Substance Identity
CAS Number 330-54-1
Chemical Name Urea, N'-(3,4-dichlorophenyl)-N,N-dimethyl-
Type of substance Organic
SMILES O=C(N(C)C)Nc(ccc(c1Cl)Cl)c1
Moiety of concern organic
Categorization Results

Meets Government of Canada Categorization Criteria? Yes
Meets Human Health Categorization Criteria? Yes
Meets Environmental Criteria for Categorization? Yes
Persistent (P)? Yes
Rational for P Experiment
Bioaccumulative (B)? No
Rational for B Experiment
Inherently Toxic to Aquatic Organisms (iT)? Yes
Rational for iT Experiment
DSL Quantity range (tonnes/year) >1000T
Basis for Environment Categorization (PiT, BiT, PBiT) if categorized? PiT

Ecological data supporting decisions

Underlying data regarding persistence

Media of concern leading to Categorization Water
Experimental Biodegradation half-life (days) Not Available
Experimental Biodegradation result (%) 0
Reference (biodegradation result) CHEMICALS INSPECTION AND TESTING INSTITUTE.; BIODEGRADATION AND BIOACCUMULATION DATA OF EXISTING CHEMICALS BASED ON THE CSCL JAPAN.; JAPAN CHEMICAL INDUSTRY ECOLOGY - TOXICOLOGY AND INFORMATION CENTER.ISBN 4-89074-101-1.; 1992
Robust Study Summary (biodegradation result)
MITI book - P data.doc
Predicted Ultimate degradation half-life (days) 37.5
MITI probability of biodegradation 0.0142
TOPKAT probability of biodegradation 0
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 0.9834

Underlying data regarding Bioaccumulation

Empirical Log Kow 2.68
Reference (Log Kow) HANSCH,C & LEO,AJ (1985)
Log Kow predicted by KowWin 2.67
Log BAF T2MTL predicted by Gobas 0.286384488897801
Log BCF 5% T2LTL predicted by Gobas 0.287395408553059
Log BCF Max predicted by OASIS 2.13684636665178
Log BCF predicted by BCFWIN 1.364
Experimental BCF (log) 0.773493075689237
Reason for pivotal value Average Vertebrate BCF
Test species BCF/BAF (Latin) Cyprinus carpio
Test species BCF/BAF (Common) Common carp
Mean water concentration (ug/l) 500
Mean water concentration (comment) Below water solubility by a factor of 5
Water concentration: Measured/Nominal/Uncertain Measured
RadioLabel No
Exposure duration (days) 42
Exposure duration (comment) Sufficient exposure duration for 80% steady state; "Reported steady state"
Exposure type Flow-through
Mean temperature (deg. Celcius) 22
Exposure route Water (but fed)
Exposure media Fresh Water
Mean measured lipid content (%) 3.5
Tissue analysed Whole body
Calculation method Cb/Cw
Comment (BAF/BCF) Average BCF; Apparent measured water concentrations; Reported "Steady state"
Reference (BAF/BCF) Chemicals Evaluation and Research Institute. 1992. Biodegradation and Bioconcentration of Existing Chemical Substances under the Chemical Substances Control Law. http://qsar.cerij.or.jp/cgi-bin/DEGACC/index.cgi?e

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 0.0024
Experimental result iT (mg/l) 0.0024
Test species iT (Latin) Selestrum capricornutum
Test species iT (Common) Green algae
Final EndPoint iT EC50
Exposure duration iT (hours) 96
Reference iT Environmental Fate and Effects Division, U.S.EPA, Washington, D.C.
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 18.4
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 40.527
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 32.5352
Toxicity to fish (LC50 in mg/l) as predicted by Aster 41.204531
Toxicity to fish (LC50 in mg/l) as predicted by PNN 12.37976
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 0.114
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 3.127
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 1.35E+001

Human Health data supporting decisions
Underlying data regarding potential for exposure

LPE/IPE/GPE Intermediate Potential for Exposure (HC Simple Exposure Tool)

Underlying data regarding Previous Assessments

Underlying data regarding Simple Hazard Assessment

AgencyAssessment
EC Carcinogenicity - Category 3

Underlying data regarding Complex Hazard Assessment