Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

1.99022

Supelco

Buffer Solution

(di-sodium hydrogen phosphate/sodium hydroxide) traceable to SRM from NIST und PTB pH 12.00 (25°C) Certipur®

Synonym(s):

Buffer solution pH 12.0 (25 °C in H2O) (di-sodium hydrogen phosphate/sodium hydroxide)

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

About This Item

UNSPSC Code:
12161705
NACRES:
NA.25

grade

certified reference material

Quality Level

300

product line

Certipur®

pH

12.0 (25 °C in H2O)

density

1.00 g/cm3 at 20 °C

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

format

mixture

storage temp.

15-25°C

General description

The di-sodium hydrogen phosphate/sodium hydroxide buffer solution is gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. Its pH value of 12.00 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 strongly depends 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 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 30 mL sachets as a ready-to-use solution and in 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

Legal Information

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

Pictograms

Corrosion
GHS05

Signal Word

Danger

Hazard Statements

H314

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1

Storage Class Code

8B - Non-combustible, corrosive hazardous materials

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