1. industrial grade (technical grade or commercial grade)This is a pure chemical grade is low. The manufacturer usually does not certify the quantity, size and most often contaminants price. Per unit of weight or volume of the substance in other grades cheaper. This grade chemicals should be used when contaminants purity There is no adverse effect analysis, such as use as a desiccant. Use a glass cleaning agent or solvent. In some cases, etc. In addition, consider using when you need to use that type of large quantities of chemicals, and can be easily purified in the laboratory. This grade of chemicals should not be used as substances reacting (reagent) to quantitative analysis.
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