What is the molecular structure of eriochrome black T indicator?
Eriochrome black t
| PubChem CID | 135465089 |
|---|---|
| Chemical Safety | Laboratory Chemical Safety Summary (LCSS) Datasheet |
| Molecular Formula | C20H12N3NaO7S |
| Synonyms | eriochrome black t Mordant Black 11 1787-61-7 Solochrome Black T Fast Chrome Black T More… |
| Molecular Weight | 461.4 |
What is EB t write its structure?
Sodium 1-[1-Hydroxynaphthylazo]-6-nitro-2-naphthol-4-sulfonate. Systematic IUPAC name. Sodium 4-[2-(1-hydroxynaphthalen-2-yl)hydrazin-1-ylidene]-7-nitro-3-oxo-3,4-dihydronaphthalene-1-sulfonate. Other names.
How does eriochrome block T acts as a indicator?
Eriochrome® Black T is used as an indicator for complexometric titrations. It functions as an acid-base indicator. Eriochrome® Black T forms complex with Ca2+ and Mg2+, but it binds more strongly to Mg2+ ions. Eriochrome® Black T is a hydroxyl-arylazo dye and is generally supplied as a monosodium salt.
What is the color change of eriochrome black T in EDTA titration?
EDTA is short for ethylenediaminetetraacetic acid. A blue dye called Eriochrome Black T (ErioT) is used as the indicator. This blue dye also forms a complex with the calcium and magnesium ions, changing colour from blue to pink in the process.
What is the Iupac name of eriochrome black T?
| IUPAC Name | sodium;(4Z)-4-[(1-hydroxynaphthalen-2-yl)hydrazinylidene]-7-nitro-3-oxonaphthalene-1-sulfonate |
|---|---|
| InChI Key | JHUJLRKQZAPSDP-GXTSIBQPSA-M |
| CAS Number 1787-61-7 | |
| PubChem CID 5351620 |
How do you make an eriochrome black T indicator?
Dissolve 1.0 g of Eriochrome Black T in 80 mL 95% ethanol. Make up to 100 mL with 95% ethanol. Schools will need to check if the chemicals to be used are approved for use in their jurisdiction.
How do you make an eriochrome black T indicator solution?
What is Eriochrome Black T used for in EDTA titration?
When used as an indicator in an EDTA titration, the characteristic blue end-point is reached when sufficient EDTA is added and the metal ions bound to the indicator are chelated by EDTA, leaving the free indicator molecule. Eriochrome Black T has also been used to detect the presence of rare earth metals.
What are the applications of Eriochrome Black T?
Applications. When used as an indicator in an EDTA titration, the characteristic blue end-point is reached when sufficient EDTA is added and the metal ions bound to the indicator are chelated by EDTA, leaving the free indicator molecule. Eriochrome Black T has also been used to detect the presence of rare earth metals.
Is Eriochrome Black T soluble in water?
Eriochrome® Black T is a hydroxyl-arylazo dye and is generally supplied as a monosodium salt. This dye exists as a dark violet powder with green metallic sheen. Eriochrome Black T is soluble in water and alcohol, but insoluble in common organic solvents.
What is the molecular weight of Eriochrome Black?
Eriochrome black t PubChem CID 135465089 Molecular Weight 461.4 Parent Compound CID 3246023 (C.I. Mordant black 11) Component Compounds CID 3246023 (C.I. Mordant black 11) CID Date s Modify 2021-07-03 Create 2019-01-15