Product Information
CAS number	6153-56-6
EC index number	607-006-00-8
EC number	205-634-3
Grade	ACS,ISO,Reag. Ph Eur
Hill Formula	C₂H₂O₄ * 2 H₂O
Chemical formula	(COOH)₂ * 2 H₂O
Molar Mass	126.07 g/mol
HS Code	2917 11 00
Structure formula Image

Applications
Application	Oxalic acid dihydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur. CAS 6153-56-6, EC Number 205-634-3, chemical formula (COOH)₂ * 2 H₂O.

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)	P280: Wear eye protection. P302 + P352: IF ON SKIN: Wash with plenty of soap and water. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P313: Get medical advice/ attention.
Signal Word	Danger
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly water endangering
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
Hazard Symbols	Harmful
Categories of danger	harmful
R Phrase	R 21/22 Harmful in contact with skin and if swallowed.
S Phrase	S 24/25 Avoid contact with skin and eyes.

Storage and Shipping Information
Storage	Store at +5°C to +30°C.

Transport Information
Declaration (railroad and road) ADR, RID	UN 3261 , 8, III
Declaration (transport by air) IATA-DGR	UN 3261 , 8, III
Declaration (transport by sea) IMDG-Code	UN 3261 , 8, III, Segregation Group: 1 (Acids)

Specifications
Assay (manganometric)	99.5 - 102.0 %
Insoluble matter	≤ 50 ppm
Chloride (Cl)	≤ 5 ppm
Sulphate (SO₄)	≤ 50 ppm
Total nitrogen (N)	≤ 10 ppm
Heavy metals (as Pb)	≤ 5 ppm
Ca (Calcium)	≤ 10 ppm
Fe (Iron)	≤ 2 ppm
Readily carbonisable substance	passes test
Residue on ignition (as sulphate)	≤ 100 ppm
Corresponds to ACS,ISO,Reag. Ph Eur

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MERCK 100495 Oxalic acid dihydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur. CAS 6153-56-6, EC Number 205-634-3 1 kg

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