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239232

Sigma-Aldrich

氢氧化钙

ACS reagent, ≥95.0%

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About This Item

線性公式:
Ca(OH)2
CAS號碼:
分子量::
74.09
EC號碼:
MDL號碼:
分類程式碼代碼:
12352305
PubChem物質ID:
NACRES:
NB.24
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等級

ACS reagent

化驗

≥95.0%

形狀

powder

雜質

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

pH值

12.4-12.6 (20 °C)

密度

2.24 g/mL at 25 °C (lit.)

負離子痕跡

chloride (Cl-): ≤0.03%

正離子痕跡

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

SMILES 字串

O[Ca]O

InChI

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

InChI 密鑰

AXCZMVOFGPJBDE-UHFFFAOYSA-L

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一般說明

氢氧化钙通常用于污水处理厂(WWTP)调节pH值。氢氧化钙由于其强碱性而具有许多应用。用途包括水和污水处理中的絮凝剂、石灰水成分、土壤改良、作为非碱液头发松弛剂中的碱液替代品,以及在石灰工业中中和酸。

應用

氢氧化钙可用于:
  • 在流化床反应器中热解期间对工业木质素进行预处理,以克服团聚产生富含酚类的生物油。
  • 在固定床反应器中作为松木热解的催化剂。

象形圖

CorrosionExclamation mark

訊號詞

Danger

危險聲明

危險分類

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

標靶器官

Respiratory system

儲存類別代碼

13 - Non Combustible Solids

水污染物質分類(WGK)

WGK 1

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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分析證明 (COA)

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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
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

Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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