Factory Supply High Purity Ammonium Chloride with Good Price

Product Name: Ammonium chloride
CAS Number: 12125-02-9
Molecular Formula: NH₄Cl
Molecular Weight: 53.49 g/mol
Appearance: White crystalline powder or colorless crystals

Ammonium chloride is an inorganic salt with the formula NH₄Cl. It appears as a white crystalline powder or colorless crystals, is odorless, and has a cool, saline taste. It dissolves readily in water, and its aqueous solution is mildly acidic. It is sparingly soluble in lower alcohols and practically insoluble in nonpolar media. When heated, it sublimes and dissociates into hydrogen chloride; cooling allows recombination. It is hygroscopic under humid conditions and should be kept in a tightly closed container in a cool, dry place. Functionally, Ammonium chloride is used as an electrolyte in dry cells, a flux in metalworking and soldering, a buffering and pH-adjusting agent, and a source of ammonium ions in laboratory and industrial processes. In medicine, it has been used as an expectorant and acidifying agent. In food processing, it serves as a yeast nutrient and flavor enhancer in certain products. It is also employed in textile dyeing, leather treatment, and analytical chemistry. The compound is generally regarded as safe when handled properly, but dust may irritate eyes, skin, and respiratory passages. It is noncombustible and stable under ordinary storage conditions. Use appropriate protective equipment and ventilation. Store away from strong oxidizers and moisture.

For regulatory compliance (e.g., USP, EP, JP), raw material Vidarabine must meet several rigorous standards:

• Assay (by HPLC): 98.0% – 102.0% on an anhydrous basis.

• Related Substances: Limits for specific impurities, notably Ara-Hx (NMT 2.0%), as well as any unspecified individual impurity (NMT 0.1%) and total impurities (NMT 2.0%).

• Residual Solvents: Must comply with ICH Q3C guidelines (Class 1 and 2 solvents limited or absent).

• Heavy Metals: NMT 20 ppm (typically lower for injectable grades).

• Water Content (Karl Fischer): NMT 6.0% (the material is hygroscopic to a degree).

• Microbial Limits: Total aerobic microbial count (TAMC) ≤ 1000 CFU/g, absence of S. aureus, P. aeruginosa, and Candida albicans.