Merck 106657 1000 Sodium Sulfite Anhydrous Gr For Analysis Acs,Reag. Ph Eur 1 KG.

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Description
Catalogue Number	106657

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Product Information
CAS number	7757-83-7
EC number	231-821-4
Grade	Reag. Ph Eur
Hill Formula	Na₂O₃S
Chemical formula	Na₂SO₃
Molar Mass	126.04 g/mol
HS Code	2832 10 10
Quality Level	MQ300

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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

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Toxicological Information
LD 50 oral	LD50 Rat 2610 mg/kg

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Safety Information according to GHS
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	6\nSulfides 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.

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

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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

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Specifications
Assay (iodometric)	97.0 - 100.5 %
Identity	passes test
Appearance of solution	passes test
Insoluble matter	≤ 0.005 %
Free acid	passes test
Titrable free base	≤ 0.03 meq/g
Chloride (Cl)	≤ 0.02 %
Thiosulfate (S₂O₃)	≤ 0.1 %
Heavy metals (as Pb)	≤ 0.0005 %
As (Arsenic)	≤ 0.0001 %
Cu (Copper)	≤ 0.0005 %
Fe (Iron)	≤ 0.001 %
Pb (Lead)	≤ 0.0005 %
Se (Selenium)	≤ 0.0004 %
Zn (Zinc)	≤ 0.001 %