2,4-Dichloro-1-naphthol [for photography] TCI D0383

Chemical Identity

CAS No.: 2050-76-2
PubChem: CID 16313·SID 87567066
Formula: C10H6Cl2O
Molecular weight: 213.06 g/mol
Purity: >97.0%(GC)(T)

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: 2,4-dichloronaphthalen-1-ol
SMILES: C1=CC=C2C(=C1)C(=CC(=C2O)Cl)Cl
InChIKey: HVLJEMXDXOTWLV-UHFFFAOYSA-N
MDL: MDL00003931

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TCI D0383 2,4-Dichloro-1-naphthol is a naphthol derivative with two chlorine atoms at positions 2 and 4 of the naphthalene ring and one phenolic hydroxyl group at position 1. TCI labels this product "for photography," which means it is prepared for use in photographic chemistry. It is also a non-heterocyclic building block in the laboratory. Researchers use it to synthesise halogenated naphthalene derivatives and to study the reactivity of fused aromatic phenolic compounds.

Chemists choose this material because its framework pairs the rigid aromatic system of naphthalene with a reactive phenolic hydroxyl group. That hydroxyl group can be converted readily into ethers, esters, or other derivatives. The two chlorine substituents change the electronic character of the ring and block the positions that are usually most reactive in 1-naphthol. Further reactions therefore follow a more controlled pattern. This helps researchers design synthetic routes with clearer selectivity than they would get from unsubstituted naphthol.

In Indonesia, compounds of this type are widely used in university organic chemistry laboratories, materials research institutions, and industrial development laboratories that study aromatic substances. Academic groups may use it in synthesis coursework, final-year research projects, and studies of substituent effects on aromatic rings. Research and development teams may use it as a starting material when screening new halogenated aromatic intermediates. Laboratories working on photographic or imaging chemistry can also use the grade designated for that purpose.

Related TCI products

Photographic chemistry work: the product is supplied with TCI's "for photography" designation, so it suits laboratories that study or prepare photographic chemical formulations.
Synthesis of halogenated naphthalene derivatives: the two chlorine atoms already on the ring make it a practical starting point for building more complex chlorinated naphthalene structures.
Etherification and esterification studies: the reactive phenolic hydroxyl group at position 1 can be converted into ethers, esters, and related derivatives for further synthetic steps.
Regioselectivity research: chlorine blocks positions 2 and 4, which are normally the most reactive sites in 1-naphthol, so researchers can study how reactions are directed to the remaining positions.
Teaching and research on substituent effects: it is a clear example of how halogen substituents change the electronic properties and reactivity of a fused aromatic phenolic system.

Brand	TCI (product code D0383)
CAS number	2050-76-2
Molecular formula	—
Purity	—
Category	Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Pack sizes	as listed for this product code; please confirm the available packaging when you order
Physical form	—
Storage	follow the conditions on the TCI label and Safety Data Sheet

Grade designation: for photography

Store this material in its original tightly closed container in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible substances such as strong oxidising agents. Reseal the container promptly after each use to limit exposure to moisture and air. Handle the compound in a fume hood or well-ventilated area. Wear suitable personal protective equipment, including laboratory gloves, safety glasses, and a lab coat. Avoid inhaling dust and avoid contact with skin and eyes. Always read the TCI Safety Data Sheet before use, and dispose of residues according to local laboratory and environmental regulations.

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