Merck 106277 1000 Sodium Arsenite Sol. 0.05Mol/L 1 LT.

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Description
Catalogue Number	106277

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Product Information
CAS number	7784-46-5
Grade	Reag. USP
HS Code	3822 90 00
Quality Level	MQ200

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Physicochemical Information
Density	1.005 g/m3 (20 °C)
pH value	9.3 (H₂O, 20 °C)

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Safety Information according to GHS
Hazard Pictogram(s)	\n
Hazard Statement(s)	H350: May cause cancer.\nH412: Harmful to aquatic life with long lasting effects.
Precautionary Statement(s)	P202: Do not handle until all safety precautions have been read and understood.\nP273: Avoid release to the environment.\nP280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection.\nP308 + P313: IF exposed or concerned: Get medical advice/ attention.\nP405: Store locked up.\nP501: Dispose of contents/ container to an approved waste disposal plant.
Signal Word	Danger
Storage class	6.1B Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
WGK	WGK 3 highly hazardous to water
Disposal	15\nHeavy metal-containing solutions and solids: container E. Stir Raney nickel (also: Urushibara nickel) in the form of an aqueous suspension into hydrochloric acid (Cat. No. 100312) until dissolved (container E). Neither Raney nickel itself nor any filter residues should be allowed to dry out, otherwise they will spontaneously ignite in air. In this context, heavy metal means any compound of antimony, arsenic, cadmium, chromium(VI), copper, lead, nickel and tin, as well as these subtances in metallic form, if they are classified as hazardous (acc. to AbfallverzeichnisV - Waste Catalogue Ordinance, Appendix 3). Other heavy metals should be collected separately.

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Safety Information
Categories of danger	carcinogenic, harmful, dangerous for the environment

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Storage and Shipping Information
Storage	Store at +15°C to +25°C.

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Transport Information
Declaration (railroad and road) ADR, RID	UN 1686 , 6.1, II
Declaration (transport by air) IATA-DGR	UN 1686 , 6.1, II
Declaration (transport by sea) IMDG-Code	UN 1686 , 6.1, II

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Specifications
Volumetric solution in accordance to the chapter reagents of the Pharmacopoeia (USP).
Form	liquid
Amount-of-substance concentration	0.04975 - 0.05025
Measurement uncertainty	+/- 0.00015
Traceability	NIST SRM
The amount-of-substance concentration of this volumetric solution is analyzed by our quality control laboratory of Merck KGaA, Darmstadt, Germany according to DIN EN ISO/IEC 17025.\nThe concentration is determined by volumetric titration and refers to 20°C.\nThe amount-of-substance concentration of this volumetric solution is determined with standardized iodine solution (article number 1.09099). The iodine solution is standardized by sodium thiosulfate solution (article number 1.09147) which has been standardized against volumetric standard potassium iodate (article number 1.02404).\nThis 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%.\nNote: 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.