EU/US Properties Organoleptics Cosmetics Suppliers Safety Safety in use Safety references References Other Blenders Uses Occurrence Synonyms Articles Notes

calcium oxide
calcia (CaO)


Name: oxocalcium
CAS Number: 1305-78-8Picture of molecule3D/inchi
Other: 104624-96-6
ECHA EINECS - REACH Pre-Reg: 215-138-9
MDL: MFCD00010911
Molecular Weight: 56.07720000
Formula: Ca O
NMR Predictor: Predict (works with chrome or firefox)
Category: alkalis, dough conditioners, yeast food
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
Google Scholar: Search
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Perfumer and Flavorist: Search
Google Patents: Search
US Patents: Search
EU Patents: Search
Pubchem Patents: Search
PubMed: Search
NCBI: Search
 FDA/DG SANTE Petitions, Reviews, Notices:
184.1210 Calcium oxide View-review
EU SANCO Calcium oxide View-review
JECFA Food Additive: Calcium Oxide
GSFA Codex: Calcium oxide (529)
DG SANTE Food Additives: calcium oxide
DG SANTE Food Contact Materials: calcium oxide
FDA Regulation:

Subpart B--Listing of Specific Substances Affirmed as GRAS
Sec. 184.1210 Calcium oxide.
Physical Properties:
Appearance: white to grayish granules (est)
Assay: 95.00 to 100.00
Food Chemicals Codex Listed: No
Flash Point: 32.00 °F. TCC ( 0.00 °C. ) (est)
Storage: store under nitrogen.
 moisture Sensitive.
Soluble in:
 water, slightly
 water, 4.209e+005 mg/L @ 25 °C (est)
Insoluble in:
Organoleptic Properties:
Odor Description:
at 100.00 %.
Odor and/or flavor descriptions from others (if found).
Cosmetic Information:
CosIng: cosmetic data
Cosmetic Uses: buffering agents
American Elements
Calcium Oxide 99%
Odor: characteristic
Use: Calcium Oxide is a highly insoluble thermally stable Calcium source suitable for glass, optic and ceramic applications. Oxide compounds are not conductive to electricity. However, certain perovskite structured oxides are electronically conductive finding application in the cathode of solid oxide fuel cells and oxygen generation systems. Calcium Oxide is generally immediately available iHigh Purity (99.999%) Calcium Oxide (CaO) Powdern mostvolumes. Calcium Oxide is also available in pellets, pieces, powder, sputtering targets, tablets, and nanopowder (from American Elements' nanoscale production facilities). Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Nanoscale (See also Nanotechnology Information and Quantum Dots) elemental powders and suspensions, as alternative high surface area forms, may be considered. Additional technical, research and safety information is available.
Barium & Chemicals
Calcium Oxide High-purity Grade
Odor: characteristic
Use: Refractory, flux in steel manufacture, pulp and paper, manufacture of calcium carbide, sulfur dioxide removal from stack gases, sewage treatment, neutralization of acid waste effluent, Dehairing of hides, glass manufacture and as a carbon dioxide absorbent.
EMD Millipore
For experimental / research use only.
Calcium oxide from marble
Odor: characteristic
Use: Calcium Oxide HP is used as a dessicant in both plastics and elastomer applications. Calcium Oxide HP is of high purity. Calcium Oxide HP can be used as a inorganic coloring agent in paints, a process regulator in rubber compound manufacture and as an opacifier in plastics.
Kraft Chemical
Calcium Oxide
Penta International
Sigma-Aldrich: Aldrich
For experimental / research use only.
Calcium Oxide 99.995% trace metals basis
Safety Information:
Preferred SDS: View
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
Safety in Use Information:
Category: alkalis, dough conditioners, yeast food
Recommendation for calcium oxide usage levels up to:
 not for fragrance use.
Recommendation for calcium oxide flavor usage levels up to:
 not for flavor use.
Safety References:
EPI System: View
NIOSH International Chemical Safety Cards: search
NIOSH Pocket Guide: search
NLM Hazardous Substances Data Bank: Search
Chemical Carcinogenesis Research Information System: Search
AIDS Citations: Search
Cancer Citations: Search
Toxicology Citations: Search
Env. Mutagen Info. Center: Search
NLM Developmental and Reproductive Toxicity: Search
EPA Substance Registry Services (TSCA): 1305-78-8
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 14778
National Institute of Allergy and Infectious Diseases: Data
WGK Germany: 1
Chemidplus: 0001305788
EPA/NOAA CAMEO: hazardous materials
RTECS: 1305-78-8
NIST Chemistry WebBook: Search Inchi
Canada Domestic Sub. List: 1305-78-8
Pubchem (cid): 14778
Pubchem (sid): 134979816
Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
FDA Everything Added to Food in the United States (EAFUS): View
KEGG (GenomeNet): D01679
HMDB (The Human Metabolome Database): Search
FooDB: FDB015401
Export Tariff Code: 2825.90.6000
Haz-Map: View
Household Products: Search
VCF-Online: VCF Volatile Compounds in Food
ChemSpider: View
Wikipedia: View
RSC Learn Chemistry: View
•properly stored lime of commerce contains 90-95% free calcium oxide. •grades: technical; refractory; agricultural; fcc
Potential Blenders and core components note
None Found
Potential Uses:
 buffering agents 
Occurrence (nature, food, other): note
 coconut leaf
Search Trop Picture
 cotton seed
Search Trop Picture
 gourd calabash gourd seed
Search Trop Picture
 hazelnut leaf
Search Trop Picture
 calcia (CaO)
 calcium monoxide
 calcium oxide FCC
 calcium oxide HP
 caloxal CPA
 caloxol W3
 desical P
burnt lime
 lime, burned
 quick lime
 rhenosorb C
 unslaked lime
 vesta PP


PubMed: Hydrogen sulfide is a novel gasotransmitter with pivotal role in regulating lateral root formation in plants.
PubMed: Biodiesel production from transesterification of palm oil with methanol over CaO supported on bimodal meso-macroporous silica catalyst.
PubMed: [Research on the quantitative determination of lime in wheat flour by near-infrared spectroscopy].
PubMed: The effect of calcinated calcium and chlorine treatments on Escherichia coli O157:H7 87-23 population reduction in radish sprouts.
PubMed: Antimicrobial characteristics of heated scallop shell powder and its application.
PubMed: Osteoporosis prevalence and associated factors in patients with COPD: a cross-sectional study.
PubMed: Improved sugar cane juice clarification by understanding calcium oxide-phosphate-sucrose systems.
PubMed: A 90-day intravenous administration toxicity study of CaO-SiO2-P2O5-B2O3 glass-ceramics (BGS-7) in rat.
PubMed: Feeding value of enset (Ensete ventricosum), Desmodium intortum hay and untreated or urea and calcium oxide treated wheat straw for sheep.
PubMed: The danger of lime use in agricultural anthrax disinfection procedures: the potential role of calcium in the preservation of anthrax spores.
PubMed: Nutrient digestion and performance by lambs and steers fed thermochemically treated crop residues.
PubMed: Chemical fractionation of phosphorus in stabilized biosolids.
PubMed: Bactericidal effects of CaO (scallop-shell powder) on foodborne pathogenic bacteria.
PubMed: Water-soluble and solid-state speciation of phosphorus in stabilized sewage sludge.
PubMed: Kinetic analysis of the bactericidal action of heated scallop-shell powder.
PubMed: Alkaline-fermented foods: a review with emphasis on pidan fermentation.
PubMed: Econazole inhibits thapsigargin-induced platelet calcium influx by mechanisms other than cytochrome P-450 inhibition.
PubMed: An industrial hygiene evaluation of beet sugar processing plants.
PubMed: Nickel--an essential element.
Used in food as a pH control agent, nutrient supplement, dough conditioner, and texturising, firming and anticaking agent
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