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
1.09255
Frita CombiCoulomat
Karl Fischer reagentfor the coulometric water determinationfor cells with diaphragm Aquastar®
Sinónimos:
Frita reactiva columbimétrica
About This Item
Productos recomendados
Materiales
diaphragm (Yes)
Nivel de calidad
Línea del producto
Aquastar®
Formulario
liquid
idoneidad de la reacción
reaction type: coulometric
técnicas
Karl-Fischer titration: suitable
titration: suitable
pH
5 (20 °C in H2O)
temperatura de transición
flash point 12 °C
densidad
0.90 g/cm3 at 20 °C
temp. de almacenamiento
15-25°C
Categorías relacionadas
Información legal
Producto relacionado
Palabra de señalización
Danger
Frases de peligro
Consejos de prudencia
Clasificaciones de peligro
Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Flam. Liq. 2 - STOT SE 1
Código de clase de almacenamiento
3 - Flammable liquids
Clase de riesgo para el agua (WGK)
WGK 3
Punto de inflamabilidad (°F)
53.6 °F
Punto de inflamabilidad (°C)
12 °C
Certificados de análisis (COA)
Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»
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Protocolos
Summary application report for analysis of moisture in Biodiesel
Determination of Water Content in D(+)-lactose-monohydrate Using Karl Fischer Titration
Summary application report for analysis of moisture in Lyophilisates.
Summary application report for analysis of moisture in Acids, aqueous
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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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What is frit and fritless coulometer reagents, the difference. Are reagents used for volumetric kf titration and for coulometer titration same?
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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%).
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