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Physicochemical Information
Boiling point	149 – 160 °C (1013 hPa) (decomposition)
Density	1.65 g/cm3 (20 °C)
Flash point	157 °C (decomposition)
Melting Point	98 – 100 °C
pH value	1.5 (10 g/l, H₂O)
Vapor pressure	0.000312 hPa (25 °C)
Bulk density	813 kg/m3
Solubility	>100 g/l

Toxicological Information
LD 50 oral	LD50 Rat 375 mg/kg

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H302 + H312: Harmful if swallowed or in contact with skin. H318: Causes serious eye damage.
Precautionary Statement(s)	P264: Wash skin thoroughly after handling. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection. P301 + P312: IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. P302 + P352 + P312: IF ON SKIN: Wash with plenty of water. Call a POISON CENTER/doctor if you feel unwell. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P362 + P364: Take off contaminated clothing and wash it before reuse.
Signal Word	Danger
Storage class	10 – 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Safety Information
Categories of danger	harmful

Storage and Shipping Information
Storage	Store at +2°C to +30°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 (manganometric)	99.5 – 102.0 %
Insoluble matter	≤ 50 ppm
Chloride (Cl)	≤ 5 ppm
Sulfate (SO₄)	≤ 50 ppm
Total nitrogen (N)	≤ 10 ppm
Heavy metals (as Pb)	≤ 5 ppm
Heavy metals (ACS)	≤ 5 ppm
Ca (Calcium)	≤ 10 ppm
Fe (Iron)	≤ 2 ppm
Readily carbonisable substance	passes test
Residue on ignition (as sulfate)	≤ 100 ppm
Corresponds to ACS,ISO,Reag. Ph Eur

Merck 100495 0500 Oxalic Acid Dihydrate Gr For Analysis Acs,iso 500 GR.