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
Roztwór buforowy
traceable to NIST SRM, traceable to PTB, pH 9.18 (25 °C in H2O), Certipur®
Synonim(y):
tetraboran dwusodowy
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| Do Państwa/SKU | Dostępność | Cena netto |
|---|---|---|
500 mL | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 164,00 zł |
Informacje o tej pozycji
NACRES:
NA.25
UNSPSC Code:
41116107
164,00 zł
Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności
Pomoc techniczna
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Pozwól nam pomócQuality Segment
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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Ta pozycja | |||
|---|---|---|---|
| description traceable to NIST SRM, traceable to PTB, pH 9.18 (25 °C in H2O), Certipur® | description (di-sodium tetraborate)tracable to SRM from NIST and PTB pH 9.18 (25°C) Certipur® | description (citric acid/sodium hydroxide/hydrogen chloride) traceable to SRM from NIST and PTB pH 4.00 (25°C) Certipur® | description (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 9.00 (20°C) Certipur® |
| product line Certipur® | product line Certipur® | product line Certipur® | product line Certipur® |
| agency traceable to NIST SRM, traceable to PTB | agency - | agency - | agency - |
| density 1.00 g/cm3 at 20 °C | density 1.00 g/cm3 at 20 °C | density 1.01 g/cm3 at 20 °C | density 1.0 g/cm3 at 20 °C |
| 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) |
| storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C | storage temp. 15-25°C |
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Klasa składowania
12 - Non Combustible Liquids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
Wykazy regulacyjne
Wykazy regulacyjne dotyczą głównie produktów chemicznych. Można w nich podawać ograniczoną liczbę informacji na temat produktów niechemicznych. Brak wpisu oznacza, że żaden ze składników nie znajduje się w wykazie. Użytkownik odpowiada za zagwarantowanie bezpiecznego i zgodnego z prawem stosowania produktu.
1330-43-4
CAS No.
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