Description

Bathophenanthroline Disulfonic Acid is a high-purity, water-soluble chelating agent and chromogenic indicator. Its primary value lies in its exceptional selectivity and sensitivity for the spectrophotometric determination of trace iron (Fe²⁺), making it a critical reagent for analytical chemistry and quality control. This compound is essential for industries and laboratories requiring precise metal ion quantification, including pharmaceutical manufacturing, environmental monitoring, and advanced materials research.

Application

• Spectrophotometric Iron Assay: Primary reagent for the highly sensitive colorimetric detection and quantification of ferrous iron (Fe²⁺) in aqueous solutions.
• Pharmaceutical QC & Raw Material Testing: Used in purity testing of active pharmaceutical ingredients (APIs), excipients, and finished drug products to control iron impurities.
• Environmental & Water Analysis: Detection of trace iron levels in drinking water, wastewater, and environmental samples for regulatory compliance.
• Biochemical & Clinical Research: Chelating agent in studies of iron metabolism, oxidative stress, and as a component in diagnostic kits.
• High-Purity Chemical & Semiconductor Manufacturing: Monitoring ultra-low levels of iron contamination in process chemicals, solvents, and on silicon wafer surfaces.
• Food & Beverage Industry Analysis: Testing for iron content and fortification levels in food products and nutritional supplements.

Basic Information

Product Name	Bathophenanthroline Disulfonic Acid
CAS No.	28061-20-3
Molecular Formula	C₂₄H₁₆N₂O₆S₂
Molecular Weight	492.52 g/mol
Synonyms	4,7-Diphenyl-1,10-phenanthrolinedisulfonic Acid; Bathophenanthrolinedisulfonic Acid; BPS; FerroZine Iron Reagent; 3-(2-Pyridyl)-5,6-bis(4-phenylsulfonic acid)-1,2,4-triazine Disodium Salt; 4,7-Diphenyl-1,10-phenanthroline-3,8-disulfonic Acid; Iron(II) Indicator; Bathophen Disulfonate
EINECS	248-818-3

Quality Control

Every batch of Bathophenanthroline Disulfonic Acid is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the product meets the high standards required for trace analysis. A detailed Certificate of Analysis (COA) is supplied with each shipment, reporting key parameters such as purity (Assay), iron content, and absorbance characteristics. Our quality commitment supports applications in regulated environments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent degradation. Keep away from strong acids and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Iron (Fe) Content	≤ 0.001%
Absorbance (Lambda max)	535 - 540 nm (Fe²⁺ complex)
Water Content (KF)	≤ 2.0%
Solubility (in Water)	Clear, yellow solution

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