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/418/501/product-dating-information-06-25-mk.pdf
59845
Ammonium sulfate
analytical standard, for Nitrogen Determination According to Kjeldahl Method, traceable to NIST SRM 194
Synonym(s):
Mascagnite
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
25 g | Please contact Customer Service for Availability | CZK 1,450.00 |
About This Item
grade
analytical standard
Quality Segment
assay
≥99.5%
quality
traceable to NIST SRM 194
shelf life
limited shelf life, expiry date on the label
impurities
21.20%±0.10% total Kjeldahl nitrogen
loss
≤0.1% loss on drying, 110°C
pH
5.0-6.0 (25 °C, 1 M in H2O)
mp
>280 °C (dec.) (lit.)
solubility
soluble, clear, colorless
density
1.77 g/mL at 25 °C (lit.)
format
neat
SMILES string
N.N.OS(O)(=O)=O
InChI
1S/2H3N.H2O4S/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)
InChI key
BFNBIHQBYMNNAN-UHFFFAOYSA-N
Application
1 of 1
This Item | |||
|---|---|---|---|
| format neat | format - | format - | format - |
| mp >280 °C (dec.) (lit.) | mp >280 °C (dec.) (lit.) | mp >280 °C (dec.) (lit.) | mp >280 °C (dec.) (lit.) |
| grade analytical standard | grade - | grade - | grade ACS reagent |
| pH 5.0-6.0 (25 °C, 1 M in H2O) | pH 5.0-6 (25 °C, 132 g/L) | pH 5 (100 g/L in H2O) | pH 5 (100 g/L in H2O) |
| impurities 21.20%±0.10% total Kjeldahl nitrogen | impurities - | impurities - | impurities ≤0.001% Insoluble matter |
| shelf life limited shelf life, expiry date on the label | shelf life - | shelf life - | shelf life - |
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Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
Regulatory Listings
Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.
7783-20-2
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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