Description

(E)-Azobenzene-3-Carboxylic Acid CAS NO 37790-19-5 is a high-purity, functionalized azobenzene derivative characterized by its carboxylic acid group at the meta position. This compound is a critical photo-responsive building block and molecular switch for advanced materials research and development. It is primarily utilized by R&D chemists and material scientists in the pharmaceutical, photonics, and polymer industries to create light-controlled systems and smart materials.

Application

• Molecular Switches & Photo-responsive Materials: Core component in the synthesis of light-activated molecular machines, switches, and actuators for nanotechnology.
• Liquid Crystal & Polymer Modification: Used as a functional dopant or cross-linker to impart photo-alignment properties to liquid crystal displays (LCDs) and smart polymers.
• Surface Functionalization & Self-Assembled Monolayers (SAMs): The carboxylic acid group enables covalent attachment to metal oxides and other surfaces for creating photo-responsive coatings.
• Pharmaceutical & Bioconjugation Research: Serves as a photochromic linker in prodrug design and for studying light-triggered biological processes.
• Dye & Pigment Intermediate: Acts as a precursor for synthesizing specialized azo dyes and pigments with unique optical properties.
• Academic & Industrial R&D: Essential reagent for fundamental research in photochemistry, supramolecular chemistry, and material science.

Basic Information

Product Name	(E)-Azobenzene-3-Carboxylic Acid
CAS No.	37790-19-5
Molecular Formula	C13H10N2O2
Molecular Weight	226.23 g/mol
Synonyms	3-(Phenyldiazenyl)benzoic acid; (E)-3-Phenylazobenzoic acid; Azobenzene-3-carboxylic acid; 3-Carboxyazobenzene; 3-Azobenzoic acid; Benzoic acid, 3-(2-phenyldiazenyl)-, (E)-; trans-Azobenzene-3-carboxylic acid; AB-COOH
EINECS	Contact for details

Quality Control

Our (E)-Azobenzene-3-Carboxylic Acid is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity, suitable for sensitive research applications. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, isomer content, and key impurities. We adhere to ISO 9001 quality management principles, and our analytical methods include HPLC, NMR, and FT-IR for definitive identification and quantification.

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 nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0% (Area %)
(E)-Isomer Content (HPLC)	≥ 99.0%
Loss on Drying	≤ 0.5%
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.