Eriochrome Black T CAS 1787-61-7
Eriochrome Black T indicator, also known as mordye black 11, alias Elai Chrome black T indicator, scientific name 1-(1-hydroxy-2-naphthol azo) -6-nitro-2-naphthol - 4-sulfonate sodium salt, is a comprehensive indicator for the determination of barium, cadmium, indium, magnesium, manganese, calcium, lead, scandium, strontium, zinc, zirconium, etc. The determination of the total hardness of the water sample (the total amount of calcium and magnesium ions) is also used as an indicator of chromium Chemicalbook black T indicator. When we prepared the chrome black T indicator according to the sanitary Code for Drinking Water 2001, we found that in 9.1.3.6, only 95% ethanol was used to dissolve the chrome black T indicator and dilute it to 100ml, so that the obtained indicator was dark purple red with the water sample and the pure water verification solution respectively, and the color of the titration end point could not be changed.
| Item | Specification |
| PH | 3.7 (10g/l, H2O, 20℃) |
| Colour index | 14645 |
| Acidity coefficient (pKa) | pK1:6.3;pK2:11.55 (25°C) |
| Density | 1.109 g/mL at 25 °C |
| Merck | 14,3667 |
| BRN | 4121162 |
Eriochrome Black T is mainly used for dyeing and printing wool fabrics, can also be used for the beam color of silk, nylon and other textiles, can also be used for fur dyeing, pure products can be used as an indicator. Eriochrome Black T can be used for the determination of water hardness indicators, complexing indicators, determination of calcium, magnesium, barium, indium, manganese, lead, scandium, strontium, zinc and zirconium, for the dyeing of top, wool and all kinds of wool fabrics, can also be used for the dyeing of nylon.
25kgs/drum, 9tons/20’container
25kgs/bag, 20tons/20’container
Eriochrome Black T CAS 1787-61-7
Eriochrome Black T CAS 1787-61-7
