calcium hypochlorite,dry*
bleaching powder
chlorinated lime
dry pool chlorine
|
11-12
1
2
3
-
5
-
PS
|
5.1
DHS
CW
Hazardous Chemical
|
III
|
1748
7778-54-3
|
Toxic by all routes of exposure.
Evolves toxic chlorine gas on contact with acids; corrosive to skin and eyes; can explode if pressure of chlorine builds up in a sealed container.
Use in a fume cupboard if practicable; otherwise use small quantities in a well-ventilated area.
Use eye and skin protection. Do not mix with solutions containing ammonia, since dangerously explosive nitrogen trichloride may form. Can react violently with fine particles of metals or rust. It is a safer source of chlorine than sodium hypochlorite solution, since it can not splash and is not as strongly alkaline.
Schools with swimming pools should note, where the amount of dry calcium hypochlorite exceeds 40 kg a Dangerous Goods Licence is required. Large amounts must be stored in a secure, well-ventilated space, well separated from any acid to prevent accidental contact or mixing. The result of which is highly toxic chlorine gas.
Q-Stores
16
See also OXIDANTS.
and Appendix F.
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