For any laboratory professional or researcher, a thorough understanding of the chemicals they work with is fundamental. Today, we focus on alpha-Naphtholphthalein (CAS 596-01-0), a compound valued for its specific chemical and physical attributes that make it a reliable tool in analytical chemistry and beyond.

Alpha-Naphtholphthalein, with the molecular formula C28H18O4 and a molecular weight of approximately 418.45 g/mol, is a solid compound. Its appearance is often described as a dark pink to brown powder. When it comes to solubility, alpha-Naphtholphthalein exhibits a crucial characteristic: it is practically insoluble in water but readily dissolves in ethanol. This difference in solubility is important for preparing solutions for various applications, such as its use as a pH indicator.

The primary function for which alpha-Naphtholphthalein is known is its role as a pH indicator. It undergoes a distinct color change within a pH range of approximately 7.3 to 8.7. Below this range, it appears colorless or reddish, while above it, it transitions to a blue or greenish-blue hue. This well-defined transition point makes it exceptionally useful for acid-base titrations where precise endpoint detection is required. Researchers seeking to buy alpha-Naphtholphthalein for such analytical tasks can rely on its predictable behavior.

Beyond its indicator properties, alpha-Naphtholphthalein has also been noted for its use in the preparation of certain chemical compounds, including those incorporated into laminated boards or materials requiring enhanced heat resistance. This points to its broader applicability in chemical synthesis and material science. The availability of alpha-Naphtholphthalein from suppliers like NINGBO INNO PHARMCHEM CO.,LTD. ensures that these varied applications can be supported with a quality product.

Understanding these chemical properties – its solid form, specific solubility, and predictable color transition – is vital for anyone utilizing alpha-Naphtholphthalein. Whether for standard laboratory analysis or for innovative research projects, a clear grasp of these attributes ensures optimal performance and reliable results.