Tri-n-butylaluminum

  • Tributylaluminum
Formula
C12H27Al
Structure
Description
A colorless to light-yellow colored liquid.
Uses
Production of organo-tin compound.

Registry Numbers and Inventories.
CAS
1116-70-7
EC (EINECS/ELINCS)
214-240-0
UN (DOT)
3051
Beilstein/Gmelin
3660521
Beilstein Reference
4-04-00-04400
Swiss Giftliste 1
G-8602
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C12H27Al
Formula mass
198.33
Melting point, °C
-26.7
Boiling point, °C
98 (0.8 torr)
Density
0.823 g/cm3 (20 C)
Viscosity
1.9 cp at 25C
Heat of vaporization
45.6 kJ/mol
Heat of combustion
-3880 kJ/mol

Hazards and Protection.
Storage
Aluminum alkyls. In undiluted condition. Must be kept under inert gas like nitrogen or argon, and all possibility of contact with water must be avoided. Solution containing not more than 20% of these compd in non-reactive solvents, however, can be handled without risk of spontaneous ignition. Aluminum alkyls must be stored in an inert atmosphere;. Sensitive to oxidation and hydrolysis in air. Trialkylaluminums in general, toxic materials or that can decompose into toxic components should be stored in cool ventilated place, out of sun, away from fire hazard. Substance must be periodically inspected and monitored. Incompatible materials should be isolated.
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
Protective clothing and high standard of training in necessary precautionary measures are essential for handling of materials.
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. Do not use water. Attempt to stop leak if without undue personnel hazard. Cover all suspected material with dry sand or earth to prevent ignition until material can be permanently disposed of.
Stability
Less sensitive to oxidation in air than trialkylaluminums aluminum alkyls.
Incompatibilities
May react rapidly and dangerously with oxygen and other oxidizing agents, even weak ones Incompatible with acids, alcohols, amines, and aldehydes.

Fire.
Fire fighting
Do not use water. Use dry chemical, graphite, or dry earth. When fire is out, cover all suspected material with dry sand or earth to prevent re-ignition until material can be permanently disposed of. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
Flammable/combustible material.
Hazards
May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. May react vigorously or explosively on contact with water. May decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
4
 
 
Reactivity
3
 
 
Special
W

Health.
Exposure limit(s)
OSHA: PEL (8 h TWA): 15 mg/m3.
Poison_Class
1
Exposure effects
Headache, myalgias, weakness, and paresthesias in both feet have been reported.
   Ingestion
Burns of the esophagus and less commonly the stomach may occur after caustic ingestion; the absence of oral mucosal injury does not reliably exclude esophageal burns. Patients with stridor, drooling or vomiting are more likely to have esophageal burns.
   Inhalation
Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.
   Skin
Severe skin irritation and/or burns may occur.
   Eyes
See Skin.

First aid
 
   Ingestion
Mucosal if no respiratory compromise is present, dilute immediately with milk or water; no more than 8 ounces in adults and 4 ounces in children. Gastric ipecac contraindicated. Consider insertion of a small, flexible nasogastric or orogastric tube to suction gastric contents after recent large ingestions; the risk of further mucosal injury must be weighed against potential benefits.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothes. Irrigate exposed skin with copious amounts of water for at least 15 minutes or longer, depending on concentration, amount and duration of exposure to the chemical. A physician may need to examine the area if irritation or pain persist.
   Eyes
Home irrigation - exposed eyes should be irrigated with copious amounts of water for at least 30 minutes. An examination should always be performed. Ophthalmologic consultation should be obtained. Medical facility: irrigate with sterile 0.9% Saline for at least an hour or until the cul-de-sacs are free of particulate matter and returned to neutrality (confirm with pH paper).

Transport.
UN number
3051
Response guide
Hazard class
4.2
Packing Group
I
 
Std. Transport #
4916126