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Description
TCI C2100 4'-Chloro-2',5'-dimethoxyacetoacetanilide is an acetoacetanilide derivative whose aniline ring carries one chlorine atom and two methoxy groups. The compound belongs to the family of non-heterocyclic building blocks and is widely recognised as a coupling component in the formation of azo dyes and pigments. In the laboratory it serves as a reaction partner for diazonium salts: the active methylene group positioned between the two carbonyls of the acetoacetyl chain is readily attacked, so that coupling reactions proceed with consistent yields and with product colours that researchers can anticipate before the reaction is run.
The properties that make this material a preferred choice lie in the combination of its reactivity and the regularity of its structure. The active methylene group provides high reactivity towards electrophiles, while the two methoxy groups on the aromatic ring contribute electron density that influences both the colour shade and the durability of the resulting pigment. The chlorine atom adds electronic weight and plays a role in the strength of intermolecular interactions within the pigment, which in turn relates to resistance against light and solvents. The material exists as a solid, so it can be weighed accurately, is practical to store, and does not demand specialised transfer equipment.
In Indonesian laboratories this building block is typically encountered in synthetic organic chemistry groups, in colourant and pigment research, and in materials chemistry work at universities, government research institutes, and industrial development units. Because it is supplied as a solid in defined pack sizes, it suits both small-scale exploratory couplings and repeated preparations across a series of experiments, and it fits comfortably into routine bench workflows where reproducibility between batches of work matters to the research team.
Laboratory Applications
Azo dye synthesis — the active methylene site couples cleanly with diazonium salts, giving reproducible yields and colour outcomes that can be predicted from the substitution pattern of the ring.
Azo pigment preparation — the chlorine and methoxy substituents shape intermolecular interactions in the finished pigment, which relates directly to its resistance to light and to solvents.
Colourant structure–property studies — the two methoxy groups supply electron density on the aromatic ring, making this a useful substrate for examining how substitution influences the resulting colour shade.
General non-heterocyclic building block work — the acetoacetyl chain offers a reactive handle for electrophilic partners, so the compound serves as a starting point in multi-step organic preparations.
Method development and repeat preparations — the solid physical form allows accurate weighing and straightforward handling, supporting consistent results when a coupling procedure is run repeatedly.
Specifications
Brand: TCI
CAS number: 4433-79-8
Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Pack sizes: available in the pack sizes listed on this product page
Physical form: solid
Storage: keep in the closed original container under the conditions stated by the manufacturer
Handling and Storage
Store the material in its original tightly closed container, kept in a cool, dry, and well-ventilated place away from direct sunlight, moisture, and sources of ignition. Glass or chemically compatible plastic containers with secure closures are suitable for any portions transferred for laboratory use, and each portion should be clearly labelled. Handle the solid in a fume hood or a well-ventilated area, wear a laboratory coat, safety glasses, and chemical-resistant gloves, and avoid raising dust while weighing. Keep containers closed when not in use, clean any spillage promptly, and consult the manufacturer's safety data sheet before first use.
