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Merck

239232

Calcium hydroxide

ACS reagent, ≥95.0%

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Fórmula lineal:
Ca(OH)2
Número CAS:
1305-62-0
Peso molecular:
74.09
NACRES:
NB.24
PubChem Substance ID:
329752521
UNSPSC Code:
12352305
EC Number:
215-137-3
MDL number:
MFCD00010901
Assay:
≥95.0%
Grade:
ACS reagent
Form:
powder

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InChI key

AXCZMVOFGPJBDE-UHFFFAOYSA-L

InChI

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

SMILES string

O[Ca]O

grade

ACS reagent

assay

≥95.0%

form

powder

impurities

≤0.03% insol. in HCl, ≤0.1% S compounds, ≤3.0% calcium carbonate

pH

12.4-12.6 (20 °C)

density

2.24 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.03%

cation traces

Fe: ≤0.05%, K: ≤0.05%, Mg: ≤0.5%, Na: ≤0.05%, Sr: ≤0.05%, heavy metals: ≤0.003% (by ICP)

Quality Level

200

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General description

Calcium hydroxide is commonly used in wastewater treatment plants (WWTPs) to adjust pH. Calcium hydroxide has numerous applications due to its strong basic characteristics. Uses include flocculants in water and sewage treatment, a whitewash ingredient, soil improvement, as a lye substitute in non-lye hair relaxers, and in the liming industry to neutralize the acid.

Application

Calcium hydroxide can be used:
  • In the pretreatment of technical lignin during the pyrolysis in a fluidized bed reactor to overcome the agglomeration to produce phenolic-rich bio-oil.
  • As a catalyst in the pyrolysis of pinewood in a fixed bed reactor.

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

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

target_organs

Respiratory system

Clase de almacenamiento

13 - Non Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificados de análisis (COA)

Lot/Batch Number
MKCZ9864
MKCZ5440
0000484130
0000484130
MKCX7048

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The antibacterial effect of camphorated paramonochlorophenol, camphorated phenol and calcium hydroxide in the treatment of infected root canals.
A Bystrom et al.
Endodontics & dental traumatology, 1(5), 170-175 (1985-10-01)
U Schröder
Journal of dental research, 64 Spec No, 541-548 (1985-04-01)
The findings from the recent literature on pulpal cell responses to the application of calcium hydroxide to exposed pulps are described. The effect of calcium hydroxide on healthy and inflamed pulp is discussed. The effect of incorporation of calcium hydroxide
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
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
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
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