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
1.05432
Ammonia solution
25%, for analysis EMSURE® ISO,Reag. Ph Eur
Synonym(s):
Ammonium hydroxide solution, Ammonium hydroxide solution, Ammonia water, Ammonia aqueous, Ammonia water
About This Item
reag. Ph. Eur.
Recommended Products
Product Name
Ammonia solution 25%, for analysis EMSURE® ISO,Reag. Ph Eur
Agency
reag. ISO
reag. Ph. Eur.
Quality Level
vapor pressure
483 hPa ( 20 °C)
product line
EMSURE®
form
liquid
expl. lim.
27 %
bp
37.7 °C/1013 hPa
mp
-57.5 °C
density
0.9 g/mL at 25 °C (lit.)
storage temp.
2-30°C
SMILES string
[NH4+].[OH-]
InChI
1S/H3N.H2O/h1H3;1H2
InChI key
VHUUQVKOLVNVRT-UHFFFAOYSA-N
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Related Categories
General description
Application
- As a pH-adjusting agent to ensure beneficial alkaline conditions.
- For the accurate measurement of chloride in human serum.
Features and Benefits
- Most extensive specifications worldwide
- Tested for up to 70 parameters
- Extraordinary purity
- Verylow limiting values
- Greater accuracy and control of analyses
- Optimized for highly critical and demanding analyses
- Idealfor method development
- Nointerference or contamination due to unknown impurities
Packaging
Please note the following replacements:
1054321000 (1 L glass bottle) replaced by 1054321011 (1 L HDPE bottle)
1054322500 (2.5 L glass bottle) replaced by 1054322511 (2.5 L HDPE bottle)
More information about our ergonomic and unbreakable HDPE bottles can be found here: www.SigmaAldrich.com/hdpe-bottle
Legal Information
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Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
8B - Non-combustible, corrosive hazardous materials
WGK
WGK 2
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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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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Hello, I need a known concentration of NH4OH in order to make a standard curve by injecting it into the GC-MS. I wonder to know which one of these ammonia solutions might be correct for this application.
1 answer-
This product is the dissolution of ammonia NH3 in the gaseous state in water (at the most widely used concentration of 25 to 30%). The concentration of an aqueous ammonia solution is measured on the basis of NH3 because ammonium hydroxide NH4OH does not actually exist, it is a solution of NH3 in water: NH3 + H2O = NH4 + + HO- .
The concentration can be calculated using the molecular weight and density. The density of the product is 0.9 g/mL, at 25%, so the molarity = Density x w/w% x 1000 / Mw = 0.9 g/mL x 25% x 1000 / 35.05 g/mol = 6.42 mol/L.
This product is not GC grade, nor are any ammonia solution or ammonium hydroxide solution products currently offered. 1.05432 is a very high grade of ammonium hydroxide solution with a lot-specific percentage purity reported on the Certificate of Analysis.
QC1593 is a Certified Reference Material with a certified concentration and uncertainty reported on the Certificate of Analysis. The concentration in QC1593 is much lower, with the current lot (LRAD5461) having a value of 0.892 ± 0.030 mg/L reported in the Certificate of Analysis. It is intended for use in UV-vis spectroscopy, but it may be more in the concentration range and application desired for a calibration curve. Please see the product link below:
https://www.sigmaaldrich.com/product/sial/qc1593Helpful?
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