Description

3,3',5,5'-Tetramethylbiphenyl CAS NO 25570-02-9 is a high-purity, symmetrical biphenyl derivative characterized by its four methyl substituents, which impart unique steric and electronic properties. This compound serves as a critical advanced intermediate and building block in sophisticated organic synthesis. It is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty materials sectors who require precise molecular architectures for developing new active ingredients and functional polymers.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of complex drug molecules, particularly those requiring rigid, lipophilic core structures.
• Ligand & Catalyst Synthesis: Used to prepare sterically hindered ligands for transition metal catalysts in asymmetric synthesis and polymerization processes.
• Agrochemical Active Ingredient Development: Serves as a core scaffold in the research and production of novel herbicides and fungicides.
• Liquid Crystal & OLED Materials: Acts as a fundamental unit in the creation of advanced organic electronic materials due to its stable, planar biphenyl core.
• Polymer & Resin Modifier: Incorporated into polymer chains to enhance thermal stability, rigidity, and solubility properties.
• Research & Development: A valuable reference standard and starting material in academic and industrial organic chemistry research.

Basic Information

Item	Detail
Product Name	3,3',5,5'-Tetramethylbiphenyl
CAS No.	25570-02-9
Molecular Formula	C16H18
Molecular Weight	210.31 g/mol
Synonyms	3,3',5,5'-Tetramethyl-1,1'-biphenyl; 3,3',5,5'-Tetramethylbiphenyl; 3,3',5,5'-Tetramethyl-[1,1'-biphenyl]; 1,1'-Biphenyl, 3,3',5,5'-tetramethyl-; TMBP; Tetramethylbiphenyl; sym-Tetramethylbiphenyl
EINECS	Contact for details

Quality Control

Our production of 3,3',5,5'-Tetramethylbiphenyl adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and GC-MS for identity confirmation, to ensure it meets exacting customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

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). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	115 - 119 °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.