Substance Identity
CAS Number 91-58-7
Chemical Name Naphthalene, 2-chloro-
Type of substance Organic
SMILES c(c(ccc1Cl)ccc2)(c2)c1
Moiety of concern organic
Categorization Results

Meets Government of Canada Categorization Criteria? No
Meets Human Health Categorization Criteria? No
Meets Environmental Criteria for Categorization? No
Persistent (P)? No
Rational for P QSAR
Bioaccumulative (B)? No
Rational for B Experiment
Inherently Toxic to Aquatic Organisms (iT)? No
Rational for iT QSAR
DSL Quantity range (tonnes/year) 0 to 1T

Ecological data supporting decisions

Underlying data regarding persistence

Media of concern leading to Categorization Air-Water-Soil
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 37.5
MITI probability of biodegradation 0.1755
TOPKAT probability of biodegradation 0
Experimental Hydrolysis half-life (days) 3,029.5
Reference (hydrolysis) ELLINGTON,J.J.; STANCIL,F.E.; PAYNE,W.D.; TRUSTY,C.D.; MEASUREMENT OF HYDROLYSIS RATE CONSTANTS FOR EVALUATION OF HAZARDOUS WASTE LAND DISPOSAL: VOLUME 3. DATA ON 70 CHEMICALS; NTISPB88-234 042/AS; EPA/600/S3-88/028; 1988A
Robust Study Summary (hydrolysis)
91587.doc
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 0.7039

Underlying data regarding Bioaccumulation

Empirical Log Kow 3.98
Reference (Log Kow) HANSCH,C & LEO,AJ (1985)
Log Kow predicted by KowWin 3.81
Log BAF T2MTL predicted by Gobas 2.85337612998619
Log BCF 5% T2LTL predicted by Gobas 2.68553678132287
Log BCF Max predicted by OASIS 3.14419618567696
Log BCF predicted by BCFWIN 2.365
Experimental BCF (log) 3.63
Reason for pivotal value Only Vertebrate BCF
Test species BCF/BAF (Latin) Poecilia reticulata
Test species BCF/BAF (Common) Guppy
Mean water concentration (comment) Uncertain; exposure concentration not reported
Water concentration: Measured/Nominal/Uncertain Measured
RadioLabel No
Exposure duration (days) 7
Exposure duration (comment) Sufficient exposure duration for 80% steady state; K1/K2
Exposure type Flow-through
Mean temperature (deg. Celcius) 22
Exposure route Water
Exposure media Fresh Water
Tissue analysed Whole body
Calculation method K1/K2
Reference (BAF/BCF) Opperhuizen, A., E.W. van der Velde, F.A.P.C. Gobas, D.A.K. Liem and J.M.D. van der Steen. 1985. Relationship between Bioconcentration in Fish and Steric Factors of Hydrophobic Chemicals. Chemosphere 14:1871-1896

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 2.4
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 2.4
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 2.398
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 2.4041
Toxicity to fish (LC50 in mg/l) as predicted by Aster 2.494333
Toxicity to fish (LC50 in mg/l) as predicted by PNN 4.95975
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 4.9
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 0.19
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 0.33
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 2.40E+000

Human Health data supporting decisions
Underlying data regarding potential for exposure

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

Underlying data regarding Previous Assessments

Underlying data regarding Simple Hazard Assessment


Underlying data regarding Complex Hazard Assessment