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Water treatment and disinfection

Sodium hypochlorite vs calcium hypochlorite

Sodium hypochlorite (ClNaO, CAS 7681-52-9) and calcium hypochlorite (CaCl2O2, CAS 7778-54-3) are both listed under silicates, borates and other salts.

Sodium hypochlorite has a molar mass of 74.44 g/mol, calcium hypochlorite 142.98 g/mol.

Measured boiling points are 111 °C for sodium hypochlorite and 100 °C for calcium hypochlorite.

Both carry the GHS signal word Danger.

On CompoundList, 555 suppliers list sodium hypochlorite and 304 suppliers list calcium hypochlorite.

Data last updated 7 October 2026

Sodium hypochlorite and calcium hypochlorite compared side by side
Sodium hypochlorite chemical structure, ClNaO, CAS 7681-52-9
Sodium hypochlorite
Calcium hypochlorite chemical structure, CaCl2O2, CAS 7778-54-3
Calcium hypochlorite
Identity
Name in our databaseSodium hypochloriteCalcium hypochlorite
CAS number7681-52-97778-54-3
Molecular formulaClNaOCaCl2O2
Molar mass74.44 g/mol142.98 g/mol
IUPAC namesodium hypochloritecalcium dihypochlorite
EC number231-668-3231-908-7
Physical properties
AppearanceGreenish yellow liquidPowder
Melting point18 °C100 °C
Boiling point111 °C100 °C
DensityRelative density (water = 1): 1.1 (5.5% aqueous solution)2.350 g/cm³
Solubility29.3 g/100 g (0 °C) in water21% in water at 25 °C
LogP (octanol/water)Computed from the structure-3.5-1.38
Safety (GHS)
Signal wordDangerDanger
Pictograms
GHS05: Corrosive
GHS09: Hazardous to the environment
GHS03: Oxidiser
GHS05: Corrosive
GHS07: Harmful or irritant
GHS09: Hazardous to the environment
Hazard statements
  • H314 Causes severe skin burns and eye damage.
  • H318 Causes serious eye damage.
  • H400 Very toxic to aquatic life.
  • H410 Very toxic to aquatic life with long lasting effects.
  • H272 May intensify fire, oxidiser.
  • H302 Harmful if swallowed.
  • H314 Causes severe skin burns and eye damage.
  • H400 Very toxic to aquatic life.
UN numberUN 1791UN 3485
Uses and classification
Uses and functions
  • Bleaching agents
  • Disinfectants
  • Analgesic
  • Anti-inflammatory agent
  • Antiinfective agent
  • Antimicrobial agent
  • Preservatives
  • Bleaching agents
  • Disinfectants
  • Bleaching agent
  • Reagent
  • Antimicrobial
CategoryInorganic chemicals › Silicates, borates and other saltsInorganic chemicals › Silicates, borates and other salts
HS code282890Hypochlorites, commercial calcium hypochlorite, chlorites, hypobromites, other282810Commercial calcium hypochlorite and other calcium hypochlorites
Market on CompoundList
Suppliers555 suppliers304 suppliers
Supplier countries70 countries, most in India, United States, China52 countries, most in India, China, United States
Price rangeOnly prices set by suppliers who manage their own profilePrice on requestPrice on request

Measured and computed values as shown on each chemical page, plus live listings on CompoundList. Details may have changed, please confirm them with the supplier. Safety data is a summary, not an SDS.

Sodium hypochlorite
Calcium hypochlorite

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