Description

Bis[4-(1,1,3,3-Tetramethylbutyl)Phenyl] Phosphate Calcium Salt is a high-performance organophosphorus compound widely used as a specialty additive. This chemical is valued for its excellent thermal stability and compatibility with various polymer systems, making it a critical component in enhancing material properties. It is primarily sought after by manufacturers in the polymer, lubricant, and specialty chemical industries for applications requiring effective stabilization and performance under demanding conditions.

Application

• Polymer Stabilizer: Acts as a highly effective secondary antioxidant and processing stabilizer in polyolefins (e.g., PP, PE), PVC, and engineering plastics to prevent thermal degradation during extrusion and molding.
• Lubricant & Grease Additive: Functions as an anti-wear and extreme pressure (EP) additive in synthetic lubricants and industrial greases, improving performance in high-load applications.
• Flame Retardant Synergist: Used in combination with halogenated flame retardants in wire & cable insulation, electronic housings, and construction materials to enhance flame-retardant efficacy.
• Hydraulic Fluid Component: Imparts hydrolytic stability and anti-wear properties to advanced fire-resistant hydraulic fluids and other specialty fluid formulations.
• Rubber Industry: Serves as a non-discoloring antioxidant and processing aid in synthetic rubber production, helping to maintain elasticity and prevent aging.
• Adhesive & Sealant Formulations: Enhances the thermal-oxidative stability of hot-melt adhesives and high-performance sealants.

Basic Information

Product Name	Bis[4-(1,1,3,3-Tetramethylbutyl)Phenyl] Phosphate Calcium Salt
CAS No.	40835-97-0
Molecular Formula	C36H58CaO4P2
Molecular Weight	656.86 g/mol
Synonyms	Calcium bis[4-(1,1,3,3-tetramethylbutyl)phenyl] phosphate; Calcium bis(4-tert-octylphenyl) phosphate; Calcium di(4-tert-octylphenyl) phosphate; Irgastab B 561; Weston 491; Antioxidant 491; Phosphoric acid, bis[4-(1,1,3,3-tetramethylbutyl)phenyl] ester, calcium salt; Calcium tert-octylphenyl phosphate
EINECS	255-103-9

Quality Control

Our production of Bis[4-(1,1,3,3-Tetramethylbutyl)Phenyl] Phosphate Calcium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay, impurity profiling, and physical property verification, to ensure consistent performance and purity for industrial applications. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after initial use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Calcium Content	5.8 - 6.3 %
Loss on Drying	≤ 1.0 %
Melting Point	95 - 105 °C
Heavy Metals (as Pb)	≤ 20 ppm

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