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Pencycuron
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  • Name Pencycuron
  • EINECS266-096-3
  • CAS No. 66063-05-6
  • Density1.22 g/cm3
  • PSA32.34000
  • LogP5.38970
  • Solubility0.3 mg l-1 (20 °C)
  • Melting Point129 - 134oC
  • FormulaC19H21ClN2O
  • Boiling Point528.5 °C at 760 mmHg
  • Molecular Weight328.842
  • Flash Point273.4 °C
  • Transport InformationN/A
  • AppearanceRed liquid with a slight characteristic odor.
  • Safety
  • Risk CodesN/A
  • Molecular Structure
    Molecular Structure of 66063-05-6 (N-((4-Chlorophenyl)methyl)-N-cyclopentyl-N'-phenylurea)
  • Hazard SymbolsN/A
  • SynonymsN/A
  • Article Data12

Pencycuron Chemical Properties

 Urea, N-((4-chlorophenyl)methyl)-N-cyclopentyl-N’-phenyl- (66063-05-6) is also named as N-((4-Chlorophenyl)methyl)-N-cyclopentyl-N'-phenylurea ; Bay NTN 19701 ; [(Chlorophenyl)-methyl]-N-cyclopentyl-N'-phenylurea ; 1-(p-chlorobenzyl)-1-cyclopentyl-3-phenylurea ; Monceren ; Caswell No. 638A ; Pencycuron [BSI:ISO] ,and so on. Urea, N-((4-chlorophenyl)methyl)-N-cyclopentyl-N’-phenyl- (66063-05-6) is usually red liquid with a slight characteristic odor.

IUPAC Name: 1-[(4-Chlorophenyl)methyl]-1-cyclopentyl-3-phenylurea
CAS: 66063-05-6
Molecular Formula: C19H21ClN2O
Molecular Weight: 328.84
Molecular structure:
EINECS: 266-096-3
Storage temp.:  0-6°C 
ACD/LogD (pH 5.5): 4.82 
ACD/LogD (pH 7.4): 4.82 
ACD/BCF (pH 5.5): 2710.98 
ACD/BCF (pH 7.4): 2711 
ACD/KOC (pH 5.5): 9977.62 
ACD/KOC (pH 7.4): 9977.68 
H bond acceptors: 3 
H bond donors: 1 
Freely Rotating Bonds: 4 
Index of Refraction: 1.619 
Molar Refractivity: 94.28 cm3 
Molar Volume: 268.6 cm3 
Polarizability: 37.37 10-24cm3 
Surface Tension: 52.5 dyne/cm 
Density: 1.22 g/cm3 
Flash Point: 273.4 °C 
Enthalpy of Vaporization: 80.33 kJ/mol 
Boiling Point: 528.5 °C at 760 mmHg 
Vapour Pressure: 2.96E-11 mmHg at 25°C 

Pencycuron Uses

 Urea, N-((4-chlorophenyl)methyl)-N-cyclopentyl-N’-phenyl- (66063-05-6) is commonly used as agricultural fungicide for the control of plant diseases.

Pencycuron Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
bird - domestic LD50 oral > 1gm/kg (1000mg/kg)   "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86Vol. A793, Pg. 1985,
chicken LD50 oral > 2500mg/kg (2500mg/kg)   "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86Vol. A793, Pg. 1985,
dog LD50 oral > 5gm/kg (5000mg/kg)   Japan Pesticide Information. Vol. (48), Pg. 16, 1986.
mouse LD50 intraperitoneal > 1gm/kg (1000mg/kg)   Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 13, Pg. 163, 1988.
mouse LD50 oral > 5gm/kg (5000mg/kg)   Japan Pesticide Information. Vol. (48), Pg. 16, 1986.
mouse LD50 skin > 5gm/kg (5000mg/kg)   Japan Pesticide Information. Vol. (48), Pg. 16, 1986.
mouse LD50 subcutaneous > 1gm/kg (1000mg/kg)   Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 13, Pg. 163, 1988.
quail LD50 oral > 2500mg/kg (2500mg/kg)   "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86Vol. A793, Pg. 1985,
rat LC50 inhalation > 570mg/m3/4H (570mg/m3)   Japan Pesticide Information. Vol. (48), Pg. 16, 1986.
rat LD50 intraperitoneal 1gm/kg (1000mg/kg)   Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 13, Pg. 163, 1988.
rat LD50 oral > 5gm/kg (5000mg/kg)   Japan Pesticide Information. Vol. (48), Pg. 16, 1986.
rat LD50 skin > 5gm/kg (5000mg/kg)   Japan Pesticide Information. Vol. (48), Pg. 16, 1986.
rat LD50 subcutaneous 1gm/kg (1000mg/kg)   Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 13, Pg. 163, 1988.

RTECS:  YS6440000

Pencycuron Safety Profile

Moderately toxic by intraperitoneal and subcutaneous routes. When heated to decomposition it emits toxic vapors of NOx and Cl−.

Pencycuron Specification

Removal in wastewater treatment of Urea, N-((4-chlorophenyl)methyl)-N-cyclopentyl-N’-phenyl- (66063-05-6) can be stated as follows:
Total removal:71.19  percent
Total biodegradation:0.63  percent
Total sludge adsorption:70.56  percent
Total to Air:0.00  percent
(using 10000 hr Bio P,A,S)

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