Tender No: NMDC/HO/29/17-18/ET/69 – stands cancelled as per competent approval by NMDC. NMDC/HO/102/20-21/ET/788 for Itemwise: 2. EpiPens and & Adrenochrome Research with IPOT, Jay Myers Documentaries and Enterthestars. Social Media Links:Website: h. Epichrome is a fantastic solution for site-specific browsers (AKA SSBs). Yet, I prefer Firefox to Chrome due to its great extensibility. Also, even though Epichrome is great, it has problems like copying extensions for an SSB from one workstation to another. Quit all your Epichrome apps. Run the main Google Chrome and go to the About Google Chrome page. If it shows an update pending, tell it to update and relaunch. Once you have confirmed Chrome is up to date, try relaunching your Epichrome apps. You might get the warning the first time you run them, but subsequent runs should not show the warning.
Names | |
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Preferred IUPAC name 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 Sodium 4-[2-(1-hydroxynaphthalen-2-yl)hydrazin-1-ylidene]-7-nitro-3-oxonaphthalene-1-sulfonate; Solochrome Black T; ET-00; Erio T | |
Identifiers | |
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Abbreviations | EBT |
4121162 | |
ECHA InfoCard | |
EC Number |
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MeSH | Eriochrome+black+T |
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RTECS number | |
UNII |
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UN number | 2923 |
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Properties | |
C20H12N3O7SNa | |
Molar mass | 461.381 g/mol |
Appearance | dark red/brown powder |
Acidity (pKa) | 6.2, 11.55 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
verify (what is ?) | |
Infobox references |
Eriochrome Black T is a complexometric indicator that is used in complexometric titrations, e.g. in the water hardness determination process. It is an azo dye. Eriochrome is a trademark of Huntsman Petrochemical, LLC.[1]
In its deprotonated form, Eriochrome Black T is blue. It turns red when it forms a complex with calcium, magnesium, or other metal ions.
Applications[edit]
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.[2]
References[edit]
- ^http://www.sigmaaldrich.com/catalog/product/sial/858390?lang=en®ion=US
- ^Dubenskaya, L. O.; Levitskaya, G. D. (1999). 'Use of eriochrome black T for the polarographic determination of rare-earth metals'. Journal of Analytical Chemistry. 54 (7): 655–657. ISSN1061-9348.
External links[edit]
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