Description

4-(5-Chloro-2H-Benzotriazol-2Yl)-1,3-Benzenediol is a high-purity benzotriazole derivative, a key intermediate in the synthesis of advanced ultraviolet (UV) light absorbers and stabilizers. This compound is critical for enhancing the durability and performance of polymers and coatings by preventing photodegradation. It is primarily required by manufacturers in the polymer additives, specialty chemicals, and advanced material sectors for developing high-performance formulations.

Application

• Primary Intermediate for UV Absorbers: Serves as a crucial building block in the synthesis of high-performance benzotriazole-class UV light stabilizers (e.g., Tinuvin® P, UV-P analogs).
• Polymer Stabilization: Incorporated into plastics (e.g., PVC, polycarbonates, polyesters) and synthetic fibers to prevent yellowing, embrittlement, and loss of mechanical properties caused by UV radiation.
• Coatings and Paints: Used in automotive, industrial, and architectural coatings to improve weatherability, gloss retention, and color stability.
• Adhesives and Sealants: Enhances the long-term performance and durability of adhesive formulations exposed to sunlight.
• Advanced Material Research: Utilized in R&D for developing new photostabilizers and functional materials with specific light-absorption properties.
• Cosmetic Ingredient Synthesis: Potential intermediate in the production of UV filters for sunscreen formulations, subject to appropriate regulatory approvals.

Basic Information

Product Name	4-(5-Chloro-2H-Benzotriazol-2Yl)-1,3-Benzenediol
CAS No.	57567-95-0
Molecular Formula	C₁₂H₈ClN₃O₂
Molecular Weight	261.66 g/mol
Synonyms	5-Chloro-2-(2,4-dihydroxyphenyl)-2H-benzotriazole; 2-(2,4-Dihydroxyphenyl)-5-chloro-2H-benzotriazole; 5-Chloro-2-(2,4-dihydroxyphenyl)-1,2,3-benzotriazole; UV Absorber Intermediate; Benzotriazole UV-P Chloro Derivative; 2H-Benzotriazol-2-ol, 5-chloro-2-(2,4-dihydroxyphenyl)-; Light Stabilizer Precursor
EINECS	Contact for details

Quality Control

Our production of 4-(5-Chloro-2H-Benzotriazol-2Yl)-1,3-Benzenediol adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The container should be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	190°C - 195°C
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.