Description

2-Oxo-2H-1-Benzopyran-6-Sulphonic Acid is a key heterocyclic organic intermediate featuring a fused coumarin-sulfonic acid structure. This compound matters for its dual functionality, serving as a versatile building block for synthesizing more complex molecules with tailored properties. It is primarily needed by manufacturers in the pharmaceutical, agrochemical, and specialty dye industries for research, development, and production processes.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a coumarin or benzopyran core with enhanced water solubility via the sulfonic acid group.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and plant growth regulators where the benzopyran scaffold is biologically active.
• Dye and Pigment Manufacturing: Serves as a key intermediate for producing sulfonated coumarin derivatives, which are used as fluorescent brightening agents, optical brighteners, and specialty dyes.
• Chemical Research & Development: Employed in academic and industrial R&D labs as a versatile scaffold for creating libraries of new chemical entities for screening.
• Complexing Agent Precursor: The sulfonic acid and carbonyl groups make it a potential starting material for synthesizing ligands and complexing agents in coordination chemistry.

Basic Information

Product Name	2-Oxo-2H-1-Benzopyran-6-Sulphonic Acid
CAS No.	27279-86-3
Molecular Formula	C9H6O5S
Molecular Weight	226.21 g/mol
Synonyms	6-Sulfocoumarin; Coumarin-6-sulfonic Acid; 6-Coumarinsulfonic Acid; 1-Benzopyran-6-sulfonic Acid, 2-Oxo-2H-; 2H-1-Benzopyran-6-sulfonic Acid, 2-Oxo-; 6-Hydroxy-2-oxo-2H-chromene-8-sulfonic Acid (tautomer); NSC 403796
EINECS	Contact for details

Quality Control

Our 2-Oxo-2H-1-Benzopyran-6-Sulphonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specifications such as assay, impurity profile, and physical characteristics are provided and available upon request, supporting compliance in regulated applications.

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%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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