Description

1-(4'-Sulfophenyl)-3-Carboxy-5-Pyrazolone CAS NO 118-47-8 is a versatile pyrazolone derivative, a high-purity organic intermediate valued for its reactive functional groups. This compound is critical for synthesizing advanced colorants, functional dyes, and specialized chelating agents. It serves the needs of manufacturers in the fine chemical, pharmaceutical intermediate, and specialty dye industries.

Application

• Dye and Pigment Intermediate: A key building block for the synthesis of acid dyes, reactive dyes, and metal-complex pigments.
• Pharmaceutical Synthesis: Used as a precursor in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Analytical Reagent: Functions as a sensitive chromogenic agent and chelator in spectrophotometric analysis for metal ion detection.
• Chemical Research: Serves as a versatile scaffold in organic synthesis and materials science research.
• Functional Material Production: Potential use in creating advanced polymers and ligands for catalysis.

Basic Information

Product Name	1-(4'-Sulfophenyl)-3-Carboxy-5-Pyrazolone
CAS No.	118-47-8
Molecular Formula	C10H8N2O5S
Molecular Weight	268.25 g/mol
Synonyms	5-Pyrazolone-3-carboxylic acid, 1-(4-sulfophenyl)-; 1-(p-Sulfophenyl)-3-carboxy-5-pyrazolone; SPCP; 4-(3-Carboxy-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid; 1-(4-Sulfophenyl)-1H-pyrazol-3-carboxylic acid; 5-Oxo-1-(4-sulfophenyl)-2-pyrazoline-3-carboxylic acid; 1-(p-Sulfophenyl)-5-pyrazolone-3-carboxylic acid
EINECS	204-258-9

Quality Control

Our production of 1-(4'-Sulfophenyl)-3-Carboxy-5-Pyrazolone adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting 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, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and stability.

Specification

Item	Specification
Appearance	Yellow to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 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.