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Oxides and peroxides

Calcium peroxide

Also known as Calcium dioxide, Calper, Calper G

CAS 1305-79-9Formula CaO2Molar mass 72.08 g/molEC 215-139-4
GHS signal word: Danger. Pictograms: Oxidiser, Harmful or irritant 24 suppliers listed
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Calcium peroxide chemical structure, CaO2, CAS 1305-79-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White or yellowish powder
Melting point
200 °C
Density
2.9 g/cm³
Solubility
Slightly soluble in water
HS code
282590
Category
Oxides and peroxides
UN number
UN 1457
Illustrative photo, a white jumbo bulk bag of powder in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Calcium peroxide?

Plain description, key identifiers and synonyms

Calcium peroxide is a member of calcium oxides.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
calcium peroxide
CAS number
1305-79-9 CAS number cross-checkedOther or deprecated CAS: 78403-22-2
EC numbers
215-139-4, 684-873-9
Molecular formula
CaO2
UNII
7FRO2ENO91
MDL number
MFCD00015988
INCI name
CALCIUM PEROXIDE
InChIKey
LHJQIRIGXXHNLA-UHFFFAOYSA-N
InChI
InChI=1S/Ca.O2/c;1-2/q+2;-2
SMILES (canonical and isomeric)
[O-][O-].[Ca+2]

Synonyms

  • Calcium dioxide
  • Calper
  • Calper G
  • Calcium peroxide (Ca(O2))
  • calcium, peroxide
  • peroxidocalcium
  • Calciumperoxid
  • Kalziumperoxid
  • cyc-CaO2
  • Ca(O2)
  • (eta~2~-Dioxidanediido)calcium
  • Calcium peroxide [UN1457] [Oxidizer]

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White or yellowish powderexp.
Odour
Odorlessexp.
Taste
Almost tastelessexp.
Melting point
200 °Cexp.
Density
2.9 g/cm³exp.
Solubility
Slightly soluble in waterexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
72.08 g/molcalc.
Exact mass
71.9524 Dacalc.
LogP (octanol/water)
-2.76calc.
Topological polar surface area
46.12 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS03: Oxidiser
Oxidiser
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H272May intensify fire, oxidiser.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (19)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P220Keep away from clothing and other combustible materials.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1457
Transport hazard class
5.1
Packing group
II

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Calcium peroxide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 24 suppliers
24 of 24 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

24 suppliers in 5 countries

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Calcium peroxide price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Stabilizer for rubber.

Seed disinfectant, dentifrices, dough conditioners, antiseptic, bleaching of oils, modification of starches, high temperature oxidation.

Calcium peroxide is used as oxygen source in the leaching of gold and silver ores with cyanide to improve precious metal recovery and leaching kinetics. A relatively new application for CaO2 is as a peroxide source in toothpaste and dental chewing gum products. Calcium peroxide is also used in limited quantities as a hardening accelerator for sulfide rubber, as dough conditioner in the baking industry, and as a nontoxic disinfectant for seed and grain.

An important application of calcium peroxide is for curing the polysulfide sealants used in double glazing window units. Calcium peroxide is also used at several gold mines in Australia to increase recovery of gold and reduce the consumption of cyanide.

Read more

Calcium peroxide (PermeOx) is also used to improve the bioremediation of soils contaminated with creosote or kerosene, to deodorize sewage sludges and wastewater, and to dechlorinate wastewater and effluents. A special formulation of calcium peroxide ... is used for removing metal ions from acidic waste streams such as coal ash leachate and acid mine drainage.

Industrial uses: Oxidizing agent.

Consumer uses: Oxidizing agent.

Use classes: Cosmetics.

Cosmetic ingredient, INCI name CALCIUM PEROXIDE(oxidising)

Functional uses

  • Chelating agent
  • Filler
  • Food preservative
  • Oxidizing agent

Cosmetic functions

  • Oxidising

How it is made

Preparation: Young, United States of America patent 2533660 (1950 to DuPont).

Interaction of solution of a calcium salt and sodium peroxide with subsequent crystallization.

Calcium peroxide (is) ... produced by precipitation of the octahydrate from an aqueous solution of a salt or hydroxide, followed by dehydration at temperatures above 100 °C.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Calcium peroxide is traded under.

HS 2825.90Indicative HS code

Inorganic bases not elsewhere classified in heading 2825

World exports in 2024
$972M
+5.4% vs 2023, imports $3.4B
2019 to 2024
Top exporters
  1. China28.5%
  2. United States23.7%
  3. Brazil10.8%
Top importers
  1. South Korea77.2%
  2. Japan4.3%
  3. United States3.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Calcium peroxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Calcium peroxide, based on the data on this page

What is Calcium peroxide?

Calcium peroxide is a member of calcium oxides.

What is the CAS number of Calcium peroxide?

The CAS registry number of Calcium peroxide is 1305-79-9. Other or deprecated CAS numbers: 78403-22-2.

What is the molecular formula and weight of Calcium peroxide?

The molecular formula of Calcium peroxide is CaO2 and its molar mass is 72.08 g/mol.

What is Calcium peroxide used for?

Stabilizer for rubber. Seed disinfectant, dentifrices, dough conditioners, antiseptic, bleaching of oils, modification of starches, high temperature oxidation. Calcium peroxide is used as oxygen source in the leaching of gold and silver ores with cyanide to improve precious metal recovery and leaching kinetics.

Is Calcium peroxide hazardous?

Calcium peroxide carries the GHS signal word "Danger". Main hazards: may intensify fire, oxidiser, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Calcium peroxide?

Calcium peroxide is usually classified under HS code 282590 (Hydrazine and hydroxylamine and their inorganic salts, other inorganic bases, other…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Calcium peroxide?

CompoundList lists 24 suppliers of Calcium peroxide in India, China, United States, Germany and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Calcium peroxide in India?

10 suppliers in India list Calcium peroxide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Calcium peroxide?

Suppliers quote Calcium peroxide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Calcium peroxide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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