Merck 101542 L-Arginine For Biochemistry. Cas 74-79-3, pH 11.4 (100 G/L, H₂O, 20 °C).

Merck 101542

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
Melting Point	238 °C (decomposition)
pH value	11.4 (100 g/l, H₂O, 20 °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 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
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 %
Identity (IR-spectrum)	passes test
Appearance	white to almost white, fine-grain powder or colorless crystals
Appearance of solution (0.5 mol/l, water)	clear and colorless
Spec. rotation (α 20/D, 50 g/l, hydrochloric acid 1 mol/l, calc. on dried substance)	+25.0 to +26.5
UV-Absorption (260 nm; 0.5 mol/l; 1 cm; water)	≤ 0.35
UV-Absorption (280 nm; 0.5 mol/l; 1 cm; water)	≤ 0.15
Chloride (Cl)	≤ 0.02 %
Sulfate (SO₄)	≤ 0.01 %
Heavy metals (as Pb)	≤ 0.001 %
As (Arsenic)	≤ 0.0005 %
Ca (Calcium)	≤ 0.001 %
Co (Cobalt)	≤ 0.0005 %
Fe (Iron)	≤ 0.0005 %
K (Potassium)	≤ 0.0005 %
Mg (Magnesium)	≤ 0.0005 %
Na (Sodium)	≤ 0.005 %
NH₄ (Ammonium)	≤ 0.01 %
Zn (Zinc)	≤ 0.0005 %
Foreign amino acids	≤ 0.3 %
Other ninhydrine positive substances	≤ 0.1 %
Loss on drying (105 °C; 3 h)	≤ 0.5 %

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