Stearic acid can be obtained by suppliers from a wide variety of raw materials of plant or animal origin. The feedstock is the cause of the different quality of the final product. Quality also depends on the manufacturer/supplier and brand of the product. There is no good or bad stearic acid , but the importance is choosing the right brand. Each application has its characteristics. The content of the basic substance is more or less clear. The higher this indicator, the more effective the use of the corresponding brand by suppliers. In the specifications for a particular brand, you need to look at the percentage for C18 (or, if C18: 0 is indicated, these are acids with a high molecular weight, including our stearic acid). The composition of impurities for polymer processing is not significant. It is more difficult to understand is the parameter of the iodine number. It shows how much iodine (in grams) will be enough to react with all substances having a double bond and contained ...