Description

Acid Chrome Blue K is a high-purity metallochromic indicator and complexometric dye widely used in analytical chemistry. Its primary value lies in its sharp color change at specific endpoints, making it essential for precise volumetric analysis, particularly in the determination of metal ions. This product is a critical reagent for quality control laboratories and research facilities in the chemical, pharmaceutical, and environmental monitoring sectors.

Application

• Primary indicator for the complexometric titration of aluminum, calcium, magnesium, and other metal ions.
• Used in water hardness testing and analysis of boiler feed water.
• Employed as a staining agent in histology and biological research.
• Acts as a colorimetric reagent in spectrophotometric determination of trace metals.
• Utilized in the manufacturing and quality control of catalysts and ceramic materials.
• Applied in educational and research settings for teaching analytical chemistry techniques.

Basic Information

Item	Details
Product Name	Acid Chrome Blue K
CAS No.	3270-25-5
Molecular Formula	C16H9N2Na3O9S2
Molecular Weight	514.36 g/mol
Synonyms	Acid Chrome Blue K; Chrome Blue K; Mordant Blue 1; Eriochrome Blue SE; C.I. 43830; Sodium 5-[(3-carboxy-5-methyl-4-oxo-1,4-dihydropyridin-2-yl)hydrazinylidene]-8-hydroxy-7-(phenylazo)naphthalene-1,3-disulfonate; Calcon; Solochrome Dark Blue
EINECS	221-895-0

Quality Control

Our Acid Chrome Blue K is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including identity confirmation by IR spectroscopy and purity determination by HPLC, to ensure it meets the high standards required for analytical applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

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 kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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