calcium*
. . . metal
. . . granules
|
7-12
1
2
-
-
5
-
-
|
4.3
Not Hazardous
|
II
|
1401
7440-70-2
|
Toxic if ingested or by skin contact.
Evolves flammable hydrogen gas on contact with water; hydrogen and air will explode if ignited; surface layer of calcium hydroxide is corrosive to skin and eyes. Use in a fume cupboard if practicable, otherwise use small quantities in a well-ventilated area. Use eye and skin protection when splashes are possible. The metal is much harder to cut than sodium. Do not mix calcium with sulfur or phosphorus, since the reaction is dangerously exothermic.
Provide each student only a few grains of calcium. Purchase in small quantities and store in a tightly sealed container to exclude moisture and air. Used to compare the reactivities of metals, with water, air, dilute acids. Readily oxidised in container.
4
See also METALS, ACTIVE.
and REDUCTANTS.
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