Description

1,2,3-Oxadiazole-4-Carboxylic Acid, 5-Hydroxy-, 3-Oxide (9Ci) is a specialized heterocyclic carboxylic acid derivative with a fused oxadiazole oxide structure, serving as a high-value synthetic intermediate. This compound is critical for advanced research and development, particularly in the synthesis of novel active pharmaceutical ingredients (APIs) and functional materials. It is primarily sought by pharmaceutical R&D laboratories, agrochemical innovators, and specialty chemical manufacturers for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, especially those targeting neurological and anti-inflammatory pathways.
• Agrochemical Research: Used in developing new generation herbicides and plant growth regulators with unique modes of action.
• Material Science: Serves as a precursor for functional polymers and ligands in catalytic systems.
• Chemical Biology: Employed as a probe or linker in bioconjugation and proteomics research due to its reactive carboxylic acid group.
• Academic & Industrial R&D: Fundamental reagent for methodological studies in heterocyclic and medicinal chemistry.

Basic Information

Product Name	1,2,3-Oxadiazole-4-Carboxylic Acid, 5-Hydroxy-, 3-Oxide (9Ci)
CAS No.	732240-75-4
Molecular Formula	C3H2N2O5
Molecular Weight	146.06 g/mol
Synonyms	5-Hydroxy-1,2,3-oxadiazole-4-carboxylic acid 3-oxide; 1,2,3-Oxadiazole-4-carboxylic acid, 5-hydroxy-, 3-oxide; 4-Carboxy-5-hydroxy-1,2,3-oxadiazole 3-oxide; 5-Hydroxy-[1,2,3]oxadiazole-4-carboxylic acid 3-oxide; Furoxan-4-carboxylic acid, 5-hydroxy- derivative; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Every batch of 1,2,3-Oxadiazole-4-Carboxylic Acid, 5-Hydroxy-, 3-Oxide is manufactured and tested under strict quality management systems. Our products undergo rigorous analytical testing, including HPLC and NMR, to ensure high purity and consistency suitable for research and development applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Single Unknown Impurity (HPLC)	≤ 1.0%
Total Impurities (HPLC)	≤ 5.0%

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