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Quinaldine red

pH indicator, Reag. Ph Eur

Synonym(s):

Quinaldine red

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About This Item

Empirical Formula (Hill Notation):
C21H23IN2
CAS Number:
117-92-0
Molecular Weight:
430.33
MDL number:
MFCD00011968
UNSPSC Code:
12352107
EC Index Number:
204-221-5
NACRES:
NA.21

product name

Quinaldine red, indicator Reag. Ph Eur

agency

reag. Ph. Eur.

Quality Level

200

form

solid

impurities

≤5% Water (Karl Fischer)

visual transition interval

1.4-3.2, colorless to red

mp

240 °C (decomposition)

bulk density

290 kg/m3

λmax

528-533 nm in acetic acid

storage temp.

2-30°C

InChI

1S/C21H23N2.HI/c1-4-23-20(16-12-18-7-5-6-8-21(18)23)15-11-17-9-13-19(14-10-17)22(2)3;/h5-16H,4H2,1-3H3;1H/q+1;/p-1

InChI key

JOLANDVPGMEGLK-UHFFFAOYSA-M

Related Categories

Application


  • Quinaldine Red as a fluorescent probe for determining the melting temperature (T(m)) of proteins: a simple, rapid and high-throughput assay.: This study presents Quinaldine Red as an effective fluorescent probe for determining the melting temperatures of proteins, offering a rapid and high-throughput method suitable for broad applications in biochemical research (Das et al., 2024).

  • Red emitting fluorogenic dye as an efficient turn-on probe for milk allergen.: Explores the use of a red-emitting fluorogenic dye, likely involving Quinaldine Red, as a turn-on probe for detecting milk allergens, highlighting its potential in food safety and allergen detection (Chakraborty, 2022).

  • A rapid, naked-eye detection of hypochlorite and bisulfite using a robust and highly-photostable indicator dye Quinaldine Red in aqueous medium.: Describes the application of Quinaldine Red for the visual detection of chemicals like hypochlorite and bisulfite, underlining its utility in environmental monitoring and chemical safety (Dutta et al., 2018).

  • Self-Assembly and Formation of Chromonic Liquid Crystals from the Dyes Quinaldine Red Acetate and Pyronin Y.: Investigates the self-assembly properties of Quinaldine Red and its application in forming chromonic liquid crystals, demonstrating its potential in material science and nanotechnology (Magana et al., 2016).

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Transition range: pH 1.4 - pH 3.2 colourless - red
Absorption maximum λmax. (Acetic acid): 528 - 533 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; acetic acid glacial; calculated on anhydrous substance): 1150 - 1480
Water (according to Karl Fischer): ≤ 5 %

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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