Merck 109163 1000 Wijs Solution For Determination Of The iodine Number C(icl) = 0,1 Mol/L 1 LT.

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Description
Catalogue Number	109163
Synonyms	Iodine solution acc. to Wijs

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Product Information
HS Code	3822 19 00
Quality Level	MQ200

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Physicochemical Information
Density	1.06 g/cm3 (20 °C)
Flash point	40 °C
pH value	<1 (H₂O, 20 °C)

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Safety Information according to GHS
Hazard Pictogram(s)	\n\n
Hazard Statement(s)	H226: Flammable liquid and vapour.\nH314: Causes severe skin burns and eye damage.
Precautionary Statement(s)	P210: Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.\nP233: Keep container tightly closed.\nP240: Ground and bond container and receiving equipment.\nP280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection.\nP303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water.\nP305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal Word	Danger
Storage class	3 Flammable liquids
WGK	WGK 2 obviously hazardous to water
Disposal	12\nInorganic acids and anhydrides thereof should first be diluted or hydrolyzed by stirring carefully into ice water and then neutralized (protective gloves, fume cupboard!) with sodium hydroxide solution (Cat. No. 105587). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535). Fuming sulfuric acid should be carefully stirred dropwise into 40 % sulfuric acid (Cat. No. 109286). Ensure that plenty of ice is available for cooling! When sufficiently cool, treat the highly concentrated sulfuric acid as described above. Analogous to this procedure, other anhydrides can be converted into their corresponding acids. Acid gases (e.g. hydrogen halide, chlorine, phosgene, sulfur dioxide) can be introduced into dilute sodium hydroxide solution and after neutralization disposed of in container D.

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Safety Information
Categories of danger	flammable, corrosive

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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 2789 , 8 (3), II
Declaration (transport by air) IATA-DGR	UN 2789 , 8 (3), II
Declaration (transport by sea) IMDG-Code	UN 2789 , 8 (3), II, Segregation Group: 1 (Acids)

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Specifications
Form	liquid
Amount-of-substance concentration	0.0994 - 0.1006
Measurement uncertainty	+/- 0.0004
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 sodium thiosulfate solution (article number 1.09147). The sodium thiosulfate solution is standardized and 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.