Tetraethyllead

  • Lead tetraethyl
  • TEL
  • Tetraethyl plumbane
Formula
Pb(C2H5)4
Structure
Description
A colorless liquid with a characteristic odor.
Uses
Antiknock agent in leaded gas (has been largely replaced by methyl-tert-butyl ether).

Registry Numbers and Inventories.
CAS
78-00-2
EC (EINECS/ELINCS)
201-075-4
RTECS
TP4550000
RTECS class
Tumorigen; Organometallic; Mutagen; Reproductive Effector; Human Data
UN (DOT)
1649
Merck
12,9343
Beilstein/Gmelin
3903146
Beilstein Reference
4-04-00-04349
RCRA
P110
Swiss Giftliste 1
G-1275
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C8H20Pb
Formula mass
323.45
Melting point, °C
-130.21
Boiling point, °C
200
Vapor pressure, mmHg
0.24 (25 C)
Vapor density (air=1)
8.6
Density
1.62 g/cm3
Solubility in water
0.2 mg/L
Viscosity
0.86 cp (20 C)
Surface tension
28.48 g/s2 (20 C)
Refractive index
1.50934
Partition coefficient, pKow
4.15
Heat of fusion
8.8 kJ/mol
Heat of vaporization
65.6 kJ/mol
Heat of combustion
-5855 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents.
Stability
Reactive under confinement, extreme caution.
Incompatibilities
Reacts with fats;

Fire.
Flash Point,°C
93.3
Autoignition, °C
110
Lower exp. limit, %
1.8
Fire fighting
Fire fighting should be done from an explosive-resistant location. Use water from unmanned monitors and hose-holders to keep fire-exposed containers cool. When stopping leak, use water spray to protect firefighters. Runoff from fire control or dilution water may cause pollution.Water spray may be used because the material can be cooled below its flash point.
Fire potential
Moderately flammable.
Hazards
May explode in fires. Decomposes slowly at room temperature and more rapidly at elevated temperatures.
Combustion products
Combustion products are carbon dioxide, water, and lead.
Health
3
 
Flammability
2
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
OSHA PEL: TWA 0.075 mg/m3 skin NIOSH REL: TWA 0.075 mg/m3 skin NIOSH IDLH: 40 mg/m3 (as Pb)
Poison_Class
1
Exposure effects
Reduced body temperature, fever, low heart rate, abnormally low blood pressure and irregular breathing have been reported following acute exposure. Clinical neurologic effects of tel intoxication can be divided into mild, moderate, and severe. They usually occur within 1 to 5 days, or as long as 14 days post exposure. Mild - anxiety, irritability, insomnia, lurid dreams, lassitude, metallic taste, and cerebellar ataxia. Moderate - disorientation, hyperexcitability, hyperreflexia, lurid dreams, tremors, and chorea. Severe - delusions, hallucinations, mania, seizures, cerebral edema, coma, and death. In contrast to inorganic lead, which is a known human reproductive hazard and also has many reproductive effects in animals, the effect of TEL on human and animal reproduction, if any, is much less clear.
   Ingestion
Tel intoxication usually lacks the common gi manifestations of inorganic lead intoxication. Anorexia, nausea, vomiting, diarrhea and weight loss have been seen after acute exposure.
   Inhalation
Inhalation of tel vapors can be fatal. Upper respiratory tract irritation and sneezing may follow dust exposure. Irregular respirations are a non-specific finding.
   Skin
Skin absorption of tel can occur. Pallor may be observed following acute exposure.
   Eyes
See inhalation.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1649
Response guide
Hazard class
6.1
Packing Group
I
 
USCG CHRIS Code
TEL
 
Std. Transport #
4921484
 
IMO Chemical Code
17