1,5-Diphenylcarbazide, commonly known by its CAS number 140-22-7, is a fascinating organic compound with significant utility in analytical chemistry. Its distinct chemical structure allows it to react with specific metal ions, forming colored complexes that can be quantitatively measured using spectrophotometric methods. This property makes it an invaluable tool for laboratory professionals aiming to purchase reliable reagents for precise metal analysis.

The most widely recognized application of 1,5-Diphenylcarbazide is its use in the colorimetric determination of chromium. In an acidic medium, it reacts with hexavalent chromium (Cr(VI)) to produce a characteristic red-violet color. The intensity of this color is directly proportional to the concentration of Cr(VI) in the sample. This method is highly sensitive and is routinely employed in environmental testing to monitor chromium levels in water and wastewater, as it is a toxic heavy metal. For laboratories conducting such tests, sourcing high-purity 1,5-Diphenylcarbazide from a trusted manufacturer is critical for accurate results. When considering where to purchase, looking for suppliers that guarantee a minimum purity of 95% will ensure reliable analytical performance.

Beyond chromium, 1,5-Diphenylcarbazide also finds application in the detection of other metal ions. It can be used to detect cadmium, mercury, and magnesium. For instance, it reacts with cadmium to form a yellow precipitate, and with mercury, it forms a white precipitate. While these reactions might not always be used for precise quantitative analysis as with chromium, they serve as useful qualitative or semi-quantitative indicators in specific analytical protocols. This broad applicability makes it a versatile reagent for a comprehensive chemical laboratory.

Furthermore, 1,5-Diphenylcarbazide is also recognized for its ability to react with aldehydes. This property can be exploited in specific analytical procedures where aldehyde detection is required. For researchers and formulators who need to purchase this reagent for these diverse applications, understanding its chemical behavior is key.

When procuring 1,5-Diphenylcarbazide, whether for routine chromium analysis or other metal and aldehyde detections, it is beneficial to work with established China suppliers. These manufacturers often provide competitive pricing and can offer different grades of the chemical to suit various needs. Inquiring about available stock, requesting a quote, or asking for a free sample can help you verify the product's suitability for your specific analytical method. The scientific community relies on the consistent performance of reagents like 1,5-Diphenylcarbazide, underscoring the importance of careful sourcing from reputable manufacturers.