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Pencycuron

  • 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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