ChemSpider 2D Image | Clemastine | C21H26ClNO

Clemastine

  • Molecular FormulaC21H26ClNO
  • Average mass343.890 Da
  • Monoisotopic mass343.170288 Da
  • ChemSpider ID25129

  • defined stereocentres - 2 of 2 defined stereocentres

More details:

Featured data source
The Merck Index Online

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

(+)-2-[2-[(p-Chloro-a-methyl-a-phenylbenzyl)oxy]ethyl]-1-methylpyrrolidine
(2R)-2-(2-{[(1R)-1-(4-chlorophenyl)-1-phenylethyl]oxy}ethyl)-1-methylpyrrolidine
(2R)-2-{2-[1-(4-Chlorophenyl)-1-phenylethoxy]ethyl}-1-methylpyrrolidine [ACD/IUPAC Name]
(2R)-2-{2-[1-(4-Chlorophényl)-1-phényléthoxy]éthyl}-1-méthylpyrrolidine [French] [ACD/IUPAC Name]
(2R)-2-{2-[1-(4-Chlorphenyl)-1-phenylethoxy]ethyl}-1-methylpyrrolidin [German] [ACD/IUPAC Name]
15686-51-8 [RN]
1-Methyl-2-[2-(methyl-p-chlorodiphenylmethyloxy)ethyl]pyrrolidine
Clemastina [Spanish] [INN]
Clemastine [BAN] [USAN] [Wiki]
Clemastinum [Latin] [INN]
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Validated by Experts, Validated by Users, Non-Validated, Removed by Users

2231 [DBID]
95QN29S1ID [DBID]
6486432 [DBID]
AIDS001634 [DBID]
AIDS-001634 [DBID]
C06913 [DBID]
D03535 [DBID]
DivK1c_000285 [DBID]
HS 592 [DBID]
HS-592 [DBID]
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  • Miscellaneous

    • Safety:

      D04AA14 Wikidata Q418145
      R06AA04 Wikidata Q418145

    • Chemical Class:

      2-[(2<stereo>R</stereo>)-1-Methylpyrrolidin-2-yl]ethanol in which the hydrogen of the hydroxy group is substituted by a 1-(4-chlorophenyl)-1-phenylethyl group (<stereo>R</stereo> configuration). An an tihistamine with antimuscarinic and moderate sedative properties, it is used as its fumarate salt for the symptomatic relief of allergic conditions such as rhinitis, urticaria, conjunctivitis and in p ruritic (severe itching) skin conditions. ChEBI CHEBI:3738
      2-[(2R)-1-Methylpyrrolidin-2-yl]ethanol in which the hydrogen of the hydroxy group is substituted by a 1-(4-chlorophenyl)-1-phenylethyl group (R configuration). An an; tihistamine with antimuscarinic and moderate sedative properties, it is used as its fumarate salt for the symptomatic relief of allergic conditions such as rhinitis, urticaria, conjunctivitis and in pruritic (severe itching) skin co nditions. ChEBI https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:3738

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

Density: 1.1±0.1 g/cm3
Boiling Point: 425.2±30.0 °C at 760 mmHg
Vapour Pressure: 0.0±1.0 mmHg at 25°C
Enthalpy of Vaporization: 68.0±3.0 kJ/mol
Flash Point: 211.0±24.6 °C
Index of Refraction: 1.554
Molar Refractivity: 100.4±0.3 cm3
#H bond acceptors: 2
#H bond donors: 0
#Freely Rotating Bonds: 6
#Rule of 5 Violations: 1
ACD/LogP: 5.69
ACD/LogD (pH 5.5): 2.77
ACD/BCF (pH 5.5): 13.65
ACD/KOC (pH 5.5): 29.92
ACD/LogD (pH 7.4): 3.22
ACD/BCF (pH 7.4): 38.00
ACD/KOC (pH 7.4): 83.30
Polar Surface Area: 12 Å2
Polarizability: 39.8±0.5 10-24cm3
Surface Tension: 39.7±3.0 dyne/cm
Molar Volume: 313.3±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) =  5.49

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  411.90  (Adapted Stein & Brown method)
    Melting Pt (deg C):  152.73  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  2.12E-007  (Modified Grain method)
    Subcooled liquid VP: 4.26E-006 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):  1.403
       log Kow used: 5.49 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  1.2 mg/L

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   3.75E-009  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  6.837E-008 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  5.49  (KowWin est)
  Log Kaw used:  -6.814  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  12.304
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :  -0.2071
   Biowin2 (Non-Linear Model)     :   0.0001
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   1.7790  (months      )
   Biowin4 (Primary Survey Model) :   2.7399  (weeks-months)
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :  -0.0753
   Biowin6 (MITI Non-Linear Model):   0.0036
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -2.3010
 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):  0.000568 Pa (4.26E-006 mm Hg)
  Log Koa (Koawin est  ): 12.304
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.00528 
       Octanol/air (Koa) model:  0.494 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.16 
       Mackay model           :  0.297 
       Octanol/air (Koa) model:  0.975 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant = 110.8265 E-12 cm3/molecule-sec
      Half-Life =     0.097 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     1.158 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 0.229 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  1.415E+005
      Log Koc:  5.151 

 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 = 3.529 (BCF = 3378)
       log Kow used: 5.49 (estimated)

 Volatilization from Water:
    Henry LC:  3.75E-009 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 2.895E+005  hours   (1.206E+004 days)
    Half-Life from Model Lake : 3.159E+006  hours   (1.316E+005 days)

 Removal In Wastewater Treatment:
    Total removal:              88.15  percent
    Total biodegradation:        0.74  percent
    Total sludge adsorption:    87.41  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       0.0104          2.32         1000       
   Water     4.49            1.44e+003    1000       
   Soil      57.8            2.88e+003    1000       
   Sediment  37.7            1.3e+004     0          
     Persistence Time: 3.77e+003 hr

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