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
推荐产品
产品名称
氨溶液32%, EMPLURA®
蒸汽压
837 hPa ( 20 °C)
质量水平
产品线
EMPLURA®
表单
liquid
expl. lim.
27 %
浓度
≥30% (NH3, acidimetric)
杂质
≤0.0001% Heavy metals (as Pb)
≤0.0005% Fe (Iron)
≤0.0008% Substances reducing potassium permanganate (as O)
≤0.002% Chloride (Cl)
≤0.003% Sulphate (SO?)
灼烧残渣
≤0.003% (as sulphates)
颜色
APHA: ≤10
沸点
37.7 °C/1013 hPa
mp
-91.5 °C
密度
0.9 g/mL at 25 °C (lit.)
储存温度
2-30°C
SMILES字符串
[NH4+].[OH-]
InChI
1S/H3N.H2O/h1H3;1H2
InChI key
VHUUQVKOLVNVRT-UHFFFAOYSA-N
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应用
- Highly Efficient Recovery of Au(I) from Gold Leaching Solution Using Sodium Dimethyldithiocarbamate.: 本研究探讨了如何在富氨环境中使用二甲基二硫代氨基甲酸钠有效回收金，重点介绍了与氨溶液的相互作用及其对浸出过程的影响 (Yang et al., 2024)。
- Oxidation mechanism of pyrite in a thiosulfate solution: electrochemical impedance (EIS) and in situ Raman spectroscopy.: 本研究探索了硫代硫酸盐溶液中氨促进的黄铁矿氧化过程，研究了氧化机理中涉及的电化学性质和动力学(Tamayo et al., 2023)。
包装
请注意以下替换信息：
1054261000 （1 L 玻璃瓶）已经被1054261011 （1 L HDPE瓶）取代
1054262500 （2.5 L玻璃瓶）已经被1054262511 （2.5 L HDPE 瓶）取代
有关我们符合人体工程学、不可破碎的HDPE 瓶的更多信息，请浏览: www.SigmaAldrich.com/hdpe-bottle
分析说明
鉴别：通过测试
颜色： ≤ 10 色度
氯化物（Cl）： ≤ 0.002％
硫酸盐（SO₄）： ≤ 0.003 %
重金属（以铅计）： ≤ 0.0001 %
Fe（铁）： ≤ 0.0005 %
还原高锰酸钾的物质（以O计）： ≤ 0.0008 %
炽灼残渣（以硫酸盐计）： ≤ 0.003 %
法律信息
警示用语：
Danger
危险分类
Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - STOT SE 3
靶器官
Respiratory system
储存分类代码
8B - Non-combustible, corrosive hazardous materials
WGK
WGK 2
实验方案
A guide to create solvent systems used for the thin-layer chromatography assay of Novabiochem products.
相关内容
Our ergonomic 1 L HDPE bottle for acids, bases, and solvents provide an alternative to glass chemical bottles for lab safety in pouring & handling of hazardous chemicals in the laboratory.
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
Helpful?
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Is the 32% NH3 concentration expressed as %w/w?
1 answer-
The concentration is expressed as %w/w.
Helpful?
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Is Emplura ammonia solution 32% considered technical grade or higher purity?
1 answer-
This product is considered research grade.
Helpful?
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you say that 28% solution of NH3 is a 56.6% NH4OH for calculating molarity. Can you explain the conversion of 28% to 56.6%? What would be the molarity of a 31% NH3 solution of ammonium hydroxide?
1 answer-
It should be 57.6% NH4OH, not 56.6% NH4OH. Using 17.034 as the molecular weight for NH3 and 35.0494 as the molecular weight weight for NH4OH, the calculation would be: (28 grams NH3/100 grams of solution) X (35.0494 grams NH4OH / 17.034 grams NH3) = 57.6 grams NH4OH per 100 grams of solution, or 57.6%.
To calculate the molarity, the density of a 31% NH3 solution is needed. For the calculation, please note that the weight percentage is for NH3, molecular weight 17.034. (31 grams of NH3 / 100 grams of solution) X (890 grams of solution / Liter of solution) X (1 mole NH3 / 17.034 grams NH3) X (1 mole NH4OH / 1 mole NH3) = 16.2 (16.197) moles NH4OH per Liter. The molarity would be 16.2 M.
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