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Description
Catalogue Number	101542
Synonyms	Arg

Applications
Application	L-Arginine for biochemistry. CAS 74-79-3, pH 11.4 (100 g/l, H₂O, 20 °C).

Physicochemical Information
Density	1.1 g/cm3
Melting Point	223 – 224 °C (decomposition)
pH value	11.4 (100 g/l, H₂O, 20 °C)
Vapor pressure	<0.1 hPa (25 °C)
Bulk density	640 kg/m3
Solubility	148.7 g/l

Toxicological Information
LD 50 oral	LD50 Rat > 5110 mg/kg

Safety Information according to GHS
RTECS	CF1934200
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	irritant

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

Specifications
Assay (perchloric acid titration, calculated on dried substance)	99.0 – 101.0 %
Identity (IR-spectrum)	passes test
Appearance	white to almost white, crystalline powder or colorless crystals
Appearance of solution (50 g/l; water)	clear and not more intense in color than reference solution BY₆
Spec. rotation (α 20/D, 80 g/l, hydrochloric acid 250 g/l, calc. on dried substance)	+25.5 to +28.5
Chloride (Cl)	≤ 200 ppm
Sulfate (SO₄)	≤ 200 ppm
Heavy metals (as Pb)	≤ 10 ppm
As (Arsenic)	≤ 5 ppm
Ca (Calcium)	≤ 10 ppm
Co (Cobalt)	≤ 5 ppm
Fe (Iron)	≤ 5 ppm
K (Potassium)	≤ 5 ppm
Mg (Magnesium)	≤ 5 ppm
Na (Sodium)	≤ 50 ppm
Zn (Zinc)	≤ 5 ppm
Ninhydrin-positive substances (LC) (any ninhydrin-positive impurity)	≤ 0.2 %
Ninhydrin-positive substances (LC) (ammonium (570 nm))	≤ 0.02 %
Ninhydrin-positive substances (LC) (total impurities)	≤ 0.5 %
Loss on drying (105 °C; 3 h)	≤ 0.30 %

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