Description

2,4,6-Tri-tert-Butylphenylesterofsalicylphosphorousacid CAS NO 15643-48-8 is a specialized organophosphorus compound widely recognized for its role as a high-performance antioxidant and stabilizer. Its primary commercial value lies in its ability to effectively inhibit oxidative degradation and thermal decomposition in sensitive materials. This product is essential for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance the longevity and stability of their formulations under demanding conditions.

Application

• Polymer Stabilization: Acts as a highly effective antioxidant and processing stabilizer for polyolefins (e.g., PP, PE), engineering plastics, and synthetic rubbers to prevent thermal and oxidative degradation during processing and end-use.
• Lubricant & Fuel Additive: Used as an antioxidant additive in synthetic lubricants, greases, and industrial oils to extend service life and maintain performance under high-temperature and high-stress conditions.
• Elastomer Protection: Imparts excellent aging resistance to synthetic elastomers, such as SBR and NBR, protecting against cracking and loss of mechanical properties.
• Adhesive & Sealant Formulations: Enhances the shelf-life and thermal stability of hot-melt adhesives, polyurethane systems, and other reactive sealants.
• Specialty Chemical Intermediate: Serves as a key building block or additive in the synthesis of other advanced stabilizers and functional chemicals.

Basic Information

Product Name	2,4,6-Tri-tert-Butylphenylesterofsalicylphosphorousacid
CAS No.	15643-48-8
Molecular Formula	C29H43O3P
Molecular Weight	470.62 g/mol
Synonyms	Salicylphosphonic Acid 2,4,6-Tri-tert-butylphenyl Ester; 2,4,6-Tri-tert-butylphenyl Salicylphosphonate; Phosphonic acid, P-(2-hydroxybenzoyl)-, 2,4,6-tris(1,1-dimethylethyl)phenyl ester; Antioxidant 1790; Irganox 1790; Hostanox OSP 1; CAS 15643-48-8; Salicylphosphonite antioxidant
EINECS	Contact for details

Quality Control

Our production of 2,4,6-Tri-tert-Butylphenylesterofsalicylphosphorousacid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry benchmarks. Certificates of Analysis (COA) documenting all critical quality parameters are available upon request to support your quality assurance and regulatory needs.

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 material is easily oxidized and should be kept under an inert atmosphere (e.g., nitrogen) for long-term storage to maintain optimal efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	180 - 185 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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