Description
Eriochrome black T (C.I. 14645) is a p.a. reagent with CAS number 1787-61-7 and EG number 217-250-3. The empirical formula is C₂₀H₁₂N₃NaO₇S and the molar mass is 461,38 g/mol. The Colour Index number C.I. 14645 accompanies the chemical name and, together with CAS 1787-61-7, identifies the substance unambiguously. p.a. denotes the quality stated for this listing; the molar mass of 461,38 g/mol matches the given formula C₂₀H₁₂N₃NaO₇S. Additional registry data include UN number 3077. is the commercial unit for laboratory weighing and solution preparation where this p.a. material is specified. Catalogue placement covers determination of physical properties and water hardness determination, which are the application groups associated with Eriochrome black T (C.I. 14645) in this range. Laboratories can record C.I. 14645, CAS 1787-61-7, EG 217-250-3 and the p.a. designation when documenting the dye.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Appearance: black powder
- Loss on drying: ≤7 %
- Suitability as indicator for complexometry: complies
- CAS number: 1787-61-7
- Pack sizes: 25 g, 50 g, 100 g, 5 g, 250 g, 500 g, 1 kg
- EG nr.: 217-250-3
- Empirical formula: C₂₀H₁₂N₃NaO₇S
- Molar mass: 461,38 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
WarningHazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Eriochrome black T (C.I. 14645), p.a., 25 g, glass
What is this article?
Eriochrome black T (C.I. 14645), p.a., 25 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Analytical grade solvents (p.a.), inside Solvents, in Lab chemicals.
An analytical-grade solvent, often marked p.a., has impurity limits tight enough for classical analysis and for preparing reagents. It is not automatically low enough in UV absorbance for HPLC, and it is not dry enough for a water-sensitive reaction. The grade is the purchase.
A solvent dissolves. The grade says which impurities are low enough for the method. Analytical grade is the ordinary pure solvent. HPLC and LC-MS grades limit the absorbance and the ions that would become peaks or background. A dry solvent has had water removed. A deuterated solvent is for NMR, where the hydrogen signal would otherwise drown the sample. Technical grade is for cleaning and for synthesis that does not need a chromatogram. Identity is on PubChem. Names follow IUPAC. Hazards follow ECHA, the CLP Regulation and REACH.
Which category should I open next?
The category is Solvents. The sub-category is Analytical grade solvents (p.a.). The catalogue is Lab chemicals.
Shelves beside this one are HPLC & LC-MS grade solvents, Dry & deuterated solvents (NMR, synthesis), Technical & synthesis grade solvents and Green & alternative solvents.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
