Lactose

Lanolin

Latex

Lead

Lead acetate

Lead carbonate

Lead chloride

Lead dioxide

Lead nitrate

Lead oxide

Lead sulfate

Lead sulfide

Lemon juice

Light sticks

Lime, slaked

Lime water 

Linseed Oil

Lithium

Lithium carbonate

Lithium chloride

Lithium hydroxide

Lithium nitrate

Lithium sulfate

Litmus paper

Luminol

Lycopodium powder