Description

Pyrogallol Red is a high-purity, synthetic organic dye widely used as a sensitive colorimetric indicator and complexometric reagent. Its primary commercial value lies in its exceptional selectivity for certain metal ions, making it indispensable for precise analytical determinations. This product is essential for quality control laboratories, research institutions, and manufacturers in the pharmaceutical, environmental monitoring, and chemical analysis sectors requiring reliable and consistent reagent performance.

Application

• Spectrophotometric Determination of Proteins: Used in clinical diagnostics and biochemical research for quantifying proteins in biological samples.
• Complexometric Titration Indicator: Serves as a metallochromic indicator for the titration of metals like aluminum, gallium, and zirconium.
• Analytical Reagent for Metal Ions: Employed in the development of test kits and methods for detecting trace metals in water, food, and industrial samples.
• Research & Development: Utilized in academic and industrial R&D for studying metal-ligand interactions and developing new analytical methodologies.
• Dye Intermediate: Acts as a precursor or component in the synthesis of more complex dyes and pigments.

Basic Information

Product Name	Pyrogallol Red
CAS No.	85531-30-2
Molecular Formula	C19H12O8S
Molecular Weight	400.36 g/mol
Synonyms	Pyrogallol Red; Pyrogallolsulfonphthalein; 2,6,7-Trihydroxy-9-(2-sulfophenyl)-3H-xanthen-3-one; 3H-Xanthen-3-one, 2,6,7-trihydroxy-9-(2-sulfophenyl)-; PGR; C.I. 45415; Acid Red 114 (related class)
EINECS	Contact for details

Quality Control

Our Pyrogallol Red is manufactured under a strict quality management system to ensure batch-to-batch consistency and reliability for critical analytical applications. Each lot undergoes comprehensive testing, including identity confirmation by IR spectroscopy and purity assessment by HPLC. A detailed Certificate of Analysis (COA) documenting all specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, minimize exposure during handling.

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 1.0%
Absorbance (λ max)	Conforms to standard

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