Many people don't know that sodium tripolyphosphate(STPP) is not only used in water treatment agents, surfactants and food additives, but also widely used as an important detergent additive in synthetic detergents, as well as in ceramics production. Therefore, the demand for STPP in the market remains high. In order to prevent some malicious business, CD will tell you how to distinguish genuine or imitative STPP.
First, the appearance of STPP. It has a white granule or powder appearance. Those who have been exposed to high quality STPP should be aware that it should feel like an expanded particle or powder. If you pinch it and it's loose and sticky, you need to pay attention to it!
Secondly, take clear water and dissolve proper amount of STPP of CD in water. The genuine sodium tripolyphosphate solution should be clear and transparent. If you add the same amount of products you buy one day and it turns cloudy, please pay attention to it!
Thirdly, take a little dilute soapy water and dissolve it with tap water to get milky and cloudy liquid (because calcium and magnesium ions in tap water will form soap scale with soap). It's genuine STPP that if you add a little bit of STPP, you can make the liquid clear. But if you have added a lot of STPP, and it stays the same, please pay attention to it!
