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| CAS No.: | 1305-78-8 |
|---|---|
| Name: | Calcium oxide |
| Molecular Structure: | |
|
|
|
| Formula: | CaO |
| Molecular Weight: | 56.08 |
| Synonyms: | Calciumoxide (6CI,8CI);Bell CML 41;Bell CML(P);Burnt lime;CAC 20209A;CML 31;CML 35S;Calcia;Calciogreen;Caloxal CPA;Caloxol W 3;Calx;Calxyl;Desical P;F Raimu 1300D;F Raimu 900K;Fishcal;KSX;Moisutoppu10;NanoActive CaO Plus;Nanotek CaO;Power-Ca;QC-X;Rhenofit F;Rhenogran CaO 80;Rhenosorb F;Vesta 20;Vesta PP;Calciumoxide (CaO); |
| EINECS: | 215-138-9 |
| Density: | 3.3 g/mL at 25 °C(lit.) |
| Melting Point: | 2570 °C |
| Boiling Point: | 2850 °C |
| Flash Point: | 2850°C |
| Solubility: | reacts with water |
| Appearance: | white to grey solid |
| Hazard Symbols: |
 C, Xi
|
| Risk Codes: | 34-41 |
| Safety: | 26-36/37/39-45-25-39 |
| PSA: | 17.07000 |
| LogP: | -0.11880 |
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Standards and Recommendations
OSHA PEL: TWA 5 mg/m3
ACGIH TLV: TWA 2 mg/m3
DFG MAK: 5 mg/m3
DOT Classification: 8; Label: Corrosive
Analytical Methods
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Specification
Calcium oxide, its cas register number is 1305-78-8. It also can be called Airlock Bell CML(E); Bell CML(P); Burnt lime; CALX; CCRIS 7496; CML 21; CML 31; CML 35; Calcia; Calcia (CaO); Calcium monoxide; Calcium oxide;. Calcium oxide(CAS NO.1305-78-8) is commonly known as burnt lime, lime or quicklime, which is a widely used chemical compound. It is a white, caustic and alkaline crystalline solid at room temperature. As a commercial product, lime often also contains magnesium oxide, silicon oxide and smaller amounts of aluminium oxide and iron oxide. The name lime (native lime) refers to a very rare mineral of the CaO composition.
Preparatinon of Calcium oxide: Calcium oxide is usually made by the thermal decomposition of materials such as limestone, that contain calcium carbonate (CaCO3; mineral calcite) in a lime kiln. This is accomplished by heating the material to above 825 °C (1,517 °F), a process called calcination or lime-burning, to liberate a molecule of carbon dioxide (CO2); leaving quicklime.
Uses of Calcium oxide: Calcium oxide (CAS NO.1305-78-8) is used in water and sewage treatment to reduce acidity, to harden, as a flocculant and a coagulant, and in bleaching; in agriculture to improve acidic soils; and in pollution control, in gas scrubbers to desulfurize waste gases and to treat many liquid effluents. It is also used in the metallurgical industry as a flux in the manufacture of steel.
When you are using this chemical, please be cautious about it as the following:
1. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;
2. Wear suitable protective clothing, gloves and eye/face protection;
3. In case of accident or if you feel unwell, seek medical advice immediately (show label where possible);
4. Avoid contact with eyes;
5. Wear eye/face protection;
You can still convert the following datas into molecular structure:
(1)InChI=1S/Ca.O;
(2)InChIKey=ODINCKMPIJJUCX-UHFFFAOYSA-N;
(3)SmilesO=[Ca];