Description

3,3'-Spirobi[3H-Naphtho[2,1-B]Pyran] is a specialized organic compound belonging to the spirocyclic and naphthopyran class of chemicals. This compound is valued for its unique photochromic properties, making it a critical functional material in advanced optical applications. It is primarily sought by manufacturers in the photochromic lens, smart window, and optical data storage industries for developing light-responsive materials and devices.

Application

• Key functional component in the formulation of photochromic ophthalmic lenses and sunglasses.
• Advanced material for smart windows and light-adjusting architectural glass.
• Research and development of novel optical switches and sensors.
• Potential use in optical data storage and photonic devices.
• Intermediate for synthesizing more complex functional dyes and organic pigments.
• Academic and industrial R&D in materials science and photochemistry.

Basic Information

Product Name	3,3'-Spirobi[3H-Naphtho[2,1-B]Pyran]
CAS No.	178-10-9
Molecular Formula	C29H18O2
Molecular Weight	398.45 g/mol
Synonyms	3,3'-Spirobi[3H-naphtho[2,1-b]pyran]; 3,3'-Spiro[3H-naphtho[2,1-b]pyran]; 3,3'-Spirobi(3H-naphtho[2,1-b]pyran); Spirobi(naphthopyran); Photochromic Spironaphthopyran; SNPO; Spiro[3H-naphtho[2,1-b]pyran-3,3'-[3H]naphtho[2,1-b]pyran]
EINECS	205-851-9

Quality Control

Our production of 3,3'-Spirobi[3H-Naphtho[2,1-B]Pyran] adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability for optical applications. Quality is verified through advanced analytical techniques including HPLC, NMR, and UV-Vis spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and performance-related parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is light-sensitive (store away from light) and should be handled under appropriate conditions to prevent premature activation or degradation of its photochromic properties.

Specification

Item	Specification
Appearance	Yellow to light brown crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Photochromic Performance	To be specified per grade

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