The molar concentration of di-sodium tetraborate in this buffer is proprietary. The certified pH value is available in the Certificate of Analysis.
1.99091
Buffer solution
traceable to NIST SRM, traceable to PTB, pH 9.18 (25 °C in H2O), Certipur®
Synonym(e):
di-sodium tetraborate
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| Packungsgröße | SKU | Verfügbarkeit | Preis |
|---|---|---|---|
| 500 mL | Warenkorb auf Verfügbarkeit prüfen | € 35,60 |
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NACRES:
NA.25
UNSPSC Code:
41116107
Technischer Dienst
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Unterstützung erhaltenQuality Level
agency
traceable to NIST SRM, traceable to PTB
product line
Certipur®
pH
9.18 (25 °C in H2O)
bp
100 °C/1013 hPa
density
1.00 g/cm3 at 20 °C
storage temp.
15-25°C
General description
The di-sodium tetraborate buffer solution is gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. Its pH value of 9.20 at 25°C is measured using a combined glass electrode following a 5-point calibration method. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The buffer pH is temperature dependent 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 is used as a standard to calibrate pH measuring instruments or pH electrodes and as a control to measure the pH of other 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
- Available in secure 500 mL plastic bottle to protect against contamination
- 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
Legal Information
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
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Dieser Artikel | |||
|---|---|---|---|
| product line Certipur® | product line Certipur® | product line Certipur® | product line Certipur® |
| agency traceable to NIST SRM, traceable to PTB | agency - | agency - | agency - |
| bp 100 °C/1013 hPa | bp 100 °C/1013 hPa | bp - | bp - |
| pH 9.18 (25 °C in H2O) | pH 9.2 (25 °C in H2O) | pH 4.0 (25 °C in H2O) | pH 9.0 (20 °C in H2O) |
| Quality Level 300 | Quality Level 300 | Quality Level 300 | Quality Level 300 |
| storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C |
Lagerklasse
12 - Non Combustible Liquids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
Zulassungslistungen
Zulassungslistungen werden hauptsächlich für chemische Produkte erstellt. Für nicht-chemische Produkte können hier nur begrenzte Angaben gemacht werden. Kein Eintrag bedeutet, dass keine der Komponenten gelistet ist. Es liegt in der Verantwortung des Benutzers, die sichere und legale Verwendung des Produkts zu gewährleisten.
1330-43-4
CAS No.
Analysenzertifikate (COA)
Suchen Sie nach Analysenzertifikate (COA), indem Sie die Lot-/Chargennummer des Produkts eingeben. Lot- und Chargennummern sind auf dem Produktetikett hinter den Wörtern ‘Lot’ oder ‘Batch’ (Lot oder Charge) zu finden.
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 1990910500 | 04027269966539 |
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What is the concentration of molar concentration of di-sodium tetraborate in the buffer?
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