Description

Xylidyl Blue I CAS NO 36505-52-9 is a specialized organic dye compound belonging to the triarylmethane class. This high-purity chemical is valued for its distinct colorimetric properties and serves as a critical reagent in analytical chemistry and research. It is primarily utilized by professionals in the chemical manufacturing, life sciences, and quality control sectors for precise detection and measurement applications.

Application

Xylidyl Blue I is a versatile analytical reagent with applications across several technical fields. Its primary uses include:

• Complexometric Titration Indicator: Used as a metallochromic indicator for the titration of various metal ions, including aluminum, magnesium, and zinc.
• Biochemical Research: Employed in laboratory studies for staining and detection protocols in histology and cellular analysis.
• Water Quality Testing: Applied in environmental monitoring for the colorimetric determination of hardness and specific metal contaminants.
• Industrial Process Control: Serves as a key component in chemical synthesis and quality assurance processes where metal ion concentration must be monitored.
• Dye Intermediate: Acts as a precursor or intermediate in the synthesis of more complex dyes and pigments.
• Educational & Laboratory Reagent: Supplied to academic and commercial laboratories for analytical chemistry experiments and method development.

Basic Information

Product Name	Xylidyl Blue I
CAS No.	36505-52-9
Molecular Formula	C25H27N3O6S
Molecular Weight	497.56 g/mol
Synonyms	Xylidyl Blue I; 3,3'-Bis[N,N-di(carboxymethyl)aminomethyl]-o-cresolsulfonphthalein; 3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]-o-cresolsulfonphthalein; NSC 403914; o-Cresolsulfonphthalein, 3,3'-bis[N,N-bis(carboxymethyl)aminomethyl]-; Xylenol Blue I; Metallochromic indicator Xylidyl Blue.
EINECS	Contact for details

Quality Control

Our Xylidyl Blue I is manufactured under strict quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR spectroscopy, to ensure it meets the high standards required for analytical and research applications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed after opening to prevent degradation from atmospheric moisture and light exposure.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Absorbance Spectrum	Conforms to reference
Heavy Metals (as Pb)	≤ 20 ppm

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