Description

1H-Indazole-5-Sulfonic Acid is a versatile sulfonated heterocyclic building block essential for advanced organic synthesis. Its core value lies in its ability to introduce both the indazole pharmacophore and a sulfonic acid moiety, enabling the development of compounds with enhanced solubility and biological activity. This intermediate is critically needed by research and development chemists in the pharmaceutical and agrochemical industries for creating new active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly kinase inhibitors and other targeted therapies.
• Agrochemical Research: Used in developing new herbicides, fungicides, and plant growth regulators with improved efficacy.
• Dye and Pigment Synthesis: Serves as a precursor for creating specialized sulfonated dyes with specific color properties and solubility.
• Ligand and Catalyst Development: Utilized in organometallic chemistry to create complexing agents and catalytic systems.
• Material Science: Incorporated into polymers and advanced materials to modify surface properties and ionic characteristics.
• Bioconjugation Chemistry: The sulfonic acid group can be functionalized for linking biomolecules in diagnostic and therapeutic applications.

Basic Information

Product Name	1H-Indazole-5-Sulfonic Acid
CAS No.	98550-01-7
Molecular Formula	C7H6N2O3S
Molecular Weight	198.20 g/mol
Synonyms	5-Indazolesulfonic Acid; Indazole-5-sulfonic Acid; 1H-Indazole-5-sulfonic acid; 5-Sulfo-1H-indazole; 1H-Indazole-5-sulphonic Acid; 98550-01-7; 5-Indazole Sulfonic Acid
EINECS	Contact for details

Quality Control

Our 1H-Indazole-5-Sulfonic Acid is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets the high standards required for research and development applications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and residual solvents.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residual Solvents (GC)	Meets ICH guidelines
Heavy Metals	< 20 ppm

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