Description

Spirobiindane CAS NO 1568-80-5 is a high-purity, rigid organic compound featuring a unique spirocyclic structure. This molecular architecture is highly valued for its ability to impart exceptional thermal stability, chemical resistance, and optical properties to advanced materials. It serves as a critical building block and performance additive for manufacturers in the polymer, electronics, and specialty chemical sectors seeking to enhance product durability and functionality.

Application

• High-Performance Polymer Synthesis: A key monomer or additive for producing polyimides, polycarbonates, and epoxy resins with improved heat resistance and mechanical strength.
• Advanced Optical Materials: Used in the development of optical lenses, films, and coatings where high transparency and refractive index control are required.
• Electronic Encapsulants & Substrates: Enhances the thermal and dimensional stability of materials used for semiconductor encapsulation and printed circuit board substrates.
• Liquid Crystal Polymers (LCPs): Acts as a mesogenic unit to modify the phase behavior and properties of LCPs for display and engineering plastic applications.
• Gas Separation Membranes: Incorporated into polymer matrices to create membranes with specific permeability and selectivity for industrial gas separation processes.
• Pharmaceutical Intermediates: Serves as a sophisticated chiral scaffold in the synthesis of complex active pharmaceutical ingredients (APIs).

Basic Information

Product Name	Spirobiindane
CAS No.	1568-80-5
Molecular Formula	C17H16
Molecular Weight	220.31 g/mol
Synonyms	Spiro[fluorene-9,9'-xanthene]; 9,9'-Spirobi[9H-fluorene]; 9,9'-Spirobifluorene; 2,2'-Spirobiindane; 9,9'-Spirobi[fluorene]; SBF; 9H,9'H-Spiro[fluorene-9,9'-xanthene]; 2,2'-Dihydro-1,1'-spirobi[indene]
EINECS	Contact for details

Quality Control

Our Spirobiindane is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to guarantee compliance with your technical requirements.

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 reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	242 - 248 °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.