Description
Pyrocatechol violet is a p.a. grade metal indicator dye used in analytical chemistry for complexometric and spectrophotometric determinations. It carries CAS number 115-41-3, empirical formula C₁₉H₁₄O₇S and molar mass 386,38 g/mol. Typical laboratory contexts include titration endpoints and metal-ion detection procedures that rely on the characteristic colour response of this sulfonephthalein-type dye. Material from manufacturer Carl ROTH is presented with clear identity data to support method validation and inventory control. The compact pack size is convenient for research groups, quality-control laboratories and teaching environments that need only small amounts of a defined p.a. indicator. Handle according to standard laboratory practice and refer to the safety documentation when preparing aqueous or buffered working solutions.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Appearance: dark-green metallic to brown powder
- Appearance of solution (0,1 % in H2O): clear
- Absorption max. (CH3OH): 440-470 nm
- Suitability as indicator for complexometry: complies
- CAS number: 115-41-3
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 204-088-3
- Empirical formula: C₁₉H₁₄O₇S
- Molar mass: 386,38 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Recently viewed
You may also like
Questions about Pyrocatechol violet, p.a., 1 g, glass
What is this article?
Pyrocatechol violet, p.a., 1 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. Articles in stock ship within 2–5 business days. 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.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.