Consult indicator dyes
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Seeking a chemical that appears as a red-brown powder or particles, is soluble in water; in its aqueous solution it turns red in a strongly oxidizing environment, and remains colorless in a reduced state. As the concentration of oxidizing substances decreases, the red color fades until it becomes colorless. Some say it is a type of indicator dye; who produces this product?
Like potassium permanganate? ? ? ? ? ? ? ? ;P
A pilot test was conducted; it wasn’t potassium permanganate, so it seems we still need to look for another option. . .
Thank you. I just checked – neutral red appears green, while the substance I’m looking for is red in color; it turns red in water containing oxides, and as the concentration of oxides decreases, the red color fades.
Could you please share the purpose and requirements for which you are looking for this substance? Is it used for chemical analysis or process control? It’s hard to guess without any relevant direction :)
We are mainly used in solid disinfectants. The disinfectant is available in white granular form; it is highly oxidizing and becomes colorless when dissolved in water. Currently, there is an imported version that is red in appearance and turns red when dissolved in water. I thought it was a pigment; once added, it was immediately degraded and turned colorless. Later, I heard from colleagues that an indicator dye was added; the specific components are not very clear.
This post was last edited by Yang Qing on 2021-6-2 at 13:05. Do you mean that the disinfectants you produce should also come in a form with redox indicators? Imported disinfectants from abroad are more practical due to their color-indication feature, allowing one to easily see if an excessive amount has been used. If they add a certain proportion of indicators such as neutral red during the synthesis process and incorporate it into the final product, the resulting product may appear red in color. Such imported products may not simply involve mixing an indicator with a disinfectant; perhaps they are synthesized together during the production process and added in proportion. So the product appears red, and it remains red when dissolved in water; once the oxidizing agent is used up during use, it becomes colorless.
Everything imported is processed domestically; I asked the processing company, and it’s just mixed later on.
Neutral red appears green; does it turn red when mixed with your disinfectant? I’m wondering if any other friends can provide some guidance on this issue.