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Physicochemical Information
Density	2.280 g/cm3 (20 °C)
Melting Point	335 °C
pH value	1.0 – 2.0 (25.5 g/l, H₂O, 25 °C)
Bulk density	830 kg/m3

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H314: Causes severe skin burns and eye damage. H331: Toxic if inhaled.
Precautionary Statement(s)	P260: Do not breathe dust. P271: Use only outdoors or in a well-ventilated area. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection. P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water. P304 + P340 + P310: IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor. P305 + 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	6.1B Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
WGK	WGK 3 highly hazardous to water
Disposal	14 Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).

Storage and Shipping Information
Storage	NoTempLimit

Transport Information
Declaration (railroad and road) ADR, RID	UN 2923 , 8 (6.1), I
Declaration (transport by air) IATA-DGR	UN 2923 , 8 (6.1), I
Declaration (transport by sea) IMDG-Code	UN 2923 , 8 (6.1), I, Segregation Group: 1 (Acids)

Specifications
Assay (acidimetric, as K₂S₂O₇)	97.5 – 100.0 %
Acidity (as H₂SO₄)	37.5 – 38.6 %
Insoluble and by ammoniumhydroxide precipitated matter	≤ 0.01 %
Chloride (Cl)	≤ 0.0005 %
Phosphate (PO₄)	≤ 0.001 %
Total nitrogen (N)	≤ 0.002 %
Heavy metals (as Pb)	≤ 0.001 %
Al (Aluminium)	≤ 0.001 %
As (Arsenic)	≤ 0.0005 %
Ca (Calcium)	≤ 0.002 %
Fe (Iron)	≤ 0.0005 %
Mg (Magnesium)	≤ 0.0005 %
Na (Sodium)	≤ 0.01 %
Water (H₂O)	≤ 2.5 %
Conforms ACS

Merck 105107 1000 Potassıum Disulfate Gr For Analysis Emsure 1 KG.