Molecular Structure of 2-Chloronaphthalene (CAS NO.91-58-7):

Molecular Formula: C₁₀H₇Cl
Molecular Weight: 162.6156
IUPAC Name: 2-Chloronaphthalene
Synonyms: 2-Chlornaftalen ; 2-Chlornaftalen [Czech] ; AI3-01537 ; CCRIS 5995 ; EINECS 202-079-9 ; HSDB 4014 ; Halowax ; Naphthalene, 2-chloro- ; RCRA waste number U047 ; beta-Chloronaphthalene
CAS NO: 91-58-7
EINECS: 202-079-9
Melting point: 57-60 °C
Index of Refraction: 1.642
Molar Refractivity: 48.99 cm³
Molar Volume: 135.5 cm³
Surface Tension: 42.9 dyne/cm
Density: 1.2 g/cm³
Flash Point: 115.2 °C
Enthalpy of Vaporization: 47.36 kJ/mol
Boiling Point: 256 °C at 760 mmHg
Vapour Pressure: 0.0253 mmHg at 25°C
Product Categories: Naphthalene derivatives; CHAnalytical Standards; Alpha Sort; C; CAlphabetic; Chemical Class; Naphthalenes; Volatiles/ Semivolatiles
SMILES: Clc2ccc1c(cccc1)c2
InChI: InChI=1/C10H7Cl/c11-10-6-5-8-3-1-2-4-9(8)7-10/h1-7H
InChIKey: CGYGETOMCSJHJU-UHFFFAOYAH
Std. InChI: InChI=1S/C10H7Cl/c11-10-6-5-8-3-1-2-4-9(8)7-10/h1-7H
Std. InChIKey: CGYGETOMCSJHJU-UHFFFAOYSA-N

 2-Chloronaphthalene (CAS NO.91-58-7) is used for chemical resistant gage fluids and instrument seals,and used as heat exchange fluids, high boiling specialty solvents, color dispersions,as ingredients in motor tune-up compounds.

Reported in EPA TSCA Inventory.

Hazard Codes of 2-Chloronaphthalene (CAS NO.91-58-7): Xi,T,F
Risk Statements: 36/37/38-39/23/24/25-23/24/25-11 
R36/37/38: Irritating to eyes, respiratory system and skin. 
R39: Danger of very serious irreversible effects. 
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed. 
R11: Highly flammable.
Safety Statements: 37/39-26-45-36/37-16-7 
S37/39: Wear suitable gloves and eye/face protection. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37: Wear suitable protective clothing and gloves. 
S16: Keep away from sources of ignition. 
S7: Keep container tightly closed.
RIDADR: UN1230 3/PG 2
RTECS: QJ2275000

Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of Cl⁻. See also CHLORINATED HYDROCARBONS, AROMATIC.

  2-Chloronaphthalene with cas registry number of 91-58-7 is a kind of organic chloride. It can be metabolized by pseudomonads by the accumulation of Chloro-2-hydroxy-6-oxohexadienoate, and 4-Chlorosalicylatewhich and 5-Chlorosalicylate which do not support growth.

 Dechlorination about 2-Chloronaphthalene is studied by Masamichi Akimoto, Hideharu Tanaka, and Akiko Watanabe. When 2-Chloronaphthalene reacts with 1-Chlorohexadecane in water under subcritical temperatures, hydrolysis reactions occurred catalyzed by H+ ions, whereas under supercritical conditions hydrodechlorinations occurred too, in which hydrogens evolved by the reaction of HCI with the metal wall of the reactor participated. The hydrogenation and hydrogenolysis of the primary reaction products also occurred for 1-chlorohexadecane under supercritical conditions. The dechlorination selectivity was nearly 100% for these organic chlorides irrespective of the reaction conditions employed.

1. Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
2. Handling: Avoid ingestion and inhalation. Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed.
3. Personal Protection: Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.