Description

3Po CAS NO 18550-98-6 is a specialized organophosphorus compound, also known as tris(2,4-di-tert-butylphenyl) phosphite, valued for its high-performance antioxidant and stabilizer properties. This chemical is critical for enhancing the longevity and durability of polymer materials by preventing thermal and oxidative degradation during processing and end-use. It is an essential additive for manufacturers in the plastics, synthetic fiber, and rubber industries seeking to improve product quality and performance.

Application

• Polymer Stabilization: Primary use as a highly effective processing stabilizer and antioxidant for polyolefins (PP, PE), polyesters, and engineering plastics.
• Plastics Manufacturing: Protects polymers from chain scission and discoloration caused by heat and shear during extrusion, injection molding, and film blowing processes.
• Synthetic Fibers: Incorporated into fiber-grade polymers to maintain tensile strength and color stability during high-temperature spinning and drawing.
• Rubber Compounds: Used as an antioxidant in synthetic rubber formulations to prevent premature aging and extend product service life.
• Adhesives and Coatings: Enhances the thermal stability of hot-melt adhesives and various coating resins, preventing gelation and viscosity changes.
• Masterbatch Production: A key component in antioxidant and stabilizer concentrate masterbatches for simplified and uniform dispersion in final polymer products.

Basic Information

Item	Detail
Product Name	3Po CAS NO 18550-98-6
CAS No.	18550-98-6
Molecular Formula	C42H63O3P
Molecular Weight	646.92 g/mol
Synonyms	Tris(2,4-di-tert-butylphenyl) phosphite; Phosphorous acid, tris(2,4-bis(1,1-dimethylethyl)phenyl) ester; Irgafos 168; Hostanox PAR 24; Antioxidant 168; AO 168; Tris(2,4-di-tert-butylphenyl)phosphate; 2,4-Di-tert-butylphenyl phosphite (3:1)
EINECS	242-440-4

Quality Control

Our production of 3Po (CAS 18550-98-6) adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is manufactured and tested in facilities that follow cGMP guidelines. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, melting point, and specific impurity levels. We support compliance with global regulatory frameworks including REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 99.0 %
Melting Point	182 - 186 °C
Volatile Matter	≤ 0.5 %
Acidity (as H3PO4)	≤ 0.05 %
2,4-Di-tert-butylphenol	≤ 0.2 %
Solution Color (APHA)	≤ 50

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