SAFETY OPERATING PROCEDURE TEMPLATE
By signing and dating here the Principal Investigator/ or a designee certifies that the Safety Operating
Procedure (SOP) for Lithium Aluminum Hydride is accurate and effectively provides guidance for
employees and students in this lab.
_________________________________________________________________________
Printed Name
Signature
Date
I affirm that I have read and understand the Safety Operating Procedure for Lithium Aluminum Hydride
and have undergone the EH&S Laboratory & Research training and any lab specific training regarding
this SOP.
Printed Name
Signature
Date
Safe Working Procedure for Lithium Aluminum Hydride
Lithium Aluminum hydride (LiAlH4, LAH, lithal) is a widely used reducing agent.
It is usually supplied in the form of a fine grew powder. Lithium aluminum hydride
reacts vigorously with water, acids, and alcohols and can easily catch fire.
Precautions
Only personnel who have received training are permitted to work with LiAlH4.
Locate the nearest fire extinguisher before beginning work. Containers of lithium
aluminum hydride should only be opened inside a working fume hood or
preferably a glove box.
Lithium aluminum hydride should never be allowed to come into contact with water
except under carefully controlled conditions, otherwise there will be a fire. Reaction
mixtures containing LiAlH4 may be quenched by slow dropwise addition of water,
preferably under a stream of nitrogen gas.
Reactions involving LiAlH4 should be carried out under an inert atmosphere, such
as nitrogen gas. The solvents should be purged with nitrogen gas, and LiAlH4 should
be added portion-wise, with appropriate cooling. Detailed procedures are as follows:
1. The round bottom flask containing anhydrous solvent is purged with nitrogen gas.
2. Take LiAlH4 bottle from dry box. Use a horn spoon to weigh the desired amount
into a N2-purged glass vial. Metal spatulas or metal tools should never come into
contact with Lithium Aluminum Hydride.
3. Add LiAlH4 from the vial portion-wise to the reaction flask.
4. Put a reflux condenser on the flask.
Small quantities of lithium aluminum hydride should be destroyed by quenching
with cold iso-propanol. Do not add any LiAlH4 to tissue paper.
Personal protective equipment including safety Glasses, labcoat, Latex gloves, Long
pants, Covered shoes, should be used. Flame-resistant lab coats for additional
protection are suggested. Gloves must be clean and dry before handling lithium
aluminum hydride.