Description

3',6'-Bis(Dibutylamino)Spiro[Phthalide-3,9'-[9H]Xanthene] is a high-purity, specialized organic compound widely recognized for its unique photochromic and fluorescent properties. This compound matters for its critical role as a functional dye and a key intermediate in advanced material science. Industries requiring precise optical properties, such as developers of smart materials, security inks, and optical sensors, rely on this chemical. Its consistent quality and performance are essential for research and manufacturing processes where color change and light emission are fundamental.

Application

• Photochromic Materials: Primary component in lenses, windows, and smart glass that darken upon exposure to UV light.
• Security Printing: Used in the formulation of anti-counterfeiting inks for banknotes, certificates, and high-value product packaging.
• Optical Sensors: Acts as a sensitive probe or indicator in chemical and biological sensing applications due to its fluorescence.
• Research & Development: Serves as a crucial intermediate for synthesizing novel dyes and functional organic molecules in academic and industrial labs.
• Rewritable Paper & Data Storage: Explored for use in developing next-generation, light-responsive media for temporary information display.
• Polymer Modification: Incorporated into polymers to create light-sensitive plastics and coatings with tunable properties.

Basic Information

Product Name	3',6'-Bis(Dibutylamino)Spiro[Phthalide-3,9'-[9H]Xanthene]
CAS No.	41130-62-5
Molecular Formula	C₃₃H₄₀N₂O₃
Molecular Weight	512.69 g/mol
Synonyms	3',6'-Bis(dibutylamino)spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one; Spiro[phthalide-3,9'-xanthene], 3',6'-bis(dibutylamino)-; 3',6'-Bis(dibutylamino)fluoran; Black 305; ODB-2; Thermochromic Dye Black 305; 2'-Dibutylamino-6'-dibutylaminospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one
EINECS	Contact for details

Quality Control

Our 3',6'-Bis(Dibutylamino)Spiro[Phthalide-3,9'-[9H]Xanthene] is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to meet precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and related substances is provided with every shipment, supporting applications in sensitive R&D and manufacturing.

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 heat, open flames, and incompatible materials. Due to its light-sensitive nature, handling should be conducted under subdued lighting where practical to maintain product integrity.

Specification

Item	Specification
Appearance	Off-white to light gray crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	168 - 172 °C
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.