Description

Pyrocatechol Violet is a high-purity, triphenylmethane-based organic dye and analytical reagent. It serves as a highly sensitive and selective metallochromic indicator, forming distinct colored complexes with various metal ions. This compound is essential for researchers and quality control laboratories in the chemical, pharmaceutical, and environmental sectors for complexometric titrations and spectrophotometric analysis.

Application

• Complexometric Titration Indicator: Primarily used as a visual indicator for the titration of metal ions like aluminum, bismuth, and thorium with EDTA.
• Spectrophotometric Analysis: Employed in the quantitative determination of trace metals in water, alloys, and pharmaceutical products due to its colorimetric properties.
• Biochemical Research: Utilized as a staining agent and probe in histology and for studying metal-protein interactions.
• Industrial Process Control: Applied in monitoring metal ion concentrations in plating baths, catalyst preparations, and metallurgical processes.
• Educational Laboratories: A standard reagent in university and college chemistry labs for teaching analytical chemistry techniques.

Basic Information

Product Name	Pyrocatechol Violet
CAS No.	115-41-3
Molecular Formula	C19H14O7S
Molecular Weight	386.38 g/mol
Synonyms	Pyrocatechol Violet; Catechol Violet; 3,3',4'-Trihydroxyfuchsome-2'-sulfonic Acid; Pyrocatechin Violet; 4-[3-(3,4-Dihydroxyphenyl)-1-(4-hydroxy-3-sulfophenyl)-3-oxopropyl]-1,2-benzenediol; PV; CI 51025
EINECS	204-088-8

Quality Control

Our Pyrocatechol Violet is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and performance as an analytical reagent. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with our stringent in-house specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is light-sensitive (store away from light). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark green to brownish-green powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Residue on Ignition (Sulfated Ash)	≤ 0.5 %
Solubility (in Water)	Clear, brownish-yellow solution
pH (1% Solution)	2.0 - 4.0
λ max (in Water)	440 nm & 580 nm (typical)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.