1,2,3,4-Tetrahydronaphthalene

  • Tetralin
  • Tetrahydronapthalene
  • Napthalene-1,2,3,4-Tetrahydride
  • Tetralina
  • Tetranap
Formula
C10H12
Structure
Description
Clear, colorless liquid with a moldy turpentine odor.
Uses
Solvent for camphor, sulfur & iodine, in paintermediate thinners, as paintermediate remover when mixed with decalin or white spirit, as insecticide for clothes moth, as substitute for turpentine & petrol in germany.

Registry Numbers and Inventories.
CAS
119-64-2
EC (EINECS/ELINCS)
204-340-2
EC Index Number
601-045-00-4
EC Class
May form explosive peroxides; Irritant; Dangerous for the Environment
R 19 36/38 51/53
S 26 28 61
RTECS
QK3850000
RTECS class
Tumorigen; Primary Irritant
UN (DOT)
1325
Merck
12,9360
Beilstein/Gmelin
1446407
Beilstein Reference
4-05-00-01388
EPA OPP
55901
Swiss Giftliste 1
G-2923
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C10H12
Formula mass
132.21
Melting point, °C
-35.8
Boiling point, °C
207
Vapor pressure, mmHg
0.37 (25 C)
Vapor density (air=1)
4.55
Saturation Concentration
1.3 g/m3 (20 C)
Evaporization number
190 (diethyl ether = 1)
Critical temperature
434
Critical pressure
35.2
Density
0.974 g/cm3 (15 C)
Solubility in water
Insoluble
Viscosity
2.012 cp (25 C)
Surface tension
35.5 g/s2 (20 C)
Refractive index
1.54135 (20 C)
Dipole moment
0.6 D
Dielectric constant
2.6 (20 C)
Partition coefficient, pKow
3.90
Heat of fusion
12.5 kJ/mol
Heat of vaporization
41.3 kJ/mol
Heat of combustion
-5665 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store in direct sunlight. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Regularly check inhibitor levels to maintain peroxide levels below 1%. Do not break the seal on the container until it is needed. Label the container with the date it was first opened. Long-term storage is not recommended.
B3 D2B
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Avoid contact with skin and eyes. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. If peroxide formation is suspected, do not open or move container. Avoid contact with air and sunlight. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Unused chemicals should not be returned to the container. Do not distill since this removes peroxide-inhibitors.
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 gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
A half-face respirator with an organic vapor cartridge and particulate filter (NIOSH type P95 or R95 filter) may be worn for up to ten times the exposure limit or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. A full-face piece respirator with an organic vapor cartridge and particulate filter (NIOSH P100 or R100 filter) may be worn up to 50 times the exposure limit, or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. Please note that N series filters are not recommended for this material. For emergencies or instances where the exposure levels are not known, use a full-face piece positive-pressure, air-supplied respirator.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Isolate area and deny entry. Place under an inert atmosphere.
Disposal code
1
Stability
Stable under normal temperatures and pressures. On long term storage, substances with similar functional groups form explosive peroxides. Explosive peroxides may form on concentration. Tends to form explosive peroxides; especially when anhydrous. Peroxide formation may occur in containers that have been opened and remain in storage.
Incompatibilities
Oxidizing agents, may form peroxides in air.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
71
Autoignition, °C
385
Upper exp. limit, %
5.0
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. Use water spray to keep fire-exposed containers cool. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective.
Fire potential
Combustible liquid and vapor.
Hazards
May form explosive peroxides.
Combustion products
Fire may produce irritating and/or toxic gases.
Health
1
 
Flammability
2
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
May cause cataract and kidney and liver damage. Chronic naphthalene exposure has led to cataract formation and may cause skin allergy.
   Ingestion
May cause nausea, headache, vomiting and intragastric discomfort. Major hazard (from the decahydronaphthalene component) is aspiration into lungs, which may result in pulmonary edema or chemical pneumonia.
   Inhalation
Inhalation of vapor or mist is irritating to the respiratory tract. May produce headache, nausea, vomiting. High concentrations can produce central nervous system depression. The predominant reaction of overexposure from the naphthalene component is delayed intravascular hemolysis with symptoms of anemia, fever, jaundice and kidney or liver damage.
   Skin
Causes skin irritation with discomfort, rash. Sensitized individuals (from naphthalene exposure) may suffer a severe dermatitis.
   Eyes
Vapor causes irritation, redness and pain. The naphthalene component, at very high concentrations, can damage the nerves of the eye.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Possible aspiration hazard. Get medical aid if irritation or symptoms occur.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid if irritation develops or persists. Wash clothing before reuse. Flush skin with plenty of soap and water.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
1325
Response guide
Hazard class
4.1
Packing Group
II; III
 
USCG CHRIS Code
THN
 
32 Aromatic hydrocarbons
HS Code
2902 90 80
 
Std. Transport #
4912256
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P