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
1.09255
CombiCoulomat avec disque fritté
Karl Fischer reagentfor the coulometric water determinationfor cells with diaphragm Aquastar®
Synonyme(s) :
Fritté pour réactif coulométrique
Sélectionner une taille de conditionnement
Sélectionner une taille de conditionnement
About This Item
Produits recommandés
Matériaux
diaphragm (Yes)
Niveau de qualité
Gamme de produits
Aquastar®
Forme
liquid
Capacité de réaction
reaction type: coulometric
Technique(s)
Karl-Fischer titration: suitable
titration: suitable
pH
5 (20 °C in H2O)
Température de transition
flash point 12 °C
Densité
0.90 g/cm3 at 20 °C
Température de stockage
15-25°C
Catégories apparentées
Informations légales
Produit(s) apparenté(s)
Mention d'avertissement
Danger
Mentions de danger
Conseils de prudence
Classification des risques
Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Flam. Liq. 2 - STOT SE 1
Code de la classe de stockage
3 - Flammable liquids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
53.6 °F
Point d'éclair (°C)
12 °C
Listes réglementaires
Les listes réglementaires sont principalement fournies pour les produits chimiques. Seules des informations limitées peuvent être fournies ici pour les produits non chimiques. L'absence d'indication signifie qu'aucun des composants n'est répertorié. Il incombe à l'utilisateur de s'assurer de l'utilisation sûre et légale du produit.
EU REACH Annex XVII (Restriction List)
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.
Protocoles
Summary application report for analysis of moisture in Biodiesel
Summary application report for analysis of moisture in Perchloric acid 0.1 mol/L in acetic acid
Summary application report for analysis of moisture in Acids, aqueous
Determination of Water Content in D(+)-lactose-monohydrate Using Karl Fischer Titration
-
How is shipping temperature determined? And how is it related to the product storage temperature?
1 réponse-
Utile ?
-
-
How can I determine the shelf life / expiration / retest date of this product?
1 réponse-
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.pdfUtile ?
-
-
What is frit and fritless coulometer reagents, the difference. Are reagents used for volumetric kf titration and for coulometer titration same?
1 réponse-
In conventional, or fritted-cell, coulometric KF, a diaphragm – or frit – separates the anode from the cathode that form the electrolytic cell known as the generator electrode. The purpose of the frit is to prevent the iodine generated at the anode from being reduced back to iodide at the cathode instead of reacting with water.
In fritless-cell coulometric KF, an innovative cell design is used that through a combination of factors, but without a frit, makes it nearly impossible for iodine to reach the cathode and get reduced to iodide instead of reacting with water.
Fritless method only uses one reagent. The CombiCoulomat fritless reagents can be used universally for cells with or without diaphragm. Both reagents, CombiCoulomat frit and CombiCoulomat fritless are, of course, free from chlorinated hydrocarbons. The coulometric reagents Aquastar® CombiCoulomat frit and CombiCoulomat fritless are comparable to the volumetric one component reagents. All reaction components are contained in one solution. This makes handling easier for the user.
Compared with volumetric reagents, coulometric reagents do not contain iodine, but iodide. The iodine required for the Karl Fischer reaction to take place develops through electrochemical oxidation. The coulometric method is primarily used for the determination of low water contents (< 1%).
Utile ?
-
Filtres actifs
Notre équipe de scientifiques dispose d'une expérience dans tous les secteurs de la recherche, notamment en sciences de la vie, science des matériaux, synthèse chimique, chromatographie, analyse et dans de nombreux autres domaines..
Contacter notre Service technique
