N-Acetyl-L-Cysteine NAC

N-Acetyl-L-cysteine

616-91-1

C5H9NO3S

Molecular Weight:163.19

163.19

DTXSID5020021

C200

ATC Code:R05CB01|R - Respiratory system|S - Sensory organs|V - Various

Oral-rat LD50:5050 mg/kg; Oral-Mouse LD50:7888 mg/kg

Decomposes smoke in humid air; burning releases n oxide and sulfur oxide smoke

-35.1 ºC (c=2,H2O)

SLIGHT ACETIC ODOR

CHARACTERISTIC SOUR TASTE

2 TO 2.75 (1 IN 100 ML)

9.52(at 25 °C)

Henry's Law constant = 1.7X10-13 atm-cu m/mole at 25 °C /Estimated/

9.52 (at 25 °C)|pKa= 3.24 (carboxylic acid moiety)|pKa = 9.52 (SH group)

140.9 Ų [M+Na]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|140.9 Ų [M+Na]+

It is stable in ordinary light, nonhygroscopic (oxidizes in moist air), and stable at temperatures up to 120 °C|Hydroxyl radical reaction rate constant = 5.5X10-11 cu cm/molec-sec at 25 °C /Estimated/