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Molecular Formula: C20H12N3NaO7S
Molecular Weight: 461.38
EINECS: 1787-61-7
Purity: 97% Min.
Package: 5 g / 25 g / 1 kg / 25 kg
Introduction
Chrome black T indicator, also known as Mordant Black 11, alias eletrochrome black T indicator, scientific name 1-(1-hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfon Sodium salt is a comprehensive indicator for the determination of barium, cadmium, indium, magnesium, manganese, calcium, lead, scandium, strontium, zinc, zirconium, etc. The chromium 365betÓéÀÖbook black T indicator is also used as the indicator when determining the total hardness (total amount of calcium and magnesium ions) of the water sample. When we prepared the chrome black T indicator in accordance with the drinking water hygiene standard 2001, we found that: 9.1.3.6 of which only uses 95% ethanol to dissolve the chrome black T indicator and dilute it to 100ml. The resulting indicator is water sample and pure water. The verification solutions are all dark purple-red, and there is no change in the color of the titration end point.
SPECIFICATION OF CAS: 1787-61-7 Eriochrome Black T
ITEMS | SPECIFICATION |
Colour Index | 14645 |
Storage temp. | Room temp |
Solubility | 50g/l |
Merck | 14,3667 |
Fp | 185 ¡ãC |
form | Powder/Solid |
Water Solubility | 50 g/L (20 oC) |
Density | 1.109 g/mL at 25 ¡ãC |
Stability | Stable. Incompatible with strong oxidizing agents, strong reducing agents. |
Color | Brownish-black to black |
Specific Gravity | 1.109 |
pka | pK1 |
EPA Substance Registry System | C.I. Mordant Black 11, monosodium salt (1787-61-7) |
BRN | 4121162 |
PH | 3.7 (10g/l, H2O, 20¡æ) |
CAS DataBase Reference | 1787-61-7(CAS DataBase Reference) |
Odor | Odorless |
Production of CAS: 1787-61-7 Eriochrome Black T
Coupling between 6-nitro-1,2,4-acid oxygen body (ie 6-nitro-2-hydroxy-1-diazonaphthalene-4-sulfonic acid) and 1-naphthol, after salting out, The product is obtained by the flaky process such as filtration and drying. The outside air of the product is dark brown uniform powder, the color is similar to the standard product (blue gray ¡ú blue black), the intensity is 100 (min) of the standard product, the moisture content is ¡Ü5%, the water-insoluble impurity content is ¡Ü1%, and the fineness ( The content of the residue after passing the 80 mesh sieve)¡Ü5%, the dyeing fastness on wool meets the standard product (light fastness level 7, soaping, water immersion, perspiration, cooking, etc. brown fastness, carbonization, ironing, etc. The fastnesses such as dry cleaning and dry cleaning are all grade 4-5, and the dry rubbing fastness is grade 3-4). Raw material consumption (kg/t) 6-nitro-1,2,4-acid oxygen body (100%) 500 naphthol (100%) 255 caustic soda (100%) 255 soda ash (industrial) 215 hydrochloric acid (31%) 675 refined salt 450Hot Tags: cas 1787-61-7 | eriochrome black t, China, manufacturers, in stock, free sample, high quality, low price, 4 Propylphenylacetylene, CAS 474707 30 7, CAS 111158 11 3, 1 Naphthalenecarbohydrazide, CAS 355 80 6, 1 Ethyl 4 piperidone
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