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515809

Sigma-Aldrich

Ammonio solfuro

40-48 wt. % in H2O

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500 ML
338,00 €

338,00 €


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500 ML
338,00 €

About This Item

Formula condensata:
(NH4)2S
Numero CAS:
Peso molecolare:
68.14
Numero MDL:
Codice UNSPSC:
12352300
eCl@ss:
38030205
ID PubChem:
NACRES:
NA.21

338,00 €


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Grado

for analytical purposes

Livello qualitativo

Stato

liquid

Concentrazione

40-48 wt. % in H2O
40.0-48.0% (titration by Na2S2O3)

Indice di rifrazione

n20/D 1.467

P. ebollizione

40 °C

Densità

1 g/mL at 25 °C

Stringa SMILE

N.N.S

InChI

1S/2H3N.H2S/h2*1H3;1H2
UXXGWUQNRMPNKH-UHFFFAOYSA-N

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Categorie correlate

Descrizione generale

Ammonium sulfide solution (aqueous ammonium sulfide) is a 40-48wt.% solution in water. Ammonium sulfide is an inorganic salt with a sulfurous odor, which is commonly used in the food industry as a flavoring agent.[1] The influence of ammonium sulfide treatment on (100)GaAs (gallium arsenide) surfaces has been studied by x-ray photoelectron spectroscopy (XPS) and reflection high-energy electron diffraction (RHEED).[2] Its potential as an alternative to hydrogen sulfide for the transformation of activated amides to thioamides by thiolysis has been investigated.[3] The reaction of ammonium sulfide with 3-hydroxy-2-butanone over a range of temperature has been reported to form various flavor compounds.[4]

Applicazioni

Ammonium sulfide solution may be used to enhance the performance of type-II InAs/GaSb super lattice photodiodes by surface passivation technique.[5]

Avvertenze

Danger

Indicazioni di pericolo

Classi di pericolo

Aquatic Acute 1 - Flam. Liq. 2 - Skin Corr. 1B

Rischi supp

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

68.0 °F - closed cup

Punto d’infiammabilità (°C)

20 °C - closed cup


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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I clienti hanno visto anche

Slide 1 of 2

1 of 2

Carpenter MS, et al.
J. Vac. Sci. Technol. B, 7(4), 845-850 (1989)
Mild method for the conversion of amides to thioamides.
Charette AB and Grenon M.
The Journal of Organic Chemistry, 68(14), 5792-5794 (2003)
Ammonium sulfide passivation of Type-II InAs/GaSb superlattice photodiodes.
Gin A, et al.
Applied Physics Letters, 84(12), 2037-2039 (2004)
Burdock GA.
Encyclopedia of Food and Color Additives, 1, 142-142 (1997)
J Xi et al.
Journal of agricultural and food chemistry, 47(1), 245-248 (1999-11-24)
The reactions between 3-hydroxy-2-butanone and ammoniun sulfide at 25, 50, 75, 100, 125, and 150 degrees C were studied. Four well-known flavor compounds, 2,4,5-trimethyloxazole, 2,4, 5-trimethyl-3-oxazoline, 2,4,5-trimethylthiazole, and 2,4, 5-trimethyl-3-thiazoline, were identified. Another four interesting intermediate compounds, 2-(1-hydroxyethyl)-2,4, 5-trimethyl-3-oxazoline, 2-(1-mercaptoethyl)-2,4

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  1. 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?

  2. 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?

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