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Sigma-Aldrich

Calcium oxide

reagent grade

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Synonym(s):
Lime, Quicklime
Linear Formula:
CaO
CAS Number:
Molecular Weight:
56.08
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

reagent grade

Quality Level

form

powder

concentration

≥68.0% Ca (EDTA titration)

loss

10% loss on ignition, 1000°C (absorbed H2O and CO2)

pH

12.6 (20 °C)

bp

2850 °C (lit.)

density

3.3 g/mL at 25 °C (lit.)

SMILES string

O=[Ca]

InChI

1S/Ca.O

InChI key

ODINCKMPIJJUCX-UHFFFAOYSA-N

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General description

Calcium oxide (CaO) is an alkaline earth metal oxide that has many industrial applications. Calcium oxide receives great attention in catalysis because it is affordable, environmentally friendly, and characterized by a strong basic nature, abundantly available, low methanol solubility and non-toxic compound.

Application

Calcium oxide is used:
  • As a catalyst during the transesterification of palm oil to produce biodiesel.
  • In the inactivation of Cryptosporidium spp. oocysts and Giardia spp. Cysts from WTS (water treatment sludge).
  • In combination with PAA (peracetic acid) to increases the biogas production potential of cow manure and maize straw.

pictograms

CorrosionExclamation mark

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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