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/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®
Synonyma:
Fritless Karl Fischer Reagent
Vybrat velikost
3 140,00 Kč
13 700,00 Kč
3 140,00 Kč
O této položce
Přeskočit na
Název produktu
CombiCoulomat fritless, Karl Fischer reagent for coulometric water determination for cells with and without diaphragm Aquastar®
material
diaphragm (No)
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
Quality Level
1 of 2
Tato položka | |
|---|---|
| reaction suitability reaction type: coulometric | reaction suitability reaction type: coulometric |
| technique(s) Karl-Fischer titration: suitable | technique(s) Karl-Fischer titration: suitable |
| material diaphragm (No) | material diaphragm (Yes) |
| product line Aquastar® | product line Aquastar® |
| form liquid | form liquid |
| pH 5.5 (20 °C in H2O) | pH 5 (20 °C in H2O) |
Analysis Note
Legal Information
related product
signalword
Danger
Hazard Classifications
Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 3 - Flam. Liq. 2 - STOT SE 1
Skladovací třída
3 - Flammable liquids
wgk
WGK 3
flash_point_f
53.6 °F
flash_point_c
12 °C
Seznamy omezení vyplývajících z předpisů
Seznamy omezení vyplývajících z předpisů jsou poskytovány zejména pro chemické produkty. Pro jiné než chemické produkty lze poskytovat pouze omezené informace. Žádný záznam znamená, že v seznamech není obsažena žádná ze součástí. Povinností uživatele je zajistit bezpečné a zákonné použití produktu.
75-25-2 + 67-56-1
Osvědčení o analýze (COA)
Vyhledejte osvědčení Osvědčení o analýze (COA) zadáním čísla šarže/dávky těchto produktů. Čísla šarže a dávky lze nalézt na štítku produktu za slovy „Lot“ nebo „Batch“.
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Sortimentní položky
Metody zahrnující interní extrakci, externí extrakci a Karl Fischerovu pec zajišťují přesné stanovení obsahu vody titrací.
Protokoly
Souhrnná zpráva o použití pro analýzu vlhkosti v pyridinu
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
Související obsah
Karl Fischerova titrace určuje obsah vody v surovinách a výrobcích, což je široce používaná analytická metoda.
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
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Is the equivalence valor 1 for titrant reactions that uses this composite?
1 answer-
This product has an equivalence value of 1.
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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Why is SO2 not listed on the SDS? Isn't SO2 required in Karl Fischer reaction?
1 answer-
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.
Helpful?
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