| Identification | More | [Name]
4-(4-NITROPHENYLAZO)RESORCINOL | [CAS]
74-39-5 | [Synonyms]
4-(4'-NITROPHENYLAZO)-RESORCINOL
4-(4-NITROPHENYLAZO)RESORCINOL
4-(P-NITROBENZENEAZO)RESORCINOL
4-(P-NITROPHENYLAZO)ORCINOL
4-(P-NITROPHENYLAZO)RESORCINOL
AZO VIOLET
AZOVIOLET BENZENE
LABOTEST-BB LT00455004
MAGNESON
MAGNESON I
P-NITROBENZENEAZORESORCINOL
TIMTEC-BB SBB008851
1,3-Benzenediol,4-[(4-nitrophenyl)azo]-
3-Benzenediol,4-[(4-nitrophenyl)azo]-1
4-((4-nitrophenyl)azo)-3-benzenediol
4-((p-nitrophenyl)azo)-resorcino
4-[(4-Nitrophenyl)azo]-1,3-benzenediol
4-[(4-nitrophenyl)azo]-3-benzenediol
p-diazviolet
MagnesonⅠ | [EINECS(EC#)]
200-808-5 | [Molecular Formula]
C12H9N3O4 | [MDL Number]
MFCD00007310 | [Molecular Weight]
259.22 | [MOL File]
74-39-5.mol |
| Chemical Properties | Back Directory | [Appearance]
dark red to brown crystalline powder | [Melting point ]
195-200 °C (dec.)(lit.) | [Boiling point ]
402.47°C (rough estimate) | [density ]
1.3450 (rough estimate) | [refractive index ]
1.5700 (estimate) | [storage temp. ]
Store below +30°C. | [form ]
Powder | [pka]
8.05±0.35(Predicted) | [color ]
Orange-red to red | [Odor]
Odorless | [Stability:]
Stable. Incompatible with strong oxidizing agents, strong bases. | [Water Solubility ]
Soluble in dilute sodium hydroxide. Insoluble in water. | [λmax]
432 nm | [Merck ]
14,5695 | [BRN ]
674709 | [CAS DataBase Reference]
74-39-5(CAS DataBase Reference) | [EPA Substance Registry System]
1,3-Benzenediol, 4-[(4-nitrophenyl)azo]- (74-39-5) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/38:Irritating to eyes and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [RTECS ]
VH2810000
| [TSCA ]
Yes | [HS Code ]
29270000 |
| Hazard Information | Back Directory | [Chemical Properties]
dark red to brown crystalline powder | [Uses]
4-(4-Nitrophenyl)azoresorcinol is used for the detection of magnesium with which it yields a bright blue color in alkaline solution and it also used to determine molybdenum with which it forms a red-violet complex: Nikitina, Andrianova, C.A. 75, 136789v (1971).
| [Uses]
It is a derivitized resorcinol dye compound with an absorption maximum of 432 nm. Used as a pH indicator. | [Definition]
ChEBI: 4-(4-nitrophenylazo)resorcinol [74-39-5] is an azobenzene in which the phenyl rings are 4-nitro- and 2,4-dihydroxy-substituted respectively. It is a member of resorcinols, a C-nitro compound and a member of azobenzenes.
| [Biochem/physiol Actions]
4-(4-Nitrophenylazo)resorcinol is a pH indicator. | [Synthesis]
A solution of NaNO2 (1.035 g) in deionized water (15 mL) is slowly added to a solution of p-nitroaniline (2.07 g) in hydrochloric acid (2.5 mol/L, )
10 mL) in hydrochloric acid (2.5 mol/L, ). The solution is held at 0°C for 1 hour under vigorous mechanica | [Purification Methods]
Crystallise the dye from EtOH. [Beilstein 16 H 181, 16 IV 1266.] |
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