5-Chloro-2-Nitrotoluene CAS 5367-28-2

Its position in the pigment industry can be regarded as one of its most commercially valuable uses.
It is a key raw material for the preparation of 6-chloro-3-aminotoluene-4-sulfonic acid. 6-Chloro-3-aminotoluene-4-sulfonic acid is an important intermediate for the synthesis of two major red organic pigments, C.I. Pigment Red 52 and C.I. Pigment Red 53 (Golden Light Red C). These two pigments are known for their bright color, strong coloring power, and good weather resistance, and are widely used in fields such as coatings, inks, and plastic coloring.

In other words, without this substance, there would be no efficient synthesis route for these two classic red pigments. In the pigment industry chain, it plays the role of a "bridge" between basic chemical raw materials and terminal color products, and is the core hub connecting upstream petrochemical and downstream color industries.

The economic value of this use is extremely considerable. Taking pigment red 53 (Golden Light Red C) as an example, its annual demand in the fields of printing ink and plastic coloring is in the tens of thousands of tons, and behind each ton of pigment, the stable supply of 5-chloro-2-nitrotoluene, a key upstream intermediate, is indispensable.

In the pharmaceutical field, it is clearly labeled as a pharmaceutical intermediate, with applications covering multiple drug synthesis routes.
As a halogenated nitrotoluene compound, it carries three active functional groups: chlorine atom, nitro group, and methyl group in its molecule, which makes it highly controllable in subsequent reactions - chlorine atom can be nucleophilically substituted, nitro group can be reduced to amino group, and methyl group can be oxidized to carboxyl group. This "three functional group" characteristic makes it an ideal starting point for constructing complex drug molecular frameworks.

Specifically, it can be used to synthesize various chlorinated aromatic amine compounds, which are further derived into drug active molecules. In the development and production of anti-tumor drugs, antibacterial drugs, and anti-inflammatory drugs, the chlorinated aromatic amine structural unit frequently appears, and it is precisely the efficient precursor for constructing this structural unit.
In addition, according to toxicological data, the compound exhibits mutagenicity at a concentration of 1 mmol/L in human cervical cells, which indirectly indicates its special value in the study of bioactive molecules - it is both a synthetic tool and a reference for toxicity research.

Chemical raw materials in the field of plant protection. In the field of pesticide synthesis, it is also an important intermediate that cannot be ignored.

Chlorinated nitroaromatic compounds are the structural basis of various herbicides, insecticides, and fungicides. Through reactions such as nitro reduction, chlorine atom substitution, or methyl oxidation, it can be converted into precursors of various pesticide active ingredients.

For example, in the synthesis route of certain new herbicides, the product obtained by reduction can further react with isocyanates or acyl chlorides to generate urea or amide compounds with herbicidal activity. These compounds have the characteristics of high efficiency and low toxicity in chemical control of farmland.

Although not as well-known as the previous ones, this use is highly technical.
It is clearly used for synthesizing diazo photosensitive materials. Diazo photosensitive materials are core functional materials in fields such as photolithography, plate making, and printing, and their working principle relies on the decomposition reaction of diazo compounds under illumination.

As a raw material, diazonium salts with specific structures can be synthesized for the preparation of high-sensitivity and high-resolution photosensitive elements.
In addition, the compound has also been mentioned for special application scenarios such as microwave photography. Microwave photography technology has unique value in cutting-edge fields such as non-destructive testing and medical imaging, and its specific compounds can serve as functional materials in this technology.

In the field of scientific research, the uses of 5-chloro-2-nitrotoluene are equally diverse:
In terms of materials science, its derivatives can be used for research on liquid crystal materials. Downstream products such as 4-methyl-3-nitrobiphenyl have potential applications in the fields of new display materials and functional films.

In terms of biochemistry, as a halogenated nitroaromatic compound, it has reference value in mutagenicity research. The mutation experiment data of human cervical cells at a concentration of 1 mmol/L makes it one of the commonly used compounds for genetic toxicity screening.
In terms of analytical chemistry, its clear UV absorption characteristics and electrochemical behavior make it suitable as a standard for instrument calibration and method validation.