1.99091
Buffer solution
traceable to NIST SRM, traceable to PTB, pH 9.2 (25 °C in H2O), Certipur®
Synonyme(s) :
di-sodium tetraborate
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About This Item
Produits recommandés
Agence
traceable to NIST SRM
traceable to PTB
Niveau de qualité
Gamme de produits
Certipur®
pH
9.2 (25 °C in H2O)
Point d'ébullition
100 °C/1013 hPa
Densité
1.00 g/cm3 at 20 °C
Température de stockage
15-25°C
Description générale
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.
Caractéristiques et avantages
- 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
Informations légales
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
Code de la classe de stockage
12 - Non Combustible Liquids
Classe de danger pour l'eau (WGK)
nwg
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Certificats d'analyse (COA)
Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".
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