Periodic Properties #635-MSDS
Most Hazardous Materials
Hydrochloric Acid, 4M (Strong Acid),
HCl
Calcium metal, (Water Reactive), Ca
Magnesium metal, (Flammable Solid),
Mg
Less Hazardous Materials
Aluminum metal, Al
Silicon, Si
Phenolphthalein indicator, Phenolphthalein