Substance Identity
CAS Number 526-73-8
Chemical Name Benzene, 1,2,3-trimethyl-
Type of substance Organic
SMILES c(c(c(cc1)C)C)(c1)C
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 Category
Bioaccumulative (B)? No
Rational for B Experiment
Inherently Toxic to Aquatic Organisms (iT)? No
Rational for iT Experiment
DSL Quantity range (tonnes/year) >1T to 1000T

Ecological data supporting decisions

Underlying data regarding persistence

Media of concern leading to Categorization Air-Soil
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 37.5
MITI probability of biodegradation 0.5837
TOPKAT probability of biodegradation 0.007
Experimental Ozone Reaction half-life (days) 7,161.45833333333
Reference (ozone reaction) ATKINSON,R.; KINETICS AND MECHANISMS OF THE GAS-PHASE REACTIONS OF THE HYDROXYL RADICAL WITH ORGANIC COMPOUNDS.; JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA. MONOGRAPH NO. 1.; 1989
EPI Predicted Ozone reaction half-life (days) 999
Experimental Atmospheric Oxidation half-life (days) 0.327047230716955
Reference (oxidation) ATKINSON,R.; KINETICS AND MECHANISMS OF THE GAS-PHASE REACTIONS OF THE HYDROXYL RADICAL WITH ORGANIC COMPOUNDS.; JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA. MONOGRAPH NO. 1.; 1989
Robust Study Summary (oxidation)
526738.doc
EPI Predicted Atmospheric Oxidation half-life (days) 0.6406

Underlying data regarding Bioaccumulation

Empirical Log Kow 3.66
Reference (Log Kow) HANSCH,C & LEO,AJ (1985)
Log Kow predicted by KowWin 3.63
Log BAF T2MTL predicted by Gobas 1.84955397671933
Log BCF 5% T2LTL predicted by Gobas 1.8233027553228
Log BCF Max predicted by OASIS 2.97277304300557
Log BCF predicted by BCFWIN 2.118
Experimental BCF (log) 2.26798460157114
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) 150
Mean water concentration (comment) Below water solubility by a factor of 5
Water concentration: Measured/Nominal/Uncertain Measured
RadioLabel No
Exposure duration (days) 56
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 (%) 7
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) 7
Experimental result iT (mg/l) 7
Test species iT (Latin) Oryzias latipes
Test species iT (Common) orange-red killifish
Final EndPoint iT LC50
Reference iT 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 iT
RSS - MITI book.doc
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 13.9
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 2.616
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 4.2235
Toxicity to fish (LC50 in mg/l) as predicted by Aster 3.885704
Toxicity to fish (LC50 in mg/l) as predicted by PNN 11.34222
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 3.7
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 0.236
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 0.328
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 2.62E+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