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Description
Catalogue Number	106652

Physicochemical Information
Density	2.630 g/cm3
Melting Point	>500 °C (decomposition)
pH value	9.0 – 10.5 (126 g/l, H₂O, 25 °C)
Bulk density	1480 kg/m3
Solubility	220 g/l

Toxicological Information
LD 50 oral	LD50 Rat 2610 mg/kg

Safety Information according to GHS
Storage class	10 – 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	6 Sulfides and sulfites as well as other reducing substances, inorganic cyanides and isonitriles: Stir into sodium hypochlorite solution (Cat. No. 105614) and, if necessary, leave to react for several days. Caution: some substances may show a violent reaction! Draw off any toxic or flammable gases that may be formed. Excess oxidant should be neutralized with sodium thiosulfate (Cat. No. 106513). Container D or E.

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
Assay (iodometric)	95.0 – 100.5 %
Assay (SO₂)	≥ 48.0 %
Identity	passes test
Appearance of solution	passes test
Thiosulfate (S₂O₃)	≤ 0.05 %
Heavy metals (as Pb)	≤ 0.0005 %
As (Arsenic)	≤ 0.0002 %
Hg (Mercury)	≤ 0.0001 %
Fe (Iron)	≤ 0.0005 %
Pb (Lead)	≤ 0.0002 %
Se (Selenium)	≤ 0.00025 %
Zn (Zinc)	≤ 0.0025 %
Residual solvents (Ph Eur/USP/ICH)	excluded by the manufacturing process
Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*). Conforms to the purity criteria on food additives according to the current European Commission Regulation.
Conforms to Ph Eur, BP, NF, E221

Merck 106652 1000 Sodium Sulfite Emprove 1 KG.