Ammonium carboxymethyl cellulose (CMC-NH₄) is a specialized cellulose derivative characterized by its exceptional solubility in water and alkaline aqueous solutions. Unlike the more common sodium-based CMC (CMC-Na), CMC-NH₄ leaves virtually no ash or residual metal ions upon thermal decomposition, making it highly valuable for high-tech industrial applications. Key Properties Solubility: Readily soluble in water, aqueous alkali, and ammonia solutions. Ash-Free Thermal