Description

10H-Phenothiazine, 3,7-Bis(1,1-Dimethylethyl)- is a sterically hindered derivative of the phenothiazine class, valued for its role as a highly effective antioxidant and polymerization inhibitor. Its core value proposition lies in its ability to prevent premature degradation and stabilize sensitive materials against oxidative chain reactions. This compound is essential for industries requiring long-term material stability, such as polymer manufacturing, fuel and lubricant formulation, and specialty chemical synthesis.

Application

• Polymer Stabilizer: Acts as a primary antioxidant in polyolefins (e.g., polyethylene, polypropylene) and other polymers to prevent thermal and oxidative degradation during processing and service life.
• Fuel & Lubricant Additive: Inhibits gum and sludge formation in fuels, oils, and greases by scavenging free radicals, thereby extending equipment life and maintaining performance.
• Chemical Intermediate: Serves as a key building block for synthesizing more complex phenothiazine-based compounds used in pharmaceuticals, dyes, and agrochemicals.
• Rubber Antioxidant: Protects synthetic and natural rubber from ozone cracking and aging, preserving elasticity and mechanical properties.
• Inhibitor for Monomers: Prevents unwanted premature polymerization of vinyl monomers like styrene and acrylics during storage and transportation.
• Specialty Chemical Synthesis: Used in research and development for creating novel materials with specific electronic or photochemical properties.

Basic Information

Product Name	10H-Phenothiazine, 3,7-Bis(1,1-Dimethylethyl)-
CAS No.	27075-55-4
Molecular Formula	C20H25NS
Molecular Weight	311.49 g/mol
Synonyms	3,7-Di-tert-butylphenothiazine; DBPTZ; 3,7-Di-tert-butyl-10H-phenothiazine; Phenothiazine, 3,7-bis(1,1-dimethylethyl)-; 3,7-Di-t-butylphenothiazine; Antioxidant DBPTZ; Bis(1,1-dimethylethyl)phenothiazine; 3,7-Di-tert-butyl-5H-phenothiazine
EINECS	Contact for details

Quality Control

Our 10H-Phenothiazine, 3,7-Bis(1,1-Dimethylethyl)- is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee consistency and traceability for your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its easily oxidized nature, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation of quality. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Light yellow to beige crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	97 - 102 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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