Description

Xylenol Orange is a versatile metallochromic indicator and complexometric reagent widely used in analytical chemistry. Its primary value lies in its high sensitivity and selectivity for metal ions, particularly in titration and spectrophotometric analyses. This product is essential for research laboratories, quality control facilities, and industrial processes requiring precise metal ion detection and quantification.

Application

• Complexometric Titrations: As a visual indicator for the titration of metal ions like zirconium(IV), thorium(IV), and bismuth(III) with EDTA.
• Spectrophotometric Analysis: For the quantitative determination of trace metal ions in environmental, biological, and industrial samples.
• Biochemical Research: Used in studies of metal-protein interactions and as a probe for calcium and other divalent cations in biological systems.
• Water Treatment Analysis: Monitoring heavy metal contamination in wastewater and process water streams.
• Pharmaceutical QC: Testing for metal impurities in active pharmaceutical ingredients (APIs) and excipients.
• Geochemical Analysis: Assaying metal content in ore, soil, and mineral samples.

Basic Information

Product Name	Xylenol Orange
CAS No.	1202864-39-8
Molecular Formula	C31H32N2O13S
Molecular Weight	672.66 g/mol
Synonyms	3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]-o-cresolsulfonphthalein; XO; Xylenol Orange tetrasodium salt; o-Cresolsulfonphthalein-3,3'-bis(methyliminodiacetic acid); C.I. 45440; Acid Chrome Blue K; Metalphthalein XO
EINECS	Contact for details

Quality Control

Our Xylenol Orange is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is tested to confirm identity, potency, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing purity (by HPLC), loss on drying, residue on ignition, and heavy metal content is provided with every shipment to support your quality and regulatory requirements.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect performance.

Specification

Item	Specification
Appearance	Orange-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Residue on Ignition (Sulfated Ash)	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Absorbance Ratio (A430/A560)	1.50 - 1.80

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