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1.09460
Buffer solution
(boric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 8.00 (20°C) Certipur®
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1 L
$84.00
4 L
$188.00
About This Item
UNSPSC Code:
12161705
NACRES:
NA.25
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This Item | 1.09477 | 1.99003 | 1.09444 |
|---|---|---|---|
| Quality Level 300 | Quality Level 300 | Quality Level 300 | Quality Level 300 |
| density 1.00 g/cm3 at 20 °C | density 1.00 g/cm3 at 20 °C | density 1.00 g/cm3 at 20 °C | density 1.0 g/cm3 at 20 °C |
| storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C |
| pH 8.0 (20 °C in H2O) | pH 7.0 (20 °C in H2O) | pH 9.0 (25 °C in H2O) | pH 3.0 (25 °C in H2O) |
General description
The certified buffer solution (boric acid/sodium hydroxide/hydrogen chloride) is gravimetrically prepared using high-quality reagents following DIN EN ISO/IEC 17025. Its pH value of 8.00 at 20°C is measured following a 5-point calibration method, using a combined glass electrode. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. Its pH value is strongly dependent on the temperature and therefore a constant temperature must be maintained during its use.
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 buffer solution is meant to be used as a calibration standard in analytical procedures for pH measuring instruments or pH electrodes and as a control for measuring the pH of solutions.
Features and Benefits
- Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
- Traceable to secondary reference standard from NIST and primary certified reference standard from PTB
- Ready-to-use solution
- Available in a sealed plastic bottle and sustainable Titripac® packaging for a reduced waste generation
- Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective audit
- Product label follows the ISO Guide 31 and contains information about ordering number, article description, lot number, safety data, and expiry date
- Packaging material subjected to comprehensive stability studies as per ISO Guide 35
Legal Information
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
Titripac is a registered trademark of Merck KGaA, Darmstadt, Germany
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Description
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signalword
Danger
hcodes
Hazard Classifications
Repr. 1B
Storage Class
6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
wgk_germany
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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