Description

1-(2-Hydroxy-3-Carboxy-5-Sulfophenyl)-3-Methyl-5-Pyrazolone is a versatile heterocyclic organic compound featuring a pyrazolone core substituted with functional groups that confer unique reactivity and chelating properties. This chemical is valued for its role as a key intermediate and analytical reagent in high-precision industrial and research applications. It is primarily sought by manufacturers in the pharmaceutical, dye, and specialty chemical sectors for synthesis and quality control processes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring complex heterocyclic structures.
• Analytical Chemistry Reagent: Serves as a sensitive chromogenic agent and chelator for the spectrophotometric determination of metal ions like iron, copper, and aluminum.
• Dye and Pigment Manufacturing: Acts as a precursor for producing azo dyes and other complex colorants, contributing to color fastness and hue.
• Chemical Synthesis Building Block: Utilized in organic synthesis to construct more complex molecules for agrochemicals and fine chemicals.
• Research & Development: Employed in academic and industrial R&D for method development and studying reaction mechanisms.

Basic Information

Product Name	1-(2-Hydroxy-3-Carboxy-5-Sulfophenyl)-3-Methyl-5-Pyrazolone
CAS No.	6201-74-7
Molecular Formula	C11H10N2O6S
Molecular Weight	298.27 g/mol
Synonyms	3-Methyl-1-(2-hydroxy-3-carboxy-5-sulfophenyl)-5-pyrazolone; 5-Pyrazolone, 1-(2-hydroxy-3-carboxy-5-sulfophenyl)-3-methyl-; Ferron (reagent); 8-Hydroxy-7-iodo-5-quinolinesulfonic acid (related reagent class); HOCSPMP; Iron reagent; Photometric reagent for iron; 1-(2-Hydroxy-3-carboxy-5-sulfophenyl)-3-methyl-2-pyrazolin-5-one
EINECS	Contact for details

Quality Control

Our production of 1-(2-Hydroxy-3-Carboxy-5-Sulfophenyl)-3-Methyl-5-Pyrazolone adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Yellow to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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