Azo Violet Indicator , Alcohol solution 0.1%(W/V) , 74-39-5

Synonym(s):
4-(4-Nitrophenylazo)-resorcinol;Azoviolet;Magneson I

CAS NO.：74-39-5

Empirical Formula: C12H9N3O4

Molecular Weight: 259.22

MDL number: MFCD00007310

EINECS: 200-808-5

PRODUCT Properties

• 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
• Water Solubility: Soluble in dilute sodium hydroxide. Insoluble in water.
• Merck: 14,5695
• BRN: 674709
• Stability: Stable. Incompatible with strong oxidizing agents, strong bases.
• CAS DataBase Reference: 74-39-5(CAS DataBase Reference)
• EPA Substance Registry System: 1,3-Benzenediol, 4-[(4-nitrophenyl)azo]- (74-39-5)

Description and 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).

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H315-H319-H335
• Precautionary statements: P261-P280a-P304+P340-P305+P351+P338-P405-P501a
• Hazard Codes: Xi
• Risk Statements: 36/38
• Safety Statements: 26-36
• WGK Germany: 3
• RTECS: VH2810000
• TSCA: Yes
• HS Code: 29270000