ChemSpider 2D Image | S-Acetyl-L-cysteine | C5H9NO3S

S-Acetyl-L-cysteine

  • Molecular FormulaC5H9NO3S
  • Average mass163.195 Da
  • Monoisotopic mass163.030319 Da
  • ChemSpider ID8305638

  • defined stereocentres - 1 of 1 defined stereocentres

More details:

Validated by Experts, Validated by Users, Non-Validated, Removed by Users

L-Cysteine, S-acetyl- [ACD/Index Name]
S-Acetyl-L-cystein [German] [ACD/IUPAC Name]
S-Acetyl-L-cysteine [ACD/IUPAC Name]
S-Acétyl-L-cystéine [French] [ACD/IUPAC Name]
(R)-3-(Acetylthio)-2-aminopropanoic acid
(R)-RETRO-THIORPHAN
15312-11-5 [RN]
S-Acetyl-Cysteine

Validated by Experts, Validated by Users, Non-Validated, Removed by Users

RRT [DBID]

Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, version: 14.00

Density: 1.4±0.1 g/cm3
Boiling Point: 297.8±35.0 °C at 760 mmHg
Vapour Pressure: 0.0±1.3 mmHg at 25°C
Enthalpy of Vaporization: 59.1±6.0 kJ/mol
Flash Point: 133.9±25.9 °C
Index of Refraction: 1.547
Molar Refractivity: 38.3±0.3 cm3
#H bond acceptors: 4
#H bond donors: 3
#Freely Rotating Bonds: 4
#Rule of 5 Violations: 0
ACD/LogP: 0.45
ACD/LogD (pH 5.5): -2.40
ACD/BCF (pH 5.5): 1.00
ACD/KOC (pH 5.5): 1.00
ACD/LogD (pH 7.4): -2.55
ACD/BCF (pH 7.4): 1.00
ACD/KOC (pH 7.4): 1.00
Polar Surface Area: 106 Å2
Polarizability: 15.2±0.5 10-24cm3
Surface Tension: 59.1±3.0 dyne/cm
Molar Volume: 120.8±3.0 cm3

Predicted data is generated using the US Environmental Protection Agency�s EPISuite™ 

                        
 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  -3.60

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  387.55  (Adapted Stein & Brown method)
    Melting Pt (deg C):  257.76  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  4.78E-008  (Modified Grain method)
    Subcooled liquid VP: 1.67E-005 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  6.675e+005
       log Kow used: -3.60 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  9.177e+005 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Aliphatic Amines-acid

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   1.26E-012  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  1.538E-014 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -3.60  (KowWin est)
  Log Kaw used:  -10.288  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.688
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.8964
   Biowin2 (Non-Linear Model)     :   0.9201
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   3.2276  (weeks       )
   Biowin4 (Primary Survey Model) :   4.0411  (days        )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.4402
   Biowin6 (MITI Non-Linear Model):   0.2716
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.9807
 Ready Biodegradability Prediction:   NO

Hydrocarbon Biodegradation (BioHCwin v1.01):
    Structure incompatible with current estimation method!

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
  Vapor pressure (liquid/subcooled):  0.00223 Pa (1.67E-005 mm Hg)
  Log Koa (Koawin est  ): 6.688
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.00135 
       Octanol/air (Koa) model:  1.2E-006 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.0464 
       Mackay model           :  0.0973 
       Octanol/air (Koa) model:  9.57E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =  43.9759 E-12 cm3/molecule-sec
      Half-Life =     0.243 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     2.919 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 0.0719 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  10
      Log Koc:  1.000 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
    Rate constants can NOT be estimated for this structure!

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
   Log BCF from regression-based method = 0.500 (BCF = 3.162)
       log Kow used: -3.60 (estimated)

 Volatilization from Water:
    Henry LC:  1.26E-012 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 5.936E+008  hours   (2.473E+007 days)
    Half-Life from Model Lake : 6.476E+009  hours   (2.698E+008 days)

 Removal In Wastewater Treatment:
    Total removal:               1.85  percent
    Total biodegradation:        0.09  percent
    Total sludge adsorption:     1.75  percent
    Total to Air:                0.00  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       3.25e-005       5.84         1000       
   Water     39              360          1000       
   Soil      60.9            720          1000       
   Sediment  0.0713          3.24e+003    0          
     Persistence Time: 579 hr

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