LC3954 L-Methionine

for biochemistry

Safety information
RTECS	PD0457000
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.

Toxicological data
LD 50 oral	LD50 rat 36000 mg/kg

Specifications
Assay (perchloric acid titration, calculated on dried substance)	≥ 99 %
Identity (IR-spectrum)	passes test
Appearance	white to almost white, shiny powder
Appearance of solution (0.5 mol/l, hydrochloric acid 1 mol/l)	clear and colorless
Spec. rotation (α 20/D, 50 g/l, hydrochloric acid 1 mol/l, calc. on dried substance)	+22.5 ° to +23.5 °
UV-Absorption – 260 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol	≤ 0.50
– 280 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol/l	≤ 0.20
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)	≤ 0.3 %