with Mg(OH)₂ in alkaline solution. It is mainly used for determining the presence of magnesium in the solution. 4-(4-Nitrophenylazo)resorcinol is a pH indicator.
Formule:
C₁₂H₉N₃O₄ Poids moléculaire: 259.22 g/mol Point de fusion: 195...200 °C (déc., lit.) |
Numéro MDL:
MFCD00007310 Numéro CAS: 74-39-5 EINECS: 200-808-5 |
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Résultats des tests de spécification
Appearance (colour) | Orange to very dark orange and red to very dark red and dark red-orange and very dark red-brown |
Appearance (form) | Powder |
Infrared spectrum | Conforms to structure |
Wavelength | 439 - 445 nm |
Extinction coefficient, c = 0.005 g/L in methanol + 1 ml 0.1 N NaOH | ≥37000 |
Carbon | 49.5 - 61.7% |
Nitrogen | 14.4 - 18.0% |
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