Lithium Hydroxide

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Overview of Lithium Hydroxide

Lithium hydroxide (LiOH) is a versatile inorganic base used in energy storage, industrial lubrication, ceramics, and specialty chemical manufacturing. Its strong alkalinity, affinity for carbon dioxide and moisture, and role in forming high-performance lithium salts make it essential to modern battery supply chains and advanced processes. Offered as anhydrous lithium hydroxide and as monohydrate LiOH·H2O, it is selected by purity, particle size, and phase to meet specific requirements. 

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Chemical and Physical Properties

Formula and Dissociation

Anhydrous lithium hydroxide has the formula LiOH, while monohydrate is LiOH·H2O. In water, LiOH dissociates into lithium cations (Li+) and hydroxide anions (OH⁻), yielding strongly basic solutions. Both anhydrous and monohydrate lithium hydroxide provide rapid alkalinity in aqueous systems.

Appearance and Handling

Commercial grades are typically white, hygroscopic pellets, flakes, or powders. Monohydrate is common due to easier handling and slightly reduced causticity compared with the anhydrous form. Lithium hydroxide should be handled in dry conditions to limit moisture pickup.

Solubility and Reactivity

Lithium hydroxide is highly soluble in water and slightly soluble in alcohols. It readily absorbs moisture and carbon dioxide from the air, forming lithium carbonate on exposure. It neutralizes acids to produce lithium salts and can precipitate metal hydroxides from solution. Properly sealed storage helps prevent caking and unwanted carbonate formation in both anhydrous and hydrated grades of lithium hydroxide.

Safety and Handling

As a caustic material, lithium hydroxide requires appropriate PPE, storage in closed containers, and careful handling to minimize exposure and moisture uptake. For anhydrous lithium hydroxide, use airtight containers and keep away from acids and CO2 sources. Refer to the SDS for specific lithium hydroxide first aid and storage guidance.

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Production Methods

From Lithium Resources

Production begins with lithium brines or hard rock ores, such as spodumene. Brines are concentrated, purified, and converted into intermediates like lithium carbonate or lithium chloride. Spodumene is calcined and leached to yield lithium sulfate or carbonate solutions, which are further processed to produce lithium hydroxide.

Chemical Conversion Routes

A widely used pathway is causticization of lithium carbonate with lime, producing lithium hydroxide and a calcium carbonate byproduct that is subsequently separated. Alternative processes convert lithium chloride to lithium hydroxide via electrolysis or membrane-based systems, often achieving lower impurity levels in battery-grade anhydrous lithium hydroxide.

Refining and Quality Control

Downstream steps include filtration, decarbonation, ion exchange, and controlled crystallization to meet battery-grade limits for sodium, potassium, calcium, iron, and sulfate. In-process monitoring of conductivity, pH, and trace metals helps support consistency, and final analysis verifies the assay, moisture content, particle size distribution, and carbonate levels.
 

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Applications and Uses

Battery and Energy Storage

Increased electric vehicle production and grid storage are driving demand for lithium hydroxide. Lithium hydroxide is the preferred precursor for high-nickel cathodes, such as NCA and NMC 8xx, enabling lower sintering temperatures and enhanced stability compared with lithium carbonate. Tight control of sodium and metal impurities is vital to performance, cycle life, and gas management. Both monohydrate and anhydrous grades of lithium hydroxide are specified depending on process requirements.
 

Lubricants and Greases 

Lithium hydroxide reacts with fatty acids to form lithium-soap thickeners for lithium and lithium-complex greases. These greases deliver mechanical stability, water resistance, and high drop points, making them ideal for automotive, industrial, and heavy equipment bearings.
 

Ceramics and Glass

Lithium hydroxide acts as a flux that lowers melting temperatures, reduces thermal expansion, and improves glaze durability. It is used as a processing alkali or pH adjuster in slips and glazes, supporting dispersion and surface quality.

Lithium hydroxide is utilized in additional applications, including carbon dioxide scrubbing for life support systems, pH control in specialty synthesis, and as a precursor to lithium salts for polymers and air-treatment media.
 

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About ChemPoint

At ChemPoint, we help customers find the right chemical solutions for their needs. We are a leader in the marketing, sales, and distribution of specialty and fine chemicals across North America and Europe, and a proud partner of Livent in the United States. We provide lithium materials to the industrial sector, including monohydrate lithium hydroxide. Contact us today to speak with a technical specialist about lithium hydroxide!