Molecular Formula | C16H12ClN2NaO9S2 |
Molar Mass | 498.84 |
Density | 1.756[at 20℃] |
Water Solubility | 26.62g/L at 20℃ |
Appearance | Powder |
Color | Dark green to Dark red to Black |
pKa | pK1:7.56;pK2:9.3;pK3:12.4 (25°C) |
Storage Condition | 2-8°C |
MDL | MFCD00003941 |
Physical and Chemical Properties | Blue and black with metallic luster powder. Soluble in water magenta, soluble in fibrinolytic, slightly soluble in ethanol. In concentrated sulfuric acid, it is dissolved in blue, and after dilution, it is magenta; In concentrated nitric acid, it is dissolved in Brown light red, and in the caustic soda solution, it is red light blue solution. The aqueous solution was magenta with concentrated hydrochloric acid and blue with concentrated sodium hydroxide. Copper and iron were encountered during dyeing, with great color and light change. Water solubility (80 C) 50g/L. |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36 - Irritating to the eyes |
Safety Description | S39 - Wear eye / face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
WGK Germany | 3 |
HS Code | 32041900 |
color index | 16680 |
LogP | -1.853 at 20℃ |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | used for wool, silk and other fabrics, and also used for coloring aluminum oxide. Good dyeing fastness, mainly used for dyeing navy blue. The main disadvantage is poor reproducibility, and the color of large and small samples is often not easy to achieve consistency. Generally, small samples are light and large samples are deep, and the base is more obvious when dyed in deep and thick colors. Not suitable for color matching. |
production method | after diazotization of 4-chloro-o-aminophenol, it is coupled with chromotropic acid (I. e. 1, 8-dihydroxynaphthalene-3-6 disulfonic acid), and then through salting out, filtration, drying and other processing processes, the product is prepared. The dyeing year of this product on wool is 6-7 grade in sunlight, 5 grade in soaping, cooking and perspiration, and 4-5 grade in carbonization. Raw material consumption (kg/t)4-chloro-o-aminophenol (95.5%) 165 chromotropic acid (50%) 410 sodium nitrite (96%) 80 hydrochloric acid (30%) 60 caustic soda (95%) 80 soda ash (95%) 305 calcium oxide (96%) 90 |