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Sigma-Aldrich

Calcium hydroxide

puriss., meets analytical specification of Ph. Eur., USP, FCC, 95-100.5% (complexometric)

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About This Item

Linear Formula:
Ca(OH)2
CAS Number:
1305-62-0
Molecular Weight:
74.09
EC Number:
215-137-3
MDL number:
MFCD00010901
UNSPSC Code:
12352305
PubChem Substance ID:
329749601
NACRES:
NA.21

grade

puriss.

assay

95-100.5% (complexometric)

form

powder

quality

meets analytical specification of Ph. Eur., USP, FCC

impurities

≤0.2% insoluble in hydrochloric acid
≤2.5% subst. not precip. by ammonium oxalate (as SO4)

pH

12.4-12.6 (20 °C)

density

2.24 g/mL at 25 °C (lit.)

anion traces

fluoride (F-): ≤50 mg/kg

cation traces

As: ≤3 mg/kg
Cu: ≤10 mg/kg
Fe: ≤1000 mg/kg
Pb: ≤2 mg/kg
Zn: ≤10 mg/kg

SMILES string

O[Ca]O

InChI

1S/Ca.2H2O/h;2*1H2/q+2;;/p-2

InChI key

AXCZMVOFGPJBDE-UHFFFAOYSA-L

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pictograms

CorrosionExclamation mark
GHS05,GHS07

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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Nikte Gómez-Ortíz et al.
ACS applied materials & interfaces, 5(5), 1556-1565 (2013-01-26)
The presence and deteriorating action of microbial biofilms on historic stone buildings have received considerable attention in the past few years. Among microorganisms, fungi are one of the most damaging groups. In the present work, antimicrobial surfaces were prepared using
Lisbet Mailin López González et al.
Bioresource technology, 131, 250-257 (2013-01-29)
Different pre-treatment severities by thermo-alkaline conditions (100°C, Ca(OH)2) on press mud were evaluated for different pre-treatment time and lime loading. COD solubilization and the methane yield enhancement were assessed. The biochemical methane potential was determined in batch assays under mesophilic
P Sangwan et al.
International endodontic journal, 46(1), 3-19 (2012-08-15)
Calcium hydroxide has been used extensively in dentistry for a century. Despite its widespread use as a pulp-capping agent, its mechanisms of action still remain ambiguous. Understanding its modes of action will lead to a broader understanding of the mechanisms
Z Mohammadi et al.
International endodontic journal, 44(8), 697-730 (2011-05-04)
Calcium hydroxide has been included within several materials and antimicrobial formulations that are used in a number of treatment modalities in endodontics. These include, inter-appointment intracanal medicaments, pulp-capping agents and root canal sealers. Calcium hydroxide formulations are also used during
J F Siqueira et al.
International endodontic journal, 32(5), 361-369 (1999-11-07)
Literature review The primary function of calcium hydroxide as a routine intracanal medicament is to provide antimicrobial activity. However, the mechanisms of antimicrobial activity of calcium hydroxide are not well known. Physicochemical properties of this substance may limit its effectiveness
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