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di-Sodium tetraborate decahydrate

certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S)=9.18₀ (25°C) Certipur®

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Synonym(s):
di-Sodium tetraborate decahydrate, Borax, Sodium biborate decahydrate, Sodium borate decahydrate
Empirical Formula (Hill Notation):
B4Na2O7 · 10H2O
CAS Number:
Molecular Weight:
381.37
MDL number:
EC Index Number:
215-540-4

grade

certified reference material

Quality Level

Agency

complies with DIN 19266

vapor pressure

0.213 hPa ( 20 °C)

product line

Certipur®

potency

2660 mg/kg LD50, oral (Rat)
>2000 mg/kg LD50, skin (Rabbit)

pH

9.2 (20 °C, 47 g/L in H2O)

mp

75 °C (Elimination of water of crystallisation)

solubility

49.74 g/L

density

1.72 g/cm3 at 20 °C

bulk density

750 kg/m3

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

format

neat

storage temp.

15-25°C

InChI

1S/B4O7.2Na.10H2O/c5-1-9-3(7)11-4(8)10-2-6;;;;;;;;;;;;/h;;;10*1H2/q-2;2*+1;;;;;;;;;;

InChI key

OJPFLODMGUZMKD-UHFFFAOYSA-N

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This Item
1.06308S964031457
Sodium tetraborate decahydrate puriss. p.a., ACS reagent, reag. ISO, buffer substance, ≥99.5%

Sigma-Aldrich

31457

Sodium tetraborate decahydrate

Essential Grade
product line

Certipur®

product line

-

product line

-

product line

-

mp

75 °C (Elimination of water of crystallisation)

mp

75 °C (Elimination of water of crystallisation)

mp

-

mp

-

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

application(s)

-

application(s)

-

application(s)

-

format

neat

format

-

format

-

format

-

agency

complies with DIN 19266

agency

reag. ISO, reag. Ph. Eur.

agency

suitable for SM 4500 - NH3

agency

reag. ISO

General description

Certipur® certified secondary standard reference buffers are used to precisely calibrate and monitor pH measurement instruments and buffer solutions. They are quality controlled and qualified in our ISO/IEC 17025 and 17034 accredited calibration laboratories against certified primary standard reference materials (SRM) in compliance with DIN 19266, IUPAC, NIST, Ph. Eur and USP. Certipur® reference materials offer maximum accuracy, reliability and convenience and help avoid costly repeat analyses.
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

di-Sodium tetraborate decahydrate [pH(S)=9.180 (25 °C)] is a certified secondary standard reference buffer used as a calibration buffer standard for pH instruments or pH electrodes.

Features and Benefits

  • The product is delivered with a comprehensive, batch-specific Certificate of Analysis showing the relevant data for the quality management system.

The pH value of this Certipur® buffer solution is measured using differential potentiometry with two platinum hydrogen electrodes against NIST & PTB primary SRMs [pH(S)=9.180 (25 °C)].
  • It is a Certified Reference Material (CRM) offered in neat format.
  • Intended for extremely precise calibration, qualification and monitoring of pH instruments and for testing other buffer solutions.

Analysis Note

pH-value (25 °C): 9.180 - 9.186
Identity: passes test

Legal Information

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

Pictograms

Exclamation markHealth hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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