2-Chloro-1,4-naphthoquinone
[CAS# 1010-60-2]

Identification

• Classification: Chemical reagent >> Organic reagent >> Polycyclic compound
• Name: 2-Chloro-1,4-naphthoquinone
• Molecular Formula: C₁₀H₅ClO₂
• Molecular Weight: 192.60
• CAS Registry Number: 1010-60-2
• EC Number: 213-776-2
• SMILES: C1=CC=C2C(=C1)C(=O)C=C(C2=O)Cl

Safety Data

• Hazard Symbols: GHS06;GHS07 Danger
• Hazard Statements: H301-H315-H319-H335-H412
• Precautionary Statements: P261-P264-P264+P265-P270-P271-P272-P273-P280-P301+P316-P302+P352-P304+P340-P305+P351+P338-P319-P321-P330-P332+P317-P333+P317-P337+P317-P362+P364-P403+P233-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Skin sensitization	Skin Sens.	1	H317
Acute toxicity	Acute Tox.	3	H301
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Eye irritation	Eye Irrit.	2A	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335

Discovory and Applicatios

2-Chloro-1,4-naphthoquinone (2-Cl-NQ) is a chlorinated derivative of 1,4-naphthoquinone. The compound is characterized by a chlorine atom at the 2-position of the quinone structure. It is a yellow to orange solid crystalline, slightly soluble in water and more soluble in organic solvents such as ethanol and chloroform. It exhibits quinone-like reactivity and can be used in redox reactions and as a precursor for organic synthesis. The development of 2-chloro-1,4-naphthoquinone stems from the extensive exploration of naphthoquinone in the early 20th century. Naphthoquinone has attracted attention for its unique redox properties and biological activity. The introduction of chlorine into the naphthoquinone structure was intended to study how halogenation affects the chemical and biological properties of quinones. 2-Cl-NQ was thus synthesized.

2-Chloro-1,4-naphthoquinone is widely used as an intermediate in organic synthesis. It is a building block for the production of various derivatives, including drugs, dyes, and agrochemicals. Its quinone structure and chlorine substituent have unique reactivity that can promote a variety of chemical transformations. The chlorine atom on the quinone ring makes 2-Cl-NQ a suitable substrate for nucleophilic substitution reactions. Taking advantage of this property, a series of functionalized naphthoquinones have been synthesized by replacing chlorine with different nucleophiles.

2-Chloro-1,4-naphthoquinone and its derivatives have antimicrobial properties, making them potential candidates for the development of antibacterial and antifungal agents. Their ability to interfere with microbial metabolic pathways provides the basis for new therapies against drug-resistant strains. Research has also explored the potential of 2-chloro-1,4-naphthoquinone in anticancer therapy. Its quinone moiety can undergo redox cycling, generating reactive oxygen species (ROS), which can induce oxidative stress and apoptosis in cancer cells. This mechanism is being studied for cancer treatment.

2-Chloro-1,4-naphthoquinone is used as a precursor for the synthesis of dyes and pigments. It is able to form brightly colored complex chromophores and is valuable for the production of various colorants used in textiles, inks, and coatings. It is also used as a stain in histological and biological studies, and is able to selectively stain certain biological structures, facilitating the observation of tissues and cells under a microscope.

2-Chloro-1,4-naphthoquinone is used as a probe to study the mechanisms of redox reactions in biological systems. Its ability to undergo redox cycling provides insights into the role of quinones in cellular metabolism and oxidative stress. 2-Chloro-1,4-naphthoquinone is used to study the inhibition of enzyme systems, especially those involved in redox processes. Its interactions with enzymes and proteins provide valuable data for understanding biochemical pathways and developing enzyme inhibitors.

2-Chloro-1,4-naphthoquinone has potential in environmental applications, such as the degradation of pollutants. Its redox properties allow it to participate in the decomposition of organic pollutants in water and soil, aiding environmental remediation efforts. 2-Chloro-1,4-naphthoquinone is used in analytical chemistry to detect and quantify trace pollutants in environmental samples. Its reactions with a variety of analytes can be used to develop sensitive detection methods for monitoring pollution levels.