Titan yellow
| Names | |
|---|---|
| IUPAC name
Disodium 2,2'-[(1E)-triaz-1-ene-1,3-diyldi(4,1-phenylene)]bis(6-methyl-1,3-benzothiazole-7-sulfonate)
| |
| Other names
2,2'-[(diazoamino)di-p-phenylene]bis[6-methyl-7-benzothiazolesulfonic acid] disodium salt
C.I. 19540 C.I. Direct Yellow 9 Clayton Yellow Diazamine Golden Yellow T Thiazole yellow Thiazole Yellow G | |
| Properties | |
| C28H19N5Na2O6S4 | |
| Molar mass | 695.720 g/mol |
| Appearance | Light brown powder |
| Odor | Faint |
| Melting point | 250 °C (482 °F; 523 K) (decomposes) |
| Boiling point | Decomposes |
| 2.9 g/100 ml | |
| Vapor pressure | ~0 mmHg |
| Hazards | |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Titan yellow is an organic chemical compound, a triazene dye used as a stain and fluorescent or colorimetric indicator in microscopy, as well as acid-base indicator.
Contents
Properties
Chemical
Titan yellow can be used as an acid-base indicator, changing its color from yellow to red between pH 12 and pH 13. Its pH value is given as 5.1 at 10 g/l at 20 °C.
The compound displays sensitivity to light.[1]
Physical
Titan yellow is a yellowish or light brownish powder.
Availability
Titan yellow can be bought from chemical suppliers.
Preparation
Can be synthesized from 2-(p-aminophenyl)-6-methyl-7-benzothiazolesulfonic acid.[2]
Projects
- Fluorescent indicator
- Colorimetric indicator (especially for Mg)
- Acid-base indicator
Handling
Safety
Titan yellow is irritant. There is little data available regarding its toxicity.
Storage
In closed airtight bottles, away from acids, bases, light and oxidizers.
Disposal
Can be neutralized by safely destroying it with a strong oxidizing solution.
References
- ↑ https://www.chembk.com/en/chem/Titan%20Yellow
- ↑ Beilstein vol. 27, 2nd suppl, 509; F. J. Welcher, Organic Analytical Reagents vol. 4 (Van Nostrand, New York, 1948) p 391
