Skip to Content
Merck
CN
All Photos(1)

Documents

1.99002

Supelco

Buffer solution

(potassium dihydrogen phosphate/di-sodium hydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®

Synonym(s):

Potassium dihydrogen phosphate/di-sodium hydrogen phosphate buffer solution

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

UNSPSC Code:
12161706
NACRES:
NA.25

grade

certified reference material

Quality Level

300

product line

Certipur®

pH

7.0 (25 °C in H2O)

bp

109 °C/1013 hPa

mp

-5 °C

density

1.01 g/cm3 at 20 °C

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

format

mixture

storage temp.

15-25°C

Related Categories

General description

The potassium dihydrogen phosphate/disodium hydrogen phosphate certified buffer solution is gravimetrically prepared using high-quality reagents and water at a registered calibration laboratory. Its pH value of 7.00 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’s 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.

Application

The potassium dihydrogen phosphate/di-sodium hydrogen phosphate certified buffer solution is gravimetrically prepared using high-quality reagents and water at a registered calibration laboratory. Its pH value of 7.00 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′s pH value is strongly dependent on the temperature and therefore a constant temperature must be maintained during its use.

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 30 mL sachets
  • 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

recommended

Product No.
Description
Pricing

1.09407

Buffer solution, (potassium dihydrogen phosphate/disodium hydrogen phosphate)traceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®

1.09439

Buffer solution, (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®

1.09477

Buffer solution, (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour: green traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®

1.99057

Buffer solution, (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour:yellowtraceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®

1.99068

Buffer solution, di-sodium hydrogen phosphate/potassium dihydrogen phosphate, traceable to NIST, traceable to PTB, pH 6.86 (25 °C), Certipur®

Storage Class Code

12 - Non Combustible Liquids

WGK

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’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service