Description

Phenol, 4-Chloro-3-Methyl-, Phosphite (3:1) is a specialized organophosphite compound widely utilized as a high-performance antioxidant and stabilizer in polymer chemistry. Its primary commercial value lies in its ability to effectively inhibit oxidative degradation and thermal breakdown, thereby extending the service life and maintaining the physical properties of sensitive materials. This product is essential for manufacturers in the plastics, synthetic rubber, and specialty adhesive industries seeking to enhance the durability and color stability of their formulations under demanding processing and end-use conditions.

Application

• Primary antioxidant and process stabilizer for polyolefins (PP, PE) and engineering plastics.
• Stabilizer component in synthetic rubber and elastomer production to prevent chain scission.
• Additive in hot-melt adhesives and sealants to improve thermal-oxidative stability during application.
• Stabilizing agent for lubricants and hydraulic fluids to prevent viscosity increase and sludge formation.
• Intermediate in the synthesis of more complex phosphite- and phosphate-based stabilizer systems.
• Protective additive for colorants and pigments in masterbatch production to prevent fading.

Basic Information

Product Name	Phenol, 4-Chloro-3-Methyl-, Phosphite (3:1)
CAS No.	71143-11-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Tris(4-chloro-3-methylphenyl) phosphite; Phosphorous acid, tris(4-chloro-3-methylphenyl) ester; 4-Chloro-3-methylphenol phosphite (3:1); Antioxidant 4C3MP; AO-4C3MP; (4-Chloro-3-methylphenoxy)phosphine oxide trimer; Stabilizer 71143-11-8
EINECS	Contact for details

Quality Control

Our production of Phenol, 4-Chloro-3-Methyl-, Phosphite (3:1) adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against comprehensive specifications, including identity, purity, and key physical-chemical parameters. Certificates of Analysis (COA) documenting these results are provided and can be tailored to meet specific customer or regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) in the headspace of the container is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or flakes
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Melting Point	Contact for details
Acidity (as PPA)	≤ 0.1 %
Volatile Matter	≤ 0.5 %

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