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Key Documents

1.99054

Supelco

Buffer solution

(citric acid/sodium hydroxide/hydrogen chloride) colour: red, traceable to SRM from NIST and PTB pH 4.00 (25 °C), Certipur®

Sinonimo/i:

Buffer solution pH 4.0 (25 °C in H2O) (citric acid/sodium hydroxide/hydrogen chloride)

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About This Item

Codice UNSPSC:
12161703
NACRES:
NA.25

Grado

certified reference material

Livello qualitativo

Nome Commerciale

Certipur®

pH

4.0 (25 °C in H2O)

Densità

1.00 g/cm3 at 20 °C

applicazioni

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

Formato

mixture

Temperatura di conservazione

15-25°C

Descrizione generale

This red-colored citric acid/sodium hydroxide/hydrogen chloride buffer solution is gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. Its pH value of 4.00 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.

Applicazioni

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.

Caratteristiche e vantaggi

  • 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 a secure 500 mL plastic bottle and 4 L innovative and sustainable Titripac® PE/Aluminum 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
  • An uncertainty of +/- 0.02 in the pH value at 25°C

Note legali

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
Titripac is a registered trademark of Merck KGaA, Darmstadt, Germany

Raccomandato

N° Catalogo
Descrizione
Determinazione del prezzo

Codice della classe di stoccaggio

12 - Non Combustible Liquids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable


Certificati d'analisi (COA)

Cerca il Certificati d'analisi (COA) digitando il numero di lotto/batch corrispondente. I numeri di lotto o di batch sono stampati sull'etichetta dei prodotti dopo la parola ‘Lotto’ o ‘Batch’.

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