Description

Catalogue Number

109142

Product Information

CAS number

1310-73-2

Grade

Reag. USP

HS Code

2815 12 00

Quality Level

MQ200

Physicochemical Information

Density

1.00 g/cm3 (20 °C)

pH value

12.5 (H₂O, 20 °C)

Safety Information according to GHS

Storage class

10 - 13 Other liquids and solids

WGK

NWG not water endangering

Disposal

28

Aqueous solutions: Container D.

Storage and Shipping Information

Storage

Store at +15°C to +25°C.

Transport Information

Declaration (railroad and road) ADR, RID

Kein Gefahrgut

Declaration (transport by air) IATA-DGR

No Dangerous Good

Declaration (transport by sea) IMDG-Code

No Dangerous Good

Specifications

Form

liquid

Amount-of-substance concentration

0.01990 - 0.02010

Measurement uncertainty

+ / - 0.00006

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 determined with standardized hydrochloric acid solution (article number 1.09060). The hydrochloric acid solution is standardized and traceable to a primary standard reference material (SRM) from the National Institute of Standards and Technology, Gaithersburg, USA (NIST SRM 723 Tris(hydroxymethyl)aminomethane) by means of volumetric standard Tris(hydroxymethyl)aminomethane (article number 1.02408), 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.