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515809

Sigma-Aldrich

Ammonium sulfide solution

40-48 wt. % in H2O

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NOK 899.00
500 ML
NOK 2,990.00

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100 ML
NOK 899.00
500 ML
NOK 2,990.00

About This Item

Linear Formula:
(NH4)2S
CAS Number:
12135-76-1
Molecular Weight:
68.14
MDL number:
MFCD00010892
UNSPSC Code:
12352300
eCl@ss:
38030205
PubChem Substance ID:
329757716
NACRES:
NA.21
form:
liquid

NOK 899.00

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form

liquid

Quality Level

200

concentration

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

refractive index

n20/D 1.467

bp

40 °C

density

1 g/mL at 25 °C

SMILES string

N.N.S

InChI

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

InChI key

UXXGWUQNRMPNKH-UHFFFAOYSA-N

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General description

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]

Application

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

Signal Word

Danger

Hazard Statements

H225,H314,H400

Hazard Classifications

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

Supplementary Hazards

EUH031

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

68.0 °F - closed cup

Flash Point(C)

20 °C - closed cup

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Certificates of Analysis (COA)

Lot/Batch Number
0000411751
0000411751
0000307958
0000307957
0000307957

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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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Questions

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  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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