Eriochrome Black T CAS 1787-61-7 - Imagen 2

Eriochrome Black T CAS 1787-61-7 - Imagen 3

Eriochrome Black T CAS 1787-61-7 - Imagen 4

Eriochrome Negro T CAS 1787-61-7

CAS:1787-61-7
MF:C20H12N3NaO7S
MW:461.38
EINECS:217-250-3
Sinónimos:1-naphthalenesulfonicacid,3-hidroxi-4-((1-hidroxi-2-naftalenil)azo)-7-nitro; 1-naphthalenesulfonicacid,3-hidroxi-4-[(1-hidroxi-2-naftalenil)azo]-7-nitro

¿Qué es Eriochrome Negro 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.

Eriochrome Black T (also known as Mordant Black 11, EBT dye) is a widely used complexometric indicator and azo dye with excellent metal-ion binding properties. It is commonly used in EDTA titration for water hardness testing, textile dyeing, ceramics and construction materials coloration, and biological reagent manufacturing.

As a trusted Eriochrome Black T supplier, we provide high-purity analytical grade and industrial grade products with strict QC control and stable global supply.

Especificación

Elemento	Especificación
PH	3.7 (10 g/l, H2O, 20℃)
El índice de color	14645
Acidez coeficiente (pKa)	pK1:6.3;pK2:11.55 (25°C)
Densidad	1.109 g/mL a 25 °C
Merck	14,3667
BRN	4121162

Eriochrome Black T Uses

1. Water Hardness Testing & EDTA Titrations

Eriochrome Black T is widely recognized as the standard indicator for determining calcium and magnesium hardness in water using EDTA titration. It delivers precise color transition and is essential for municipal water quality labs, boiler water analysis, and industrial water treatment monitoring.

2. Textile Dyeing

Eriochrome Black T can function as a mordant dye for natural fibers such as wool, cotton, and silk. It provides deep, stable black to navy shades and is favored in specialty textile labs and material R&D centers requiring advanced color effect and metal-ion reactive dye behavior.

3. Ceramic & Construction Materials Coloring

This dye is used as a pigment for ceramic glazes and sometimes pigment formulations in cement-based materials. It delivers consistent dark coloration and is applied in ceramic decorative coatings, tile production R&D, and experimental building-material pigment systems.

4. Biological Experiments & Reagent Manufacturing

Eriochrome Black T is used in metal-binding biochemical experiments, especially for studying ion-transport and enzyme mechanisms in academic labs. It is also a raw material for biological reagent manufacturers producing EDTA-based detection kits, indicator solutions, and laboratory buffer systems.