Description

2-Methyl-3,3'-Spirobi[3H-Naphtho[2,1-B]Pyran] is a specialized organic compound belonging to the spirobi[naphthopyran] class, known for its unique photochromic properties. This compound matters for its ability to undergo a reversible color change upon exposure to specific wavelengths of light, making it a critical functional material. It is primarily needed by manufacturers in the advanced materials, optical data storage, and smart coating industries seeking to develop light-responsive products.

Application

• Photochromic Lenses and Ophthalmic Materials: As a key organic photochromic dye for plastic eyeglass lenses and visors that darken upon exposure to sunlight.
• Optical Data Storage and Security Inks: Utilized in the development of rewritable optical media and security printing inks for anti-counterfeiting applications.
• Smart Windows and Light-Regulating Films: Incorporated into polymeric matrices for windows, sunroofs, or films that automatically adjust their tint based on light intensity.
• Non-linear Optical (NLO) Materials: Serves as a building block for advanced materials used in photonics and optoelectronic devices.
• Chemical Sensing and Imaging: Employed in the design of molecular probes and sensors for biological or environmental imaging due to its fluorescence switching capability.
• Academic and Industrial R&D: Used as a high-purity reference standard and intermediate in synthetic chemistry research for novel photochromic systems.

Basic Information

Product Name	2-Methyl-3,3'-Spirobi[3H-Naphtho[2,1-B]Pyran]
CAS No.	10318-38-4
Molecular Formula	C27H20O2
Molecular Weight	376.45 g/mol
Synonyms	2-Methyl-3,3'-spirobi[2H-naphtho[2,1-b]pyran]; 2-Methyl-3,3'-spirobi[3H-naphtho[2,1-b]pyran]; 2-Methyl-spiro-(3H-naphtho[2,1-b]pyran-3,3'-[3H]naphtho[2,1-b]pyran); Spiro[3H-naphtho[2,1-b]pyran-3,3'-[3H]naphtho[2,1-b]pyran], 2-methyl-; Photochromic Spironaphthopyran Derivative
EINECS	Contact for details

Quality Control

Our 2-Methyl-3,3'-Spirobi[3H-Naphtho[2,1-B]Pyran] is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets the high standards required for photochromic applications. Certificates of Analysis (COA) detailing purity, related substances, and physical properties are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This compound is light-sensitive (store away from light) and should be handled under inert atmosphere when appropriate to prevent degradation.

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%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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