Description

Dilithium 4,4'-Methylenebis[3-Hydroxy-2-Naphthoate] is a specialized organolithium salt derived from a bis-naphthoic acid structure, serving as a high-performance intermediate and functional additive. Its value lies in its unique dual-lithium cation chemistry, which provides enhanced reactivity and stability for advanced synthesis and material modification. This compound is essential for R&D chemists and process engineers in the pharmaceutical, polymer, and specialty chemical industries seeking to develop novel active ingredients or high-value functional materials.

Application

• Pharmaceutical Intermediate: Used in the synthesis of complex active pharmaceutical ingredients (APIs), particularly those requiring precise lithium-mediated coupling or carboxylate protection strategies.
• Polymer Catalyst/Co-catalyst: Functions as an efficient initiator or modifier in polymerization reactions, including the production of specialty polyesters and high-performance engineering plastics.
• Liquid Crystal & OLED Material Precursor: Serves as a key building block for creating organic electronic materials due to its rigid, conjugated naphthalene backbone and ionic character.
• Cross-linking Agent: Utilized to introduce ionic cross-links into polymer matrices, enhancing thermal stability and mechanical properties of coatings and composites.
• Lithium-ion Battery Research: Investigated as a potential component for solid polymer electrolytes or as an additive to improve ionic conductivity and electrode interface stability.
• Analytical Chemistry Reagent: Acts as a derivatization agent or a standard in chromatographic methods for analyzing complex organic mixtures.

Basic Information

Product Name	Dilithium 4,4'-Methylenebis[3-Hydroxy-2-Naphthoate]
CAS No.	59413-58-0
Molecular Formula	C23H12Li2O6
Molecular Weight	398.15 g/mol
Synonyms	4,4'-Methylenebis(3-hydroxy-2-naphthoic acid) dilithium salt; Dilithium 4,4'-methylenebis(3-hydroxy-2-naphthoate); 3,3'-(Methylenedi-4,1-naphthalenediyl)bis(2-hydroxy-4-oxo-4H-1-benzopyran) dilithium derivative; Bis(3-hydroxy-2-naphthoic acid) methane dilithium salt; 4,4'-Methylenebis[3-hydroxy-2-naphthoic acid] Li salt; Dilithium methylenebis(naphthoate); Light stabilizer intermediate 59413-58-0.
EINECS	Contact for details

Quality Control

Our Dilithium 4,4'-Methylenebis[3-Hydroxy-2-Naphthoate] is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and ICP-MS for metal content, to ensure it meets precise customer specifications and high-purity standards for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles 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). Due to its hygroscopic nature, the container must be kept tightly sealed after each use to minimize exposure to atmospheric moisture. Keep away from incompatible materials such as strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Lithium Content (ICP)	3.4 - 3.6%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Solubility (Test)	Soluble in polar aprotic solvents

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