55720-34-8

Basic information

• Product Name: 1,2,7-TRICHLORONAPHTHALENE
• Synonyms: 1,2,7-TRICHLORONAPHTHALENE;PCN-17
• CAS NO: 55720-34-8
• Molecular Formula: C₁₀H₅Cl₃
• Molecular Weight: 231.51
• Mol File: 55720-34-8.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 322.3°Cat760mmHg
• Flash Point: 220°C
• Appearance: /
• Density: 1.452g/cm³
• Vapor Pressure: 0.00053mmHg at 25°C
• Refractive Index: 1.659
• CAS DataBase Reference: 1,2,7-TRICHLORONAPHTHALENE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,7-TRICHLORONAPHTHALENE(55720-34-8)
• EPA Substance Registry System: 1,2,7-TRICHLORONAPHTHALENE(55720-34-8)

Safety Data

• Hazardous Substances Data: 55720-34-8(Hazardous Substances Data)

Usage

Chemical Structure

A naphthalene ring with three chlorine atoms attached at the 1, 2, and 7 positions.

Classification

Member of the polychlorinated naphthalenes (PCNs) group.

Group

Persistent organic pollutants (POPs).

Harmful Effects

Can be harmful to human health and the environment.

Uses

Manufacturing of pesticides, flame-retardants, and as an intermediate in the synthesis of other chemicals.

Toxicity

Considered to be toxic.

Health Effects

Potential effects on the liver, kidneys, and central nervous system.

Persistence

Due to its persistence and potential for bioaccumulation.

Regulation

Regulated and its use is restricted in many countries.

InChI:InChI=1/C10H5Cl3/c11-7-3-1-6-2-4-9(12)10(13)8(6)5-7/h1-5H

Relevant articles and documents

Formation of polychlorinated naphthalenes on fly ash

During the oxidative degradation of carbonaceous material on fly ash, besides PCDD/F, PCPh, PCBz, PCB, polychlorinated naphthalenes (PCN or Cl(x)N) are formed. Thermal experiments were carried out with fly ash from a municipal waste incinerator at 300°C and reaction times of 0.5 h up to 4 h. For the study an analytical method using GC/MS was developed similar to that, used in dioxin-analysis. Isomer specific identification of chloronaphthalenes formed on fly ash was realized by comparison of Cl(x)N from technical PCN- mixtures (Halowax). For quantification of the PCN formed, 13C- labelled PCB-standards were used as internal standards because no 13C- labelled PCN- compounds were available. Both, technical PCN-mixtures and PCN formed on fly ash show a characteristic pattern of Cl(x)N-congeners according to their difference in formation. Cl2N - Cl3N were formed most and Cl1N - Cl3N were also found in the gas phase in high amounts. A single isomer 1,2,3,5,6,7-Cl6N, known as a strongly bioaccumulating and toxic PCN, is formed in higher amounts together with 1,2,3,4,6,7-Cl6N.