Description

2-Methyl-4,4',6,6'-Tetrakis(1,1-Dimethylethyl)-2,2'-Spirobi[1,3,2-Benzodioxarsole] is a specialized organoarsenic compound, CAS NO 94904-61-7, valued for its unique spirocyclic structure and sterically hindered phenolic groups. This compound serves as a highly effective stabilizer and antioxidant in demanding polymer applications, where it provides exceptional resistance to thermal and oxidative degradation. It is primarily needed by manufacturers in the plastics, specialty polymers, and advanced material synthesis sectors seeking to enhance product longevity and performance under harsh conditions.

Application

• Primary antioxidant and stabilizer for high-performance engineering plastics and polymers.
• Additive for polyolefins (e.g., PP, PE) to prevent thermal-oxidative degradation during processing and end-use.
• Stabilizing component in synthetic fibers and elastomers to maintain mechanical properties.
• Intermediate in the research and development of novel organometallic catalysts and ligands.
• Specialty additive for adhesives, coatings, and sealants requiring enhanced weatherability.
• Potential use as a flame retardant synergist in specific polymer formulations.
• Research chemical in academic and industrial laboratories studying arsenic-containing heterocycles.

Basic Information

Product Name	2-Methyl-4,4',6,6'-Tetrakis(1,1-Dimethylethyl)-2,2'-Spirobi[1,3,2-Benzodioxarsole]
CAS No.	94904-61-7
Molecular Formula	C33H48As2O4
Molecular Weight	658.53 g/mol
Synonyms	2,2'-Spirobi[1,3,2-benzodioxarsole], 2-methyl-4,4',6,6'-tetra-tert-butyl derivative; Tetra-tert-butyl spirobi(benzodioxarsole); Antioxidant 94904-61-7; Spirocyclic arsenic antioxidant; 2-Methyl-4,4',6,6'-tetrakis(tert-butyl)-2,2'-spirobi[1,3,2]benzodioxarsole; Sterically hindered phenolic arsenic stabilizer
EINECS	Contact for details

Quality Control

Our 2-Methyl-4,4',6,6'-Tetrakis(1,1-Dimethylethyl)-2,2'-Spirobi[1,3,2-Benzodioxarsole] is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key specifications. We support compliance with relevant global regulatory frameworks, and specifications can be aligned with customer-specific requirements 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 and incompatible materials. For long-term storage, consider an inert atmosphere to preserve efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic Content	Theoretical

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