p-tert-Butyltoluene

  • 1-Methyl-4-tert-butylbenzene
  • 4-tert-Butyltoluene
Formula
4-(CH3)C6H4C(CH3)3
Structure
Description
Colorless liquid, aromatic gasoline-like odor.
Uses
As a solvent for resins, as a primary intermediate in chemical industry.

Registry Numbers and Inventories.
CAS
98-51-1
EC (EINECS/ELINCS)
202-675-9
EC Class
flammable, toxic, irritant
R 10 22 23 36/37
S 26 37 45
RTECS
XS8400000
RTECS class
Human Data; Primary Irritant
UN (DOT)
2667
Beilstein/Gmelin
2038670
Beilstein Reference
4-05-00-01097
Swiss Giftliste 1
G-1339
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C11H16
Formula mass
148.25
Melting point, °C
-62.5
Boiling point, °C
192.8
Vapor pressure, mmHg
0.7
Vapor density (air=1)
4.62
Saturation Concentration
920 ppm (0.09%) at 25 C (calculated)
Odor Threshold Odor threshold 1 mg/m3
Critical temperature
401
Critical pressure
26.3
Density
0.861 g/cm3
Solubility in water
Insoluble
Viscosity
1.25 MPA
Refractive index
1.4912 (13.2 C)
Partition coefficient, pKow
4.23
Heat of vaporization
52.31 kJ/mol
Heat of combustion
-6496 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Use only in a chemical fume hood. 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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
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. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
48
Autoignition, °C
510
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. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Fire potential
This chemical is combustible.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
4
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: TWA 10 ppm (60 mg/m3) ST 20 ppm (120 mg/m3) OSHA PEL: TWA 10 ppm (60 mg/m3) IDLH 100 ppm
Poison_Class
4
Exposure effects
May cause liver and kidney damage.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed. May cause central nervous system effects and/or neurological effects.
   Inhalation
Causes respiratory tract irritation. Vapors may cause dizziness or suffocation. Inhalation of high concentrations may cause pulmonary edema. May produce cardiovascular effects.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2667
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
BUE
 
32 Aromatic hydrocarbons
HS Code
2902 90 80
 
IMO Chemical Code
#
IMO Pollution Category
A@
IMO Hazard code
P