Calcium hypochlorite

Calcium hypochlorite is an inorganic compound with formula Ca(ClO)2. It is a white solid, although commercial samples appear yellow. It strongly smells of chlorine, owing to its slow decomposition in moist air. This compound is relatively stable as a solid and solution and has greater available chlorine than sodium hypochlorite. "Pure" samples have 99.2% active chlorine. Given common industrial purity, an active chlorine content of 65-70% is typical. It is the main active ingredient of commercial products called bleaching powder, used for water treatment and as a bleaching agent.

Calcium hypochlorite
Names
Other names
Hypochlorous acid calcium salt, bleaching powder, chloride of lime
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.029.007
EC Number
  • 231-908-7
KEGG
RTECS number
  • NH3485000
UNII
UN number 1748 2208
  • InChI=1S/Ca.2ClO/c;2*1-2/q+2;2*-1 Y
    Key: ZKQDCIXGCQPQNV-UHFFFAOYSA-N Y
  • InChI=1S/Cacl.ClO/c;1-2/q+2;2*-1
    Key: ZKQDCIXGCQPQNV-UHFFFAOYAV
  • Cl[O-].[Ca+2].Cl[O-]
Properties
Ca(ClO)2
Molar mass 142.98 g/mol
Appearance white/gray powder
Density 2.35 g/cm3 (20 °C)
Melting point 100 °C (212 °F; 373 K)
Boiling point 175 °C (347 °F; 448 K) decomposes
21 g/100 mL at 25 °C
Solubility reacts in alcohol
Hazards
GHS labelling:
Danger
H272, H302, H314, H400
P210, P220, P221, P260, P264, P270, P273, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P370+P378, P391, P405, P501
NFPA 704 (fire diamond)
3
0
1
OX
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
850 mg/kg (oral, rat)
Safety data sheet (SDS) ICSC 0638
Related compounds
Other anions
 Calcium chloride
Other cations
 Sodium hypochlorite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
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