Description

5-Br-Paps is a specialized chemical reagent primarily used as a chromogenic agent for the spectrophotometric determination of zinc. Its high sensitivity and selectivity make it an essential tool for analytical chemistry applications requiring precise metal ion quantification. This compound is critical for researchers and quality control laboratories in the pharmaceutical, environmental monitoring, and metallurgical industries.

Application

• Spectrophotometric Zinc Assay: Primary use as a selective chromogenic reagent for the colorimetric detection and quantification of zinc ions (Zn²⁺) in solution.
• Analytical Chemistry Research: Employed in method development and validation for trace metal analysis in various matrices.
• Environmental Testing: Used to analyze zinc content in water, soil, and industrial waste samples for compliance and monitoring purposes.
• Pharmaceutical QC: Determination of zinc in drug substances, excipients, and finished pharmaceutical products.
• Clinical Diagnostics: Potential use in the development of diagnostic kits for measuring zinc levels in biological fluids.
• Metallurgy & Material Science: Analysis of zinc coatings, alloys, and processing solutions.

Basic Information

Product Name	5-Br-Paps
CAS No.	81668-06-2
Molecular Formula	C20H14BrN3NaO6S2
Molecular Weight	558.36 g/mol
Synonyms	2-(5-Bromo-2-pyridylazo)-5-[N-propyl-N-(3-sulfopropyl)amino]phenol, Sodium Salt; 5-Br-PAPS; 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol; Zinc Indicator 5-Br-PAPS; 5-Bromo-PAPS; Spectrophotometric Zinc Reagent; 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol derivative
EINECS	Contact for details

Quality Control

Our 5-Br-Paps is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets the high standards required for precise analytical work. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). The product is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Absorbance (in solution)	Conforms to reference
Zinc Complex Stability	Stable chromophore formation

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