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1305-78-8 molecular structure
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calcium dihydroxide

ChemBase ID: 105620
Molecular Formular: CaO2
Molecular Mass: 72.0768
Monoisotopic Mass: 71.95242022
SMILES and InChIs

SMILES:
[OH-].[OH-].[Ca+2]
Canonical SMILES:
[OH-].[OH-].[Ca+2]
InChI:
InChI=1S/Ca.2H2O/h;2*1H2/q+2;;/p-2
InChIKey:
AXCZMVOFGPJBDE-UHFFFAOYSA-L

Cite this record

CBID:105620 http://www.chembase.cn/molecule-105620.html

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NAMES AND DATABASE IDS

NAMES AND DATABASE IDS

Names Database IDs
IUPAC name
calcium dihydroxide
calcium dioxidanide
IUPAC Traditional name
calcium dihydroxide
calcium(2+) bis(OH-)
calcium dioxidanide
Synonyms
Slaked lime
Milk of lime
Calcium(II) hydroxide
Pickling lime
Hydrated lime
Calcium hydroxide
Calcium hydroxide, ACS
Calcium hydroxide
CALCIUM HYDROXIDE ACS REAGENT GRADE
Lime
Quicklime
CALCIUM OXIDE
氢氧化钙, ACS
氢氧化钙
CAS Number
1305-78-8
1305-62-0
EC Number
215-138-9
215-137-3
MDL Number
MFCD00010901
Merck Index
141673
PubChem SID
162092817
PubChem CID
6093208
14777
CHEBI ID
31341
Chemspider ID
14094
KEGG ID
D01083
Unique Ingredient Identifier
PF5DZW74VN
Wikipedia Title
Calcium_hydroxide

CALCULATED PROPERTIES

CALCULATED PROPERTIES

JChem
Acid pKa 15.7  H Acceptors
H Donor LogD (pH = 5.5) -0.652 
LogD (pH = 7.4) -0.652  Log P -0.652 
Molar Refractivity 13.9149 cm3 Polarizability 1.1434737 Å3
Polar Surface Area 0.0 Å2 Rotatable Bonds
Lipinski's Rule of Five true 

PROPERTIES

PROPERTIES

Physical Property Safety Information Product Information Bioassay(PubChem)
Solubility
0.189 g/100 mL (0 °C)
0.173 g/100 mL (20 °C)
0.066 g/100 mL (100 °C) in water
expand Show data source
Slightly soluble in water. Soluble in glycerol, acids. Insoluble in alcohol expand Show data source
Soluble in glycerol and acids.
Insoluble in alcohol.
expand Show data source
Apperance
Powder expand Show data source
white powder expand Show data source
Melting Point
2570 °C expand Show data source
580 °C (loses water) expand Show data source
Decomposes at 580 °C (1076 °F) expand Show data source
Boiling Point
2850 °C expand Show data source
Decomposes at 580 °C (1076 °F) expand Show data source
Flash Point
Non-flammable expand Show data source
Density
2.211 g/cm3, solid expand Show data source
2.24 expand Show data source
2.24 at 20 °C (water = 1) expand Show data source
3.3-3.4 at 20 °C expand Show data source
Refractive Index
1.574 expand Show data source
Vapor Pressure
0 hPa at 20 °C expand Show data source
pKa
12.4 expand Show data source
pKb
2.37 expand Show data source
Odor
odorless expand Show data source
Std enthalpy of formation
-987 kJ·mol-1 expand Show data source
Std molar entropy
83 J·mol-1·K-1 expand Show data source
Solubility Product (Ksp)
4.68×10-6 expand Show data source
Storage Condition
Room Temperature (15-30°C) expand Show data source
Room Temperature (15-30°C), Desiccate expand Show data source
Storage Warning
Air Sensitive expand Show data source
RTECS
EW2800000 expand Show data source
EW3100000 expand Show data source
European Hazard Symbols
Corrosive Corrosive (C) expand Show data source
Irritant Irritant (Xi) expand Show data source
UN Number
1759 expand Show data source
1910 expand Show data source
UN3262 expand Show data source
MSDS Link
Download expand Show data source
Download expand Show data source
Hazard Class
8 expand Show data source
Packing Group
II expand Show data source
III expand Show data source
Australian Hazchem
2X expand Show data source
Risk Statements
34 expand Show data source
R:34 expand Show data source
R22, R34 expand Show data source
Safety Statements
26-36/37/39-45-60 expand Show data source
26-36/37/39-60 expand Show data source
S:26-27/28-36/37/39-46-64 expand Show data source
S2, S24 expand Show data source
EU Classification
C10 expand Show data source
EU Hazard Identification Number
8B expand Show data source
Emergency Response Guidebook(ERG) Number
154 expand Show data source
157 expand Show data source
TSCA Listed
expand Show data source
GHS Pictograms
GHS05 expand Show data source
NFPA704
NFPA 704 diagram
0
3
0
expand Show data source
LD50
7340 mg/kg (oral, rat)
7300 mg/kg (mouse)
expand Show data source
GHS Hazard statements
H314-H318 expand Show data source
GHS Precautionary statements
P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A expand Show data source
Purity
~97% expand Show data source
~99% expand Show data source
95% expand Show data source
95.0% min expand Show data source
Grade
ACS expand Show data source
REAGENT expand Show data source
Certificate of Analysis
Download expand Show data source
Download expand Show data source

DETAILS

DETAILS

MP Biomedicals MP Biomedicals Wikipedia Wikipedia
MP Biomedicals - 02193551 external link
ACS Reagent
Purity: ~99%
MP Biomedicals - 02193802 external link
Purity: ~97%

REFERENCES

REFERENCES

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PATENTS

PATENTS

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INTERNET

INTERNET

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