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.
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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/418/501/product-dating-information-06-25-mk.pdf
1.09257
Aquastar® CombiCoulomat fritless
reagent for coulometric Karl Fischer titration for cells with and without diaphragm, Aquastar®
Synonym(s):
Fritless Karl Fischer Reagent
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Product Name
CombiCoulomat fritless, Karl Fischer reagent for coulometric water determination for cells with and without diaphragm Aquastar®
material
diaphragm (No)
Quality Level
product line
Aquastar®
form
liquid
reaction suitability
reaction type: coulometric
technique(s)
Karl-Fischer titration: suitable
titration: suitable
pH
5.5 (20 °C in H2O)
transition temp
flash point 12 °C
density
0.92 g/cm3 at 20 °C
storage temp.
15-25°C
Analysis Note
Legal Information
related product
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 3 - Flam. Liq. 2 - STOT SE 1
Storage Class Code
3 - Flammable liquids
WGK
WGK 3
Flash Point(F)
53.6 °F
Flash Point(C)
12 °C
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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Protocols
Summary application report for analysis of moisture in Coffee extract (Instant coffee)
Accurately measure the moisture content in ethanolamine (HOCH₂CH₂NH₂) through Karl Fischer titration, using both volumetric or coulometric methods.
Accurately measure moisture content in kerosene through Karl Fischer titration, using both volumetric and coulometric methods for reliable results.
Summary application report for analysis of moisture in Perchloric acid 0.1 mol/L in acetic acid
Related Content
Karl Fischer 滴定法可測定原料和產品中的水含量，是一種廣泛使用的分析方法。
Karl Fischer 滴定法可測定原料和產品中的水含量，是一種廣泛使用的分析方法。
Karl Fischer titration determines water content in raw materials and products, a widely used analytical method.
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How can I determine the shelf life / expiration / retest date of this product?
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Helpful?
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Is the equivalence valor 1 for titrant reactions that uses this composite?
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This product has an equivalence value of 1.
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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
Helpful?
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Why is SO2 not listed on the SDS? Isn't SO2 required in Karl Fischer reaction?
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While sulfur dioxide (SO2) is added to Karl Fischer reagents during production, it is not listed in their composition in the Safety Data Sheet (SDS). This is because when all components are mixed, SO2 immediately reacts with the alcohol (R-OH, such as methanol) and the base (R'N), resulting in the formation of [RN]SO3CH3 according to reaction below:
R-OH + SO2 + R'N → [RN]SO3CH3 (reaction after production)
SO2 is vital for the reaction in Karl Fischer titration, as the reaction will not proceed without it. However, the SO2 present in the reagent is bound in the form of [RN]SO3CH3, and there is no free SO2 (SO2(g)/SO3-) present in any Karl Fischer reagent.
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