1.01369

Neutralrot (C.I. 50040)

pH indicator and for microbiology

• Synonym(e): Neutralrot (C.I. 50040)
• Empirische Formel (Hill-System): C₁₅H₁₇ClN₄
• CAS-Nummer: 553-24-2
• Molekulargewicht: 288.78
• MDL-Nummer: MFCD00012651
• UNSPSC-Code: 41116130
• EG-Index-Nummer: 209-035-8
• NACRES: NB.21

Eigenschaften

• product name: Neutralrot (C.I. 50040), indicator and for microbiology
• Qualitätsniveau: 200
• Form: solid
• Zusammensetzung: dye content, ≥75% spectrophotometric assay
• Verlust: ≤18% loss on drying, 110°C
• pH-Wert: 3.1 (20 °C, 10 g/L in H₂O)
• Löslichkeit: 50 g/L
• Schüttdichte: 350‑500 kg/m³
• Amax: 452-455 nm (buffer pH 8.0); 514-519 nm (buffer pH 6.8)
• λmax: 540-543 nm at 50% in ethanol
• Lagertemp.: 2-30°C
• InChI: 1S/C15H16N4.ClH/c1-9-6-13-15(8-11(9)16)18-14-7-10(19(2)3)4-5-12(14)17-13;/h4-8H,16H2,1-3H3;1H
• InChIKey: PGSADBUBUOPOJS-UHFFFAOYSA-N

Beschreibung

Anwendung

• Smartphone-based sensing and in vivo and in vitro imaging of Mn(VII) based on nitrogen-doped red fluorescent carbon dots.: Li et al. present a novel smartphone-based sensor system utilizing nitrogen-doped red fluorescent carbon dots for detecting Mn(VII) ions. The study leverages the red fluorescence properties of these carbon dots for in vivo and in vitro imaging, enhancing detection accuracy and application in environmental monitoring and biological imaging (Li et al., 2024).


• A "2-in-1" Bioanalytical System Based on Nanocomposite Conductive Polymers for Early Detection of Surface Water Pollution.: Kharkova et al. develop a bioanalytical system integrating nanocomposite conductive polymers to detect surface water pollution. Neutral red is used as an indicator for the electrochemical detection of pollutants, demonstrating the system′s potential for early and accurate environmental monitoring (Kharkova et al., 2024).


• Programable sewage-cleaning technology: Regenerating chitosan biofilms with anti-bacterial capacity via self-purification of water pollutants.: Wu et al. explore a programmable sewage-cleaning technology that regenerates chitosan biofilms with antibacterial properties. Neutral red plays a critical role in evaluating the biofilms′ effectiveness in self-purification processes, offering insights into sustainable wastewater management (Wu et al., 2024).


• Characteristics and adsorption behavior of typical microplastics in long-term accelerated weathering simulation.: Yu et al. examine the characteristics and adsorption behavior of microplastics under long-term weathering. Neutral red staining is employed to study the surface interactions and degradation patterns of microplastics, providing valuable data for environmental impact assessments (Yu et al., 2024).

Hinweis zur Analyse

Farbstoffgehalt (spektrophotometrisch): ≥ 75 %
Identität (UV/VIS-Spektrum): entspricht
Übergangsbereich: pH 6,8 – pH 8,0 Violett rot – orange-gelb
Absorptionsmaximum λ_max. (Ethanol 50 %): 540–543 nm
Absorptionsmaximum λ 1 (Puffer-pH-Wert 6,8): 514–519 nm
Absorptionsmaximum λ 2 (Puffer-pH-Wert 8,0): 452–455 nm
Spez. Absorptionsgrad A 1%/1cm (λ2_max.; 0,005 g/L; Ethanol 50 %): 1180–1610 nm
Spez. Absorptionsgrad A 1 %/1 cm (λ1_max.; 0,015 g/L; Puffer-pH-Wert 6,8; berechnet auf getrocknete Substanz): 425–575 nm
Spez. Absorptionsgrad A 1 %/1 cm (λ2_max.; 0,015 g/L; Puffer-pH-Wert 8,0; berechnet auf getrocknete Substanz): 395–535
TLC-Test: entspricht
Trocknungsverlust (110 °C): ≤ 18 %
Eignung für Mikrobiologie: entspricht

Sicherheitshinweise

• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable