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243469

Sigma-Aldrich

Zinc

Zinc

granular, 20-30 mesh, ACS reagent, ≥99.8%

Sinonimo/i:

Zn

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100 G
40,20 €
500 G
170,00 €
2 KG
318,00 €

40,20 €


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100 G
40,20 €
500 G
170,00 €
2 KG
318,00 €

About This Item

Formula empirica (notazione di Hill):
Zn
Numero CAS:
Peso molecolare:
65.39
Numero CE:
Numero MDL:
Codice UNSPSC:
12161600
ID PubChem:
NACRES:
NA.22

40,20 €


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Grado

ACS reagent

Livello qualitativo

Tensione di vapore

1 mmHg ( 487 °C)

Saggio

≥99.8%

Stato

granular

Impiego in reazioni chimiche

core: zinc
reagent type: catalyst

Resistività

5.8 μΩ-cm, 20°C

Dimensione particelle

20-30 mesh

P. ebollizione

907 °C (lit.)

Punto di fusione

420 °C (lit.)

Densità

7.133 g/mL at 25 °C (lit.)

Cationi in tracce

Fe: ≤0.01%
Pb: ≤0.01%

Compatibilità

passes application test for determination of arsenic (As)

Stringa SMILE

[Zn]

InChI

1S/Zn
HCHKCACWOHOZIP-UHFFFAOYSA-N

Descrizione generale

Zinc granules are pure metallic zinc in a granular form, they provide a high surface area for increased reactivity.[1] They serve as a reducing agent, catalyst, or precursor for various chemical reactions. Zinc granules are commonly used for synthesis of organometallic compounds. It reacts with organic halides to form alkyl or aryl zinc compounds, which serve as powerful nucleophiles in carbon-carbon bond formations. This reaction, known as the Barbier reaction, enables the introduction of diverse functional groups into organic molecules.[2]Zinc granules also find application in the synthesis of pharmaceuticals and fine chemicals. They can be employed in the reduction of functional groups like nitro, nitrile, or azide to their corresponding amines. Additionally, zinc granules are involved in other carbon-carbon bond forming reactions, such as the Reformatsky reaction and the Simmons-Smith reaction.[2]

Applicazioni

Zinc granules can be used to prepare:

  • organozinc reagents commonly used in Negishi or Fukuyama couplings[3][4]
  • Reformatsky reagents[5][6]
  • Simmons-Smith reagents[7][8]

Pittogrammi

Environment

Avvertenze

Warning

Indicazioni di pericolo

Consigli di prudenza

Classi di pericolo

Aquatic Acute 1 - Aquatic Chronic 1

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 2

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Gloves, type N95 (US)


Elenchi normativi

Forniamo informazioni su eventuali restrizioni prevalentemente per i prodotti chimici. Per altre tipologie di prodotto siamo in grado di fornire soltanto informazioni limitate. Nessuna segnalazione significa che nessuno dei componenti è citato in un elenco. È dovere dell’utilizzatore assicurarsi che il prodotto venga impiegato in maniera sicura e a norme di legge.

EU REACH Annex XVII (Restriction List)

CAS No.

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Certificati d'analisi (COA)

Lot/Batch Number

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Zinc

Reagents for Organic Synthesis
L. F. Fieser and M. Fieser
Reagents for Organic Synthesis, 1 (1967)
A scalable zinc activation procedure using dibal-h in a reformatsky reaction.
Girgis M J
Organic Process Research & Development, 13(6), 1094-1099 (2009)
Advanced Organic Chemistry: Reactions, Mechanisms, and Structure
March, J
Advanced Organic Chemistry (2007)
Use of activation methods for organozinc reagents.
Erdik E
Tetrahedron, 43(10), 2203-2212 (1987)
Highly efficient, general procedure for the preparation of alkylzinc reagents from unactivated alkyl bromides and chlorides.
Huo S
Organic Letters, 5(4), 423-425 (2003)

Domande

1–2 di 2 domande  
  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 risposta
    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

      Utile?

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

    1 risposta
    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

      Utile?

Recensioni

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