L - Cysteine Manufacturer, Supplier, Exporter

Product information
Synonyms	a-Amino-ß-mercapto propionic acid
Hill Formula	C₃H₇NO₂S
HS Code	2930 90 13
EC number	200-158-2
Molar mass	121.16 g/mol
CAS number	52-90-4

Safety information according to GHS
Hazard Statement(s)	H302: Harmful if swallowed.
Signal Word	Warning
Hazard Pictogram(s)
RTECS	HA1600000
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.

L - Cysteine

Specifications
Assay (perchloric acid titration, calculated on dried substance)	≥ 99.0 %
Identity (IR-spectrum)	passes test
Appearance	White, crystalline powder or colorless crystals.
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)	+8.0° to +9.0°
UV-Absorption (280 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol/l)	≤ 0.5
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)	≤ 0.01 %
NH₄ (Ammonium)	≤ 0.01 %
Zn (Zinc)	≤ 0.0005 %
Foreign amino acids	≤ 0.5 %
Other ninhydrine positive substances	≤ 0.1 %
Loss on drying (105 °C; 3 h)	≤ 0.3 %

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Toxicological data
LD 50 oral	LD50 rat 1890 mg/kg