Merck 112422 0100 N-Acetyl-L-Cysteine For Biochemistry 100 GR.

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Description
Catalogue Number	112422
Synonyms	2-Acetamido-3-mercaptopropionic acid

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Product Information
CAS number	616-91-1
EC number	210-498-3
Hill Formula	C₅H₉NO₃S
Molar Mass	163.20 g/mol
HS Code	2930 90 16
Structure formula Image
Quality Level	MQ100

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Applications
Application	N-Acetyl-L-cysteine for biochemistry. CAS 616-91-1, pH 1.5 - 2.5 (100 g/l, H₂O, 20 °C).

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Physicochemical Information
Density	1.48 g/cm3 (20 °C)
Melting Point	110.4 °C
pH value	1.5 - 2.5 (100 g/l, H₂O, 20 °C)
Vapor pressure	<0.1 hPa (20 °C)
Bulk density	730 kg/m3
Solubility	179.5 g/l

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Toxicological Information
LD 50 oral	LD50 Rat 5050 mg/kg

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Safety Information according to GHS
Hazard Pictogram(s)	\n
Hazard Statement(s)	H319: Causes serious eye irritation.
Precautionary Statement(s)	P264: Wash skin thoroughly after handling.\nP280: Wear eye protection/ face protection.\nP305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.\nP337 + P313: If eye irritation persists: Get medical advice/ attention.
Signal Word	Warning
Storage class	10 - 13 Other liquids and solids
WGK	WGK 2 obviously hazardous to water
Disposal	3\nRelatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

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

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Specifications
Assay (iodometric)	≥ 99.0 %
Identity (IR-spectrum)	passes test
Appearance	white to almost white, crystalline powder or colorless crystals
Appearance of solution (1 mol/l, water)	clear and colorless
Spec. rotation (α 20/D, 50 g/l, buffer pH 7.0)	+21.0 to +27.0
Heavy metals (as Pb)	≤ 0.001 %
NH₄ (Ammonium)	≤ 0.01 %
L-cysteine (HPLC)	≤ 0.02 %
Other ninhydrine positive substances	≤ 0.1 %