Skip to Content
MilliporeSigma

1.99019

Supelco

Buffer solution

(di-sodium tetraborate)tracable to SRM from NIST and PTB pH 9.18 (25°C) Certipur®

Synonym(s):

Buffer solution pH 9.2 (25 °C in H2O)(di-sodium tetraborate)

Sign Into View Organizational & Contract Pricing

Select a Size

25 G
$33.70
100 G
$91.00

$33.70


Only 0 left in stock

Request a Bulk Order

Select a Size

Change View
25 G
$33.70
100 G
$91.00

About This Item

UNSPSC Code:
12161705
NACRES:
NA.25

$33.70


Only 0 left in stock

Request a Bulk Order

grade

certified reference material

Quality Level

product line

Certipur®

pH

9.2 (25 °C in H2O)

bp

100 °C/1013 hPa

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

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
PHR1125G639276523
storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

-

storage temp.

-

mp

185 °C (dec.) (lit.)

mp

185 °C (dec.) (lit.)

mp

185 °C (dec.) (lit.)

mp

185 °C (dec.) (lit.)

solubility

100 g/L

solubility

-

solubility

H2O: 10 mL/vial, clear to slightly hazy

solubility

-

Quality Level

200

Quality Level

300

Quality Level

200

Quality Level

300

potency

7500 mg/kg LD50, oral (Rat)

potency

-

potency

-

potency

-

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 9.18 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

It 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
  • 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

Not finding the right product?  

Try our Product Selector Tool.

Storage Class

12 - Non Combustible Liquids

wgk_germany

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’.

Select a Product Number

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