Nitrazine yellow , Indicator level , 5423-07-4

Synonym(s):
2-(2,4-Dinitrophenylazo)-1-hydroxynaphthalene-3,6-disulfonic acid disodium salt;2-(2,4-Dinitrophenylazo)naphthol-3,6-disulfonic acid disodium salt;Nitrazol Yellow

CAS NO.：5423-07-4

Empirical Formula: C16H11N4NaO11S2

Molecular Weight: 522.39

MDL number: MFCD00003938

EINECS: 226-549-8

PRODUCT Properties

• Melting point: >250°C
• storage temp.: 2-8°C
• solubility: Solubility Soluble in water, acetic acid ethanol
• Colour Index: 14890
• form: Powder
• color: Brown to yellow to orange
• PH Range: Bright yellow (6.0) to bright blue (7.2)
• Water Solubility: Dissolve in water at 1mg/ml
• λmax: 586nm
• ε(extinction coefficient): ≥35000 at 587-591nm in 0.1 M NaOH at 0.01g/L
• Major Application: Sensors, display devices, sol-gel matrix, electrorheological materials, diesel feuls/kerosines, detergent, fabric softner, food storage, method for identifying fresh & stale rice, in dialysis solution, screening of NAD-binding, monitoring secreted body fluids, lymph node, diagnostic pads, vaginal infection test method, assay for esterolyticenzyme activity, detecting pathogenic bacteria, diagnosis of bacterial vaginosis, detecting dysfunctional pregnancy, drugs screening
• CAS DataBase Reference: 5423-07-4(CAS DataBase Reference)
• EPA Substance Registry System: 2,7-Naphthalenedisulfonic acid, 3-[(2,4-dinitrophenyl)azo]-4-hydroxy-, disodium salt (5423-07-4)

Description and Uses

Nitrazine Yellow is a pH-sensitive azo dye. It changes color from yellow to blue in pH range 6.0–7.0 and is widely used in microscopy. Dyes and metabolites.

Safety

• Symbol(GHS): GHS07,GHS08
• Signal word: Danger
• Hazard statements: H317-H340-H413
• Precautionary statements: P501-P261-P273-P272-P202-P201-P280-P302+P352-P308+P313-P362+P364-P333+P313-P405
• Hazard Codes: F
• Risk Statements: 5
• Safety Statements: 15-22-24/25
• WGK Germany: 3
• TSCA: Yes
• HS Code: 29270000