1,2,3,5-Tetramethylbenzene

  • Isodurene
Formula
C10H14
Structure
Description
Clearless, colorless to pale yellow liquid.
Uses
Occurs in coal tar.

Registry Numbers and Inventories.
CAS
527-53-7
EC (EINECS/ELINCS)
208-417-1
RTECS
DC0475000
RTECS class
Primary Irritant
UN (DOT)
3295
Merck
12,5182
Beilstein/Gmelin
1904391
Beilstein Reference
4-05-00-01073
Canada DSL/NDSL
DSL
US TSCA
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H14
Formula mass
134.22
Melting point, °C
-23.7
Boiling point, °C
197.9
Vapor pressure, mmHg
0.49 (25 C)
Vapor density (air=1)
4.63
Density
0.891 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.5134 (20 C)
Partition coefficient, pKow
4.06
Heat of vaporization
43.8 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. 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. Use only in a well ventilated area. 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. 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. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
63
Autoignition, °C
427
Upper exp. limit, %
4.6
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. Combustible Liquid. Extinguishing media: Use water spray to cool fire-exposed containers. Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
This material is combustible.
Hazards
During a fire, irritating and highly toxic gasesmay be generated by thermal decomposition or combustion.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation.
   Eyes
May cause 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. Wash clothing before reuse.
   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
3295
Response guide
Hazard class
3
Packing Group
I; II; III
 
USCG CHRIS Code
TTB
 
32 Aromatic hydrocarbons
Std. Transport #
4914221
 
IMO Chemical Code
17
IMO Pollution Category
A
IMO Hazard code
P