2-Methylnaphthalene

  • beta-Methylnaphthalene
Formula
C11H10
Structure
Description
White crystalline solid.
Uses
Organic synth, insecticides.

Registry Numbers and Inventories.
CAS
91-57-6
EC (EINECS/ELINCS)
202-078-3
EC Class
harmful, dangerous for the environment
R 22 36/37/38
S 26 36/37/39
RTECS
QJ9635000
RTECS class
Tumorigen; Mutagen
UN (DOT)
3082
Beilstein/Gmelin
906859
Beilstein Reference
4-05-00-01693
Swiss Giftliste 1
G-7839
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C11H10
Formula mass
142.20
Melting point, °C
32 - 35
Boiling point, °C
241
Vapor pressure, mmHg
0.03 (25 C)
Vapor density (air=1)
1
Odor Threshold Odor threshold 10 ppb
Critical temperature
488
Critical pressure
34.6
Density
1.0058 g/cm3 (20 C)
Solubility in water
30 mg/L
Viscosity
1.05 cp (40 C)
Surface tension
36.54 g/s2 (40 C)
Refractive index
1.6015 (40 C)
Partition coefficient, pKow
3.86
Heat of fusion
11.9 kJ/mol
Heat of vaporization
52.8 kJ/mol
Heat of combustion
-5794 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
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.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
98
Autoignition, °C
488
Upper exp. limit, %
5.3
Lower exp. limit, %
0.8
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
This chemical is combustible.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 20 mg/m3
Poison_Class
3
Exposure effects
Hemolytic anemia has developed in neonates following in utero exposure. In utero exposure causes cataracts in rats.
   Ingestion
May be harmful if swallowed.
   Inhalation
Inhalation of dust may cause respiratory tract irritation.
   Skin
Causes skin irritation. May cause photosensitization in certain individuals.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
3082
Response guide
Hazard class
9
Packing Group
III
 
32. Aromatic hydrocarbons
HS Code
2902 90 80