Description

5-Hydroxynaphthalene-1,8-Carbolactone is a specialized organic compound belonging to the naphthalene lactone class, serving as a versatile chemical intermediate. Its unique fused-ring structure makes it a valuable precursor in the synthesis of complex molecules, particularly in the development of advanced dyes, pigments, and functional materials. This product is essential for manufacturers and R&D laboratories in the fine chemical, pharmaceutical, and specialty materials sectors seeking high-purity building blocks for innovative applications.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of high-performance naphthalimide dyes, fluorescent brighteners, and organic pigments.
• Pharmaceutical Synthesis: Used as a building block in the research and development of active pharmaceutical ingredients (APIs) with complex polycyclic structures.
• Functional Material Production: Employed in the manufacture of organic semiconductors, photoconductive materials, and other advanced electronic chemicals.
• Analytical Chemistry: Serves as a standard or reagent in chromatographic analysis and spectroscopic studies due to its distinct chemical signature.
• Research & Development: A valuable compound for academic and industrial research in organic synthesis, material science, and chemical biology.

Basic Information

Product Name	5-Hydroxynaphthalene-1,8-Carbolactone
CAS No.	5656-88-2
Molecular Formula	C11H6O3
Molecular Weight	186.16 g/mol
Synonyms	5-Hydroxy-1H-naphtho[1,8-de][1,3]oxazin-1-one; 5-Hydroxy-1,8-naphthalic lactone; 5-Hydroxy-1,8-naphthalimide (lactone form); 1,8-Naphthalic anhydride, 5-hydroxy-; 5-Hydroxynaphthostyril; 5-Hydroxyperylene-3,4-dicarboxylic acid lactone; 5-Hydroxy-1H-benz[de]isoquinoline-1,3(2H)-dione (tautomeric form); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our 5-Hydroxynaphthalene-1,8-Carbolactone is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for fine chemical synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment and is available upon request.

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 incompatible materials. This product is light-sensitive and should be stored away from light as indicated in the chemical properties.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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