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1.09147

Supelco

Sodium thiosulfate solution

c(Na2S2O3 5 H2O) = 0.1 mol/l (0.1 N), Titripur®, reag. Ph. Eur., reag. USP

Synonym(s):
Antichlor

Agency/Method

reag. Ph. Eur.
reag. USP

Quality Level

product line

Titripur®

form

liquid

quality

Analyzed in our ISO 17025 accredited QC lab

reaction suitability

reaction type: Redox Reactions

concentration

0.1 M

application(s)

titration: suitable

pH

9-10 (20 °C in H2O)

density

1.01 g/cm3 at 20 °C

storage temp.

15-25°C

Related Categories

Features and Benefits

Accreditation:
This volumetric solution is analyzed by our calibration laboratory D-K-15185-01-00 which is accredited according to DIN EN ISO/IEC 17025 for analysis of amount-of-substance concentrations in volumetric solutions by DAkkS (Deutsche Akkreditierungsstelle - German National Accreditation Body). The accreditation certificate can be found at www.sigmaaldrich.com/ISO17025.

Packaging

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals

Titripac® packaging - all SKU-pack size numbers ending "4000, 4003, 9010, 9013" - more information on www.sigmaaldrich.com/Titripac

Linkage

Replaces: SX0821; SX0821-3; SX0821-8

Analysis Note

Form liquid
Amount-of-substance concentration 0.0995 - 0.1005 mol/L
Measurement uncertainty ± 0.0003 mol/L
Traceability NIST SRM

The concentration is determined by volumetric titration and refers to 20°C.
The amount-of-substance concentration of this volumetric solution is traceable to a primary standard reference material (SRM) from the National Institute of Standards and Technology, Gaithersburg, USA (NIST SRM 136 potassium dichromate) by means of volumetric standard potassium iodate (article number 1.02404), certified reference material according to ISO 17034, analyzed by our accredited calibration laboratory of Merck KGaA, Darmstadt, Germany according to DIN EN ISO/IEC 17025. The uncertainty is expressed as expanded measurement uncertainty with a coverage factor k=2 covering a confidence level of 95%.

Note: The titer is a correction factor to correct for variations of the volumetric solution, the titration equipment, the temperature and other laboratory conditions. For correct titration results it is recommended to determine a titer with the laboratory specific equipment and under laboratory specific conditions directly after opening a new bottle and at regular time intervals.

Legal Information

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

Storage Class Code

12 - Non Combustible Liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Articles

Titration 4.0

SmartChemicals enable wireless transfer of CoA data stored on an RFID tag on the consumable bottle to the titrator, reducing effort and chance for human error. Crucial data required for the application is transmitted safely, reliably and intelligently to the instrument.

Protocols

Analytical Method: Analytical Quality Assurance, Standard for Sulfide

Analytical Method: Analytical Quality Assurance, Standard for Sulfide

Analytical Method: Analytical Quality Assurance, Standard for Monochloramine

Preparation of a standard solution for Monochloramine.

Analytical Method: Analytical Quality Assurance, Standard for Formaldehyde

Preparation of a standard solution for Formaldehyde

How to Prepare a Standard for Free Chlorine Analysis

AQA Standard for free chlorine - Preparation of a standard solution for free chlorine

Related Content

Titration & Karl Fischer Titration

Titration is an analytical method to determine an unknown concentration using a solution of known concentration. Karl Fischer titration is a specific and widely used titration method to determine the water content of raw materials and finished products.

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

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