Choline hydroxide solution, CAS: 123-41-1

Key Applications:

1. Hydrogen Production and Related Catalysis

• Base‑catalyzed hydrogen generation

Supports alcohol reforming, ammonia borane hydrolysis, and other hydrogen‑release reactions where strong, non‑volatile bases accelerate dehydrogenation.

• Transesterification and biodiesel synthesis

Functions as a greener alternative to sodium or potassium hydroxide, reducing soap formation and simplifying downstream purification.

• Phase‑transfer and organocatalysis

The hydroxide anion paired with a biocompatible cation enables selective C–C and C–O bond‑forming reactions under mild conditions.

2. CO₂ Capture and Adsorption

• Aqueous CO₂ absorption

Reacts with CO₂ to form bicarbonate and carbonate species, enabling reversible CO₂ uptake in mild, low‑temperature conditions.

• Hybrid IL–amine sorbent systems

Serves as a tunable alkaline component in ionic‑liquid‑based CO₂ capture formulations, improving absorption kinetics and reducing volatility.

• Regenerable sorbent media

Supports cyclic CO₂ capture–release processes due to its stability and low vapor pressure.

3. Biomass Processing and Green Chemistry

• Lignocellulosic deconstruction

Breaks ester and ether linkages in lignin and hemicellulose, improving sugar release for biofuel production.

• Cellulose dissolution and derivatization

Facilitates swelling, activation, and functionalization of cellulose under milder conditions than inorganic bases.

4. Polymer and Materials Applications

• Polymerization catalyst

Useful in ring‑opening polymerizations and curing reactions requiring strong, non‑nucleophilic bases.

• Surface modification

Employed in etching, activation, and functionalization of silica, metal oxides, and polymer surfaces.

5. Electronics and Microfabrication

• Photoresist stripping and cleaning

Provides controlled alkalinity for removing organic residues without the corrosivity of stronger mineral bases.

• Developer solutions

Used in certain lithographic processes where low‑volatility, aqueous alkaline developers are preferred.

6. General Synthetic and Analytical Uses

• pH control and buffering in alkaline media

Offers stable, low‑volatility alkalinity for reactions sensitive to inorganic salts.

• Quaternary ammonium precursor

Acts as a building block for synthesizing choline‑derived ionic liquids and functional salts.

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