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Description
Catalogue Number	109147
Replaces	SX0821; SX0821-3; SX0821-8

Product Information
Grade	Reag. Ph Eur,Reag. USP
HS Code	2832 30 00
Quality Level	MQ200

Physicochemical Information
Density	1.011 g/cm3 (20 °C)
pH value	9 – 10 (H₂O, 20 °C)

Safety Information according to GHS
Storage class	10 – 13 Other liquids and solids
WGK	NWG not water endangering

Storage and Shipping Information
Storage	Store at +2°C to +30°C.

Specifications
Form	liquid
Amount-of-substance concentration	0.0995 – 0.1005
Measurement uncertainty	+/- 0.0003
Traceability	NIST SRM
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. 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.

Merck 109147 1000 Sodium Thiosulfate Solution 1 LT.

Merck 109147 1000 Sodium Thiosulfate Solution 1 LT.

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