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How to classify chemical reagents

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How to classify chemical reagents

Chemical reagent is a kind of fine chemicals with various purity standards, which can be used for teaching, scientific research, analysis and testing, and can be used as pure and ultra pure functional materials and raw materials for some emerging industries. Generally, it can be classified by composition and purity. It is not only an important tool for modern scientific research and product inspection, but also an indispensable material for emerging technology.


According to the major categories, chemical reagents can be divided into 11 categories: General inorganic reagents, general organic reagents, high-purity inorganic reagents, high-purity organic reagents, general analytical reagents, instrumental analytical reagents, biochemical and molecular biological reagents, clinical laboratory reagents, isotope reagents, special chemicals and other reagents.

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Chemical reagents can also be divided into high-purity reagents, high-grade pure reagents, analytical pure reagents, etc. The specifications of chemical reagents in China are basically classified according to purity. The quality indicators issued by the state and competent departments mainly include superior grade purity, analytical purity, chemical purity and experimental purity.


Chemical reagents of different colors

1. High grade purity (GR, green label) (grade I): high content of main components, high purity, suitable for analysis and research, some can be used as reference materials.

2. Analytical purity (AR, red label) (grade II): high content of main components, high purity, low interference impurities, suitable for industrial analysis and chemical experiments.

3. Chemical purity (CP, blue label) (grade III): high content of main components, high purity, interference impurities, suitable for chemical experiments and synthetic preparation.

4. Experimental purity (LR, yellow label): high content of main components, poor purity, no choice of impurity content, only suitable for general chemical experiments and synthetic preparation.


In addition to the above four levels, there are: Reference Reagent (PT): specially used as reference material, which can be directly prepared into standard solution. Spectral purity reagent (SP): indicates spectral purity. However, due to the fact that the organic matter can not be displayed in the spectrum, sometimes the principal component is less than 99.9%, so we must pay attention to it when using it, especially when it is used as a reference substance. The reagent whose purity is much higher than that of superior grade is called high purity reagent (I > 99.99%). High purity reagents are developed on the basis of general reagents. High purity reagents are especially suitable for trace analysis.


More than 95% of the biochemical reagents produced and developed by Desheng include chromogenic reagents, biological buffers, blood collection additives, chemiluminescence reagents, etc., which are analytical pure reagents with high purity. The company covers an area of 3000 square meters, has modern clean workshop and advanced production equipment, strong technical force, a number of professional R & D teams, and advanced and complete analytical detectors The perfect quality inspection and quality assurance system ensure that we provide stable high-quality products to the market. We warmly welcome all major enterprises to visit our company.

Pub Time : 2021-01-28 20:15:34 >> News list
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