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[Chemical Knowledge]：What is the difference between chemically pure and analytically pure?

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Chemical purity and analytical purity are two purity standards commonly used in laboratories, and they play an important role in chemical reagents and laboratory experiments. However, many people are not clear about these two concepts and are often confused. This article will detail the difference between chemical purity and analytical purity to help you better understand these two purity standards.

chemical purity and analytical purity are purity standards for chemical reagents. Chemical purity refers to the purity requirements used as standards and analytical reagents in chemical experiments, usually requiring a purity of more than 99.9%. Analytical purity refers to the purity requirements for analytical chemistry experiments, usually requiring a purity of more than 99.99 percent. From the perspective of purity requirements, analytical purity requirements are higher, so in some experiments that require extremely high purity, analytical reagents need to be used.

from the application field, chemical purity is more used in general chemical experiments and general applications, while analytical purity is more used in high-precision analysis experiments and experiments with extremely high purity requirements. For example, for general basic chemical experiments in regular laboratories, chemically pure reagents are usually selected; while for experiments with extremely high purity requirements in some high-end analytical laboratories, analytical pure reagents are selected.

For ordinary laboratories, chemical purity and analytical purity are often substitutes for each other. Because in general experiments, the requirements for purity are not particularly high, the use of chemically pure reagents is sufficient to meet the requirements of the experiment. However, analytical reagents are usually more expensive. If there is no special high purity requirement, most experiments can be completed by using chemical pure reagents.

In general, chemical purity and analytical purity differ in purity requirements and application areas. When selecting the use, it is necessary to determine which purity reagent to use according to the specific requirements of the experiment. I hope this article is helpful for everyone to better understand chemical purity and analytical purity.

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