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515809

Sigma-Aldrich

Ammoniumsulfid -Lösung

40-48 wt. % in H2O

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About This Item

Lineare Formel:
(NH4)2S
CAS-Nummer:
12135-76-1
Molekulargewicht:
68.14
MDL-Nummer:
MFCD00010892
UNSPSC-Code:
12352300
eCl@ss:
38030205
PubChem Substanz-ID:
329757716
NACRES:
NA.21
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Qualität

for analytical purposes

Qualitätsniveau

200

Form

liquid

Konzentration

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

Brechungsindex

n20/D 1.467

bp

40 °C

Dichte

1 g/mL at 25 °C

SMILES String

N.N.S

InChI

1S/2H3N.H2S/h2*1H3;1H2

InChIKey

UXXGWUQNRMPNKH-UHFFFAOYSA-N

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Allgemeine Beschreibung

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]

Anwendung

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

Signalwort

Danger

Gefahreneinstufungen

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

Zusätzliche Gefahrenhinweise

EUH031

Lagerklassenschlüssel

3 - Flammable liquids

WGK

WGK 3

Flammpunkt (°F)

68.0 °F - closed cup

Flammpunkt (°C)

20 °C - closed cup

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Analysenzertifikate (COA)

Lot/Batch Number
0000411751
0000411751
0000307958
0000307957
0000307957

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Cer(IV)-sulfat

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359009

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Molybdän(VI)-oxid 99.97% trace metals basis

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203815

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Lithiumsulfid 99.98% trace metals basis

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213241

Lithiumsulfid

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)
Anat Arzi et al.
Chemical senses, 35(1), 31-40 (2009-11-18)
To assess the feasibility of using odors as a potential mechanism for treating sleep apnea, we set out to test the hypothesis that odorants delivered during sleep would modify respiratory patterns without inducing arousal or wake in healthy sleepers. We
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Questions

1–2 of 2 Questions  

  1. 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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  2. 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

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