1-Methylnaphthalene

  • alpha-Methylnaftalen
  • alpha-Methylnaphthalene
Formula
C11H10
Structure
Description
Colorless liquid.
Uses
Organic synthesis.

Registry Numbers and Inventories.
CAS
90-12-0
EC (EINECS/ELINCS)
201-966-8
EC Class
harmful, dangerous for the environment
R 22 36/37/38 51/53
S 26 36/37/39 60 61
RTECS
QJ9630000
RTECS class
Mutagen
UN (DOT)
3082
Beilstein/Gmelin
506793
Beilstein Reference
4-05-00-01687
Swiss Giftliste 1
G-7838
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
-33 to -32
Boiling point, °C
240
Vapor pressure, mmHg
0.05 (25 C)
Vapor density (air=1)
4.91
Saturation Concentration
71 ppm at 25 C (calculated)
Odor Threshold Odor threshold 0.02 ppm.
Critical temperature
>495
Density
1.022 g/cm3 (20 C)
Solubility in water
30 mg/L
Viscosity
3.44 cp (20 C)
Surface tension
39.3 g/s2 (20 C)
Refractive index
1.6170 (20 C)
Partition coefficient, pKow
3.87
Heat of vaporization
46.0 kJ/mol
Heat of combustion
-5784 kJ/mol

Hazards and Protection.
Storage
Keep away from heat and flame. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Wash area with soap and water. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
82
Autoignition, °C
529
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. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Combustible Liquid. Containers may explode when heated. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.
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.
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. Causes digestive tract irritation.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   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. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.
   Eyes
Immediately 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
 
USCG CHRIS Code
MNA
 
32 Aromatic hydrocarbons
HS Code
2902 90 80
 
IMO Chemical Code
17
IMO Pollution Category
A
IMO Hazard code
S/P