Thiazole yellow

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Structural formula
Structural formula thiazole yellow
General
Surname Thiazole yellow
other names
  • Disodium 6-methyl-2- [4- [2- [4- (6-methyl-7-sulfonato-1,3-benzothiazol-2-yl) phenyl] iminohydrazinyl] phenyl] -1,3-benzothiazole-7 sulfonate ( IUPAC )
  • Titanium yellow
  • Mimosa
  • Clayton yellow
  • CI 19540
  • CI Direct Yellow 9
Molecular formula C 28 H 19 N 5 Na 2 O 6 S 4
Brief description

yellowish brown powder

External identifiers / databases
CAS number 1829-00-1
EC number 217-377-4
ECHA InfoCard 100,015,798
PubChem 73217
ChemSpider 65972
Wikidata Q906072
properties
Molar mass 695.72 g mol −1
solubility
safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Titan yellow , and titanium yellow , is a yellow-brown dye , the substance group of triazenes belongs and as fluorescence - indicator , acid-base indicator and as a reagent to magnesium is used.

The metal titanium is not contained in this substance (see however titanium white ).

properties

At a pH between 12.0 and 13.0, the yellow changes to red (or brown-yellow).

use

The dye is used as a fluorescent indicator in microscopic stains and a reagent for the detection of magnesium (light red precipitate) in body fluids, and also as a pH indicator. Nickel - zinc - manganese - and cobalt - ions also yield colored solutions and optionally disturb the detection of magnesium. The presence of calcium ions intensifies the color of the color lake formed, which must be taken into account when assessing the detection of magnesium ions

Individual evidence

  1. ↑ a b c d e entry on thiazole yellow. In: Römpp Online . Georg Thieme Verlag, accessed on May 7, 2014.
  2. ↑ Data sheet Thiazole Yellow G from Sigma-Aldrich , accessed on May 15, 2017 ( PDF ).