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
1.06277
Sodium arsenite solution
c(NaAsO₂) = 0.05 mol/l (0,1 N), reag. USP, ready-to-use volumetric solution for titration, Titripur®
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| A ustedes/SKU | Disponibilidad | Precio |
|---|---|---|
1 L | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 86,90 € |
1 L | Fecha estimada de envío28 de julio de 2026desdeMerck Chemicals and LS SA | 91,20 € 68,40 € |
Acerca de este artículo
86,90 €
Nombre del producto
Sodium arsenite solution, c(NaAsO2) = 0.05 mol/l (0,1 N), Titripur®, reag. USP
agency
reag. USP
Quality Segment
product line
Titripur®
form
liquid
quality
Analyzed in our ISO 17025 accredited QC lab
reaction suitability
reaction type: Redox Reactions
concentration
0.05 M
technique(s)
titration: suitable
pH
9.3 (20 °C in H2O)
density
1.005 g/m3 at 20 °C
storage temp.
15-25°C
Features and Benefits
ChemiSphere™ App for Digital Data Transfer to OMNIS Titration Instruments from Metrohm
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SmartChemicals for Digital Data Transfer to Mettler Toledo Titration Instruments
Explore digital data transfer with our SmartChemicals for Mettler Toledo titrators—fast, easy, and safe, accelerating the titration process with Titripur®, Aquastar® reagents, and Certipur® and Aquastar® standards. Supelco® SmartChemicals for Titration
This volumetric solution is analyzed by our calibration laboratory D-K-15185-01-00 which is accredited according to DIN EN ISO/IEC 17025 for analysis of amount-of-substance concentrations in volumetric solutions by DAkkS (Deutsche Akkreditierungsstelle - German National Accreditation Body). The accreditation certificate can be found at www.sigmaaldrich.com/ISO17025.
Packaging
Analysis Note
Amount-of-substance concentration 0.04975 - 0.05025 mol/L
Measurement uncertainty ± 0.00015 mol/L
Traceability NIST SRM
The concentration is determined by volumetric titration and refers to 20°C.
The amount-of-substance concentration of this volumetric solution is traceable to a primary standard reference material (SRM) from the National Institute of Standards and Technology, Gaithersburg, USA (NIST SRM 723 Tris(hydroxymethyl)aminomethane) by means of volumetric standard Tris(hydroxymethyl)aminomethane (article number 1.02408), certified reference material according to ISO 17034, analyzed by our accredited calibration laboratory of Merck KGaA, Darmstadt, Germany according to DIN EN ISO/IEC 17025. The uncertainty is expressed as expanded measurement uncertainty with a coverage factor k=2 covering a confidence level of 95%.
Note: The titer is a correction factor to correct for variations of the volumetric solution, the titration equipment, the temperature and other laboratory conditions. For correct titration results it is recommended to determine a titer with the laboratory specific equipment and under laboratory specific conditions directly after opening a new bottle and at regular time intervals.
Legal Information
1 of 1
Este artículo | |||
|---|---|---|---|
| description c(NaAsO2) = 0.05 mol/l (0,1 N), Titripur®, reag. USP | description traceable to SRM from NIST 1.00 mg/l As in HNO3 | description traceable to SRM from NIST H3AsO4 in HNO3 0.5 mol/l 1000 mg/l As Certipur® | description NIST®SRM® 3036 |
| reaction suitability reaction type: Redox Reactions | reaction suitability - | reaction suitability - | reaction suitability - |
| technique(s) titration: suitable | technique(s) photometry: suitable | technique(s) AAS: suitable | technique(s) - |
| product line Titripur® | product line - | product line Certipur® | product line - |
| pH 9.3 (20 °C in H2O) | pH 2.5 (20 °C in H2O) | pH 0.5 (20 °C in H2O) | pH - |
| quality Analyzed in our ISO 17025 accredited QC lab | quality - | quality - | quality - |
| storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C | storage temp. - |
signalword
Danger
hcodes
Hazard Classifications
Aquatic Chronic 3 - Carc. 1A
Clase de almacenamiento
6.1B - Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Listados normativos
Los listados normativos se proporcionan para los productos químicos principalmente. Para los productos no químicos sólo se puede proporcionar información limitada. Si no hay ninguna entrada, significa que ninguno de los componentes está en la lista. Es obligación del usuario garantizar el uso seguro y legal del producto.
1327-53-3
7784-46-5 + 1327-53-3
1327-53-3
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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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How long does this product keep at room temperature?
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The solution is stable for 3 years after production, provided that the bottle is originally closed and stored between 15°C and 25°C. Once the bottle is opened, the stability period cannot be precisely determined, as treatments and conditions vary between laboratories. Upon opening, the solution will absorb carbon dioxide from the environment, leading to a relatively fast change in concentration. It is recommended to perform a titer determination directly after opening the solution and then at regular intervals to monitor its stability. With the factor correction from the titer determination, the solution can be used until it is approximately +/- 10% from the nominal concentration.
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