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
338818
氢氧化铵 溶液
28% NH3 in H2O, ≥99.99% trace metals basis
别名:
氨水, 阿摩尼亚水
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产品名称
氢氧化铵 溶液, 28% NH3 in H2O, ≥99.99% trace metals basis
InChI
1S/H3N.H2O/h1H3;1H2
SMILES string
[NH4+].[OH-]
InChI key
VHUUQVKOLVNVRT-UHFFFAOYSA-N
assay
≥99.99% trace metals basis
form
liquid
expl. lim.
27 %
concentration
28% NH3 in H2O
pH
11.7 (20 °C)
Quality Level
solubility
water: soluble
density
0.9 g/mL at 25 °C (lit.)
0.9 g/mL at 25 °C
storage temp.
2-8°C
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此商品 | 221228 | 17093 | 05002 |
|---|---|---|---|
| concentration 28% NH3 in H2O | concentration 28.0-30.0% NH3 | concentration ≥25% NH3 in H2O | concentration 30-33% NH3 in H2O |
| assay ≥99.99% trace metals basis | assay - | assay - | assay - |
| Quality Level 100 | Quality Level 200 | Quality Level 100 | Quality Level - |
| form liquid | form liquid | form liquid | form liquid |
| pH 11.7 (20 °C) | pH 11.7 (20 °C) | pH 11.7 (20 °C) | pH 11.7 (20 °C) |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C |
Application
- 通过使用二价或三价铁盐作为铁前体的改良可控化学共沉淀法制备磁性（Fe3O4）纳米颗粒的介质。
- 氨解反应的试剂。
- 通过一锅法缩合醛和乙酰乙酸烷基酯合成1，4 二氢吡啶的溶剂。
General description
signalword
Danger
hcodes
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1 - STOT SE 3
target_organs
Respiratory system
存储类别
8B - Non-combustible corrosive hazardous materials
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
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实验方案
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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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Is the concentration of item 338818-1L expressed as % w/w?
1 answer-
Yes.
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