Description

4,4'-Di-tert-Butylbiphenyl (CAS NO 1625-91-8) is a high-purity organic compound belonging to the biphenyl class, characterized by its two bulky tert-butyl substituents in the para positions. This molecular structure provides exceptional thermal and oxidative stability, making it a valuable intermediate and functional material in advanced chemical synthesis. It is primarily sought after by manufacturers in the polymer, pharmaceutical, and specialty chemical industries for applications requiring robust, high-performance additives and precursors.

Application

• Polymer Additive: Acts as a stabilizer and antioxidant in high-performance plastics and engineering polymers to enhance thermal resistance and longevity.
• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of complex organic molecules and active pharmaceutical ingredients (APIs).
• Liquid Crystal Materials: Used as a core component or intermediate in the production of liquid crystal displays (LCDs) due to its rigid biphenyl structure.
• Organic Synthesis: Functions as a versatile intermediate in cross-coupling reactions and other catalytic processes to create more complex chemical architectures.
• Dye and Pigment Manufacturing: Employed as a precursor in the synthesis of specialized dyes and organic pigments.
• Research & Development: Utilized in academic and industrial R&D labs as a standard or reagent for material science and organic chemistry studies.

Basic Information

Product Name	4,4'-Di-tert-Butylbiphenyl
CAS No.	1625-91-8
Molecular Formula	C20H26
Molecular Weight	266.42 g/mol
Synonyms	4,4'-Di-tert-butyl-1,1'-biphenyl; 4,4'-Bis(tert-butyl)biphenyl; Di-tert-butylbiphenyl; DTBB; 1,1'-Biphenyl, 4,4'-bis(1,1-dimethylethyl)-; p,p'-Di-tert-butylbiphenyl; NSC 66480
EINECS	216-607-9

Quality Control

Our production of 4,4'-Di-tert-Butylbiphenyl adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications. We are committed to meeting the quality standards required for industrial and research applications.

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
Assay (HPLC)	≥ 98.0%
Melting Point	125 - 130 °C
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

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