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
Synonyme(s) :
Hydroxyde d'ammonium solution, Ammoniaque
Sélectionner une taille de conditionnement
Sélectionner une taille de conditionnement
About This Item
Produits recommandés
Nom du produit
Solution d'ammoniaque (25 %), for analysis EMSURE® ISO,Reag. Ph Eur
Agence
reag. ISO
reag. Ph. Eur.
Niveau de qualité
Pression de vapeur
483 hPa ( 20 °C)
Gamme de produits
EMSURE®
Forme
liquid
Limite d'explosivité
27 %
pb
37.7 °C/1013 hPa
Pf
-57.5 °C
Densité
0.9 g/mL at 25 °C (lit.)
Température de stockage
2-30°C
Chaîne SMILES
[NH4+].[OH-]
InChI
1S/H3N.H2O/h1H3;1H2
Clé InChI
VHUUQVKOLVNVRT-UHFFFAOYSA-N
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Catégories apparentées
Description générale
Application
- comme régulateur du pH pour assurer des conditions basiques bénéfiques.
- pour mesurer précisément les chlorures dans le sérum humain.
Caractéristiques et avantages
- Spécifications les plus complètes au monde
- Jusqu'à 70 paramètres testés
- Pureté extraordinaire
- Valeurslimites très basses
- Plus grande précision et meilleur contrôle des analyses
- Optimisé pour des analyses très critiques et exigeantes
- Idéalpour le développement de méthodes
- Pasd'interférence ni de contamination due à des impuretés inconnues
Conditionnement
Veuillez noter les remplacements suivants :
1054321000 (flacon de verre de 1 litre) remplacé par 1054321011 (flacon de PEHD de 1 litre)
1054322500 (flacon de verre de 2,5 litres) remplacé par 1054322511 (flacon de PEHD de 2,5 litres)
Vous trouverez de plus amples informations sur nos flacons de PEHD ergonomiques et incassables à cette adresse : www.SigmaAldrich.com/hdpe-bottle
Informations légales
Mention d'avertissement
Danger
Mentions de danger
Conseils de prudence
Classification des risques
Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B - STOT SE 3
Organes cibles
Respiratory system
Code de la classe de stockage
8B - Non-combustible, corrosive hazardous materials
Classe de danger pour l'eau (WGK)
WGK 2
Certificats d'analyse (COA)
Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".
Déjà en possession de ce produit ?
Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.
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Contenu apparenté
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 réponse-
Utile ?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 réponse-
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
Utile ?
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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 réponse-
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/qc1593Utile ?
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