An impurity analysis is not performed on this product.
1.09439
Buffer solution
(di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®
Synonym(s):
Buffer solution pH 7.00 (20°C) (di-sodium hydrogen phosphate/potassium dihydrogen phosphate)
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1 L
₪330.00
4 L
₪1,068.00
10 L
₪1,578.00
About This Item
UNSPSC Code:
12161706
NACRES:
NA.25
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grade
certified reference material
Quality Level
product line
Certipur®
pH
7.0 (20 °C in H2O)
bp
109 °C/1013 hPa
mp
-5 °C
density
1.01 g/cm3 at 20 °C
application(s)
environmental
food and beverages
general analytical
industrial qc
pharmaceutical
format
mixture
storage temp.
15-25°C
1 of 4
This Item | 1.09432 | 1.09435 | 1.09437 |
|---|---|---|---|
| format mixture | format mixture | format mixture | format mixture |
| mp -5 °C | mp - | mp - | mp - |
| bp 109 °C/1013 hPa | bp - | bp - | bp - |
| product line Certipur® | product line Certipur® | product line Certipur® | product line Certipur® |
| grade certified reference material | grade certified reference material | grade certified reference material | grade certified reference material |
| application(s) environmental | application(s) environmental | application(s) environmental | application(s) environmental |
General description
The buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate) is gravimetrically prepared using high-quality salts in high-purity water. It is quality controlled and qualified in an ISO/IEC 17025 accredited calibration lab. Its pH value of 7.00 at 20°C is qualified following a 5-point calibration method, using a combined glass electrode, in accordance with DIN 19268, against reference buffer solutions following DIN 19266.
Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.
Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.
Application
The di-sodium hydrogen phosphate/potassium dihydrogen phosphate buffer solution finds applications in analytical procedures for the calibration, qualification, and monitoring of pH measuring instruments.
Features and Benefits
- Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
- Traceable to SRMs from NIST and primary certified reference standards from PTB
- Ready-to-use solution available in a sealed bottle and the innovative Titripac® packaging for positive environmental impact due to reduced waste generation
- Long-lasting with a shelf life of 3 years
- Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective audit
Legal Information
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
Titripac is a registered trademark of Merck KGaA, Darmstadt, Germany
related product
Product No.
Description
Pricing
Storage Class Code
12 - Non Combustible Liquids
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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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Do you have any information on the presence of any minor impurities in this buffer solution (product ref 1094391000)?
1 answer-
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Is this product a stock solution or could it be diluted?
1 answer-
This product is supplied ready to use for the calibration, qualification, and monitoring of pH measuring instruments. The pH value is certified for the solution as is, and this product is not intended to be diluted.
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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.pdfHelpful?
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Hello, Is there information on the proportions and concentrations of the solutions in this mixture available?
1 answer-
The exact concentrations and ratio of disodium hydrogen phosphate and potassium dihydrogen phosphate used to prepare this buffer solution are proprietary information and cannot be disclosed.
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Hello, I bought the buffer solution CRM. However, I can`t know M (mole concentration). Could you send me the information of mole concentration of this product?
1 answer-
This product is intended for use as a pH 7.00 reference standard. The final concentration of each component is not evaluated. The initial component concentrations are listed below. However, the addition of Sodium Hydroxide and Hydrochloric Acid for pH adjustment is not factored in to these values. This is an approximation, only.
Potassium Phosphate monobasic - 3.52 g/L
Sodium Phosphate Dibasic dihydrate - 7.27 g/LHelpful?
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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
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