Diethylbenzene

  • Diethylbenzene, mixture of o-, m- and p-isomers
  • Diethylbenzol
Formula
C6H4(C2H5)2
Structure
Description
Clear, colorless to light yellow liquid with an aromatic odor.
Uses
This is a high volume chemical with production exceeding 1 million pounds annually in the U.S. Used as a solvent and the synthesis of other chemicals.

Registry Numbers and Inventories.
CAS
25340-17-4
EC (EINECS/ELINCS)
246-874-9
S 9 16 24/25 28A 33 37 45
RTECS
CZ5600000
RTECS class
Reproductive Effector; Primary Irritant
UN (DOT)
2049
Swiss Giftliste 1
G-2209
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H14
Formula mass
134.2
Melting point, °C
-35
Boiling point, °C
182
Vapor pressure, mmHg
0.1 (20 C)
Vapor density (air=1)
4.6
Critical temperature
399
Critical pressure
28.5
Density
0.87 g/cm3 (20 C)
Solubility in water
Insoluble
Surface tension
26.94 g/s2 (40 C)
Refractive index
1.495 (16.2 C)
Partition coefficient, pKow
3.84
Heat of vaporization
43.6 kJ/mol
Heat of combustion
-5553 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.
B3
Handling
Wash thoroughly after handling. Use with adequate ventilation. 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. Take precautionary measures against static discharges. Keep container tightly closed. Keep away from 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
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. Avoid runoff into storm sewers and ditches which lead to waterways. 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
55
Autoignition, °C
380
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. For small fires, extinguish using dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, extinguish using water spray, fog, or alcohol-resistant foam. Water may be ineffective. Do NOT use straight streams of water. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Flammable liquid and vapor.
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 hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 10 mg/m3
Exposure effects
May cause liver and kidney damage. Effects may be delayed.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver and kidney damage. The toxicological properties of this substance have not been fully investigated. Ingestion of large amounts may cause CNS depression.
   Inhalation
May cause liver and kidney damage. The toxicological properties of this substance have not been fully investigated. Aspiration may lead to pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation in the chest.
   Skin
Causes moderate skin irritation. May cause irritation and dermatitis. May cause cyanosis of the extremities.
   Eyes
Causes mild eye irritation. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Wash mouth out with water.
   Inhalation
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. Do NOT use mouth-to-mouth resuscitation.
   Skin
Get medical aid. Flush skin with plenty of 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.

Transport.
UN number
2049
Response guide
Hazard class
3
Packing Group
III
 
USCG CHRIS Code
DEB
 
32 Aromatic hydrocarbons
Std. Transport #
4912035
 
IMO Chemical Code
17
IMO Pollution Category
A
IMO Hazard code
P