CAS 1787-61-7

Eriochrome Black T

Description:

Eriochrome Black T, with the CAS number 1787-61-7, is a synthetic organic compound commonly used as a pH indicator and a complexometric indicator in titrations, particularly for determining metal ions such as calcium and magnesium. It appears as a dark blue or violet powder and is soluble in water, forming a red solution at acidic pH levels. The compound is characterized by its ability to form stable complexes with metal ions, which is crucial for its application in analytical chemistry. Eriochrome Black T has a molecular formula of C20H12N3NaO7S and features a sulfonic acid group that enhances its solubility in aqueous solutions. Its color change from blue to red as the pH shifts from alkaline to acidic makes it a valuable tool in various titrimetric analyses. However, it is important to handle this compound with care, as it may pose health risks if ingested or inhaled, and appropriate safety measures should be taken during its use in laboratory settings.

Formula: C₂₀H₁₃N₃O₇S·Na

InChI: InChI=1S/C20H13N3O7S.Na/c24-17-10-18(31(28,29)30)15-9-12(23(26)27)6-7-14(15)19(17)22-21-16-8-5-11-3-1-2-4-13(11)20(16)25;/h1-10,24-25H,(H,28,29,30);

InChI key: InChIKey=YUJFCGQWGATJPG-UHFFFAOYSA-N

SMILES: S(=O)(=O)(O)C=1C2=C(C(N=NC3=C(O)C4=C(C=C3)C=CC=C4)=C(O)C1)C=CC(N(=O)=O)=C2.[Na]

Synonyms:

• Erichrome Black T
• sodium 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitro-naphthalene-1-sulfonate
• Chromogene Black ET
• Eriochrome Balck T
• C.I. Mordant Black 11, monosodium salt (8CI)
• Mordant black 11
• Eriochrome Black T
• Eriochrome (R) black T
• 3-Hydroxy-4-(1-hydroxy-2-naphthylazo)-7-nitro-1-naphthalenesulfonic acid, sodium salt
• 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitro-4-naphthalenesulfonic acid, sodium salt
• C.I. Mordant Black 11, monosodium salt
• C.I.Mordant Black 11
• C.I. 14645
• C.I. Mordant Black 11 (VAN)
• 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitro-, monosodium salt
• sodium (4Z)-4-[(1-hydroxynaphthalen-2-yl)hydrazono]-7-nitro-3-oxo-3,4-dihydronaphthalene-1-sulfonate
• 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro-, sodium salt (1:1)
• Eriochrome Balck T250
• C.I. Mordant Black 11, monosodium salt
• Eriochrome black T supra
• Color index
• 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro-, monosodium salt
• sodium 3-hydroxy-4-[(E)-(1-hydroxynaphthalen-2-yl)diazenyl]-7-nitronaphthalene-1-sulfonate

Eriochrome Black T ACS

CAS: 1787-61-7

Formula: C₂₀H₁₂N₃NaO₇S

Color and Shape: Brown to Black, Powder

Molecular weight: 461.39

Ref: SR-40876

Eriochrome Black T (1:100 diluted with NaCl)

CAS: 1787-61-7

Formula: C₂₀H₁₂N₃NaO₇S

Color and Shape: Purple to Dark purple to Brown powder to crystal

Molecular weight: 461.38

Ref: 3B-E0487

Eriochrome Black T

CAS: 1787-61-7

Formula: C₂₀H₁₂N₃NaO₇S

Color and Shape: Black powder to crystaline

Molecular weight: 461.38

Ref: 3B-E0214

Eriochrome Black T

CAS: 1787-61-7

Eriochrome black T is used as an indicator in analytical chemistry. It is also used in the detection of rare earth metals. It finds application in dyeing and printing of wool fabric, dyeing of silk and nylon as well as in leather dyeing. It can be used in the spectrophotometric determination of diph

Formula: C₂₀H₁₂N₃NaO₇S

Color and Shape: Black, Crystals or powder or crystalline powder

Molecular weight: 461.38

Ref: 02-A17536

1-Naphthalenesulfonic acid,3-hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro-, monosodium salt

CAS: 1787-61-7

Formula: C₂₀H₁₃N₃NaO₇S

Color and Shape: Solid

Molecular weight: 462.3879

Ref: IN-DA00HZWD

Eriochrome Black T (C.I. 14645); ACS grade

CAS: 1787-61-7

Formula: C₂₀H₁₂N₃NaO₇S

Color and Shape: Very dark brown or black powder

Molecular weight: 461.39

Ref: 7W-GT1416

Eriochrome Black T (C.I. 14645)

CAS: 1787-61-7

Formula: C₂₀H₁₂N₃NaO₇S

Purity: 95 - 105 %

Color and Shape: Black crystalline powder

Molecular weight: 461.39

Ref: 7W-GT2024

Eriochrome Black T

CAS: 1787-61-7

Eriochrome Black T

Purity: IND

Molecular weight: 461.38g/mol

Ref: 54-OR1013110

Eriochrome black t

CAS: 1787-61-7

Formula: C₂₀H₁₂N₃NaO₇S

Color and Shape: Solid

Molecular weight: 461.38

Ref: 10-F047074

Mordant Black 11 (Technical Grade)

CAS: 1787-61-7

Applications Mordant black 11 is a dye potentially useful as a metal indicator. Dyes and metabolites.

Formula: C₂₀H₁₂N₃O₇S·Na

Color and Shape: Dark Brown To Black

Molecular weight: 461.38

Ref: TR-M635003

Eriochrome black T indicator (C.I. 14645), 1% solid

CAS: 1787-61-7

Purity: IND

Color and Shape: Solid

Molecular weight: 461.38

Ref: 10-F987448

Eriochrome Black T

CAS: 1787-61-7

Eriochrome Black T is a complexometric indicator. Eriochrome Black T is used in complexometric titrations.

Formula: C₂₀H₁₃N₃NaO₇S

Color and Shape: Black Powder

Molecular weight: 462.39

Ref: TM-T19901

Mordant black 11 - Technical

CAS: 1787-61-7

Mordant Black 11 is a water-soluble dye that is used in the treatment of wastewater. Mordant Black 11 binds to surface particles and enhances the removal of organic matter from wastewater. It has been shown to be effective for the treatment of human serum, which contains high levels of proteins and other macromolecules. Mordant Black 11 efficiently adsorbs onto the surface of these macromolecules, leading to a decrease in the amount of protein adsorbed on the surface. The kinetic data for this process have been obtained by electrochemical impedance spectroscopy (EIS) and by measuring changes in pH due to ionization. A magnesium salt is required for the synthesis of Mordant Black 11, as well as potassium dichromate or other chromium salts and fatty acids.

Formula: C₂₀H₁₂N₃NaO₇S

Purity: Min. 95%

Molecular weight: 461.38 g/mol

Ref: 3D-FM32792