Substance Identity
CAS Number 120-80-9
Chemical Name 1,2-Benzenediol
Type of substance Organic
SMILES Oc(c(O)ccc1)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 Experiment
Bioaccumulative (B)? No
Rational for B QSAR
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 Water
Experimental Biodegradation half-life (days) Not Available
Experimental Biodegradation result (%) 83
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) 15
MITI probability of biodegradation 0.6909
TOPKAT probability of biodegradation 0.998
EPI Predicted Ozone reaction half-life (days) 999
Experimental Atmospheric Oxidation half-life (days) 0.102831196581197
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
EPI Predicted Atmospheric Oxidation half-life (days) 0.4606

Underlying data regarding Bioaccumulation

Empirical Log Kow 0.88
Log Kow predicted by KowWin 1.03
Log BAF T2MTL predicted by Gobas 0.151035349997032
Log BCF 5% T2LTL predicted by Gobas 0.125758741936309
Log BCF Max predicted by OASIS 1.27436007140842
Log BCF predicted by BCFWIN 0.5

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 3.5
Experimental result iT (mg/l) 3.5
Test species iT (Latin) Pimephales promelas
Test species iT (Common) Fathead minnow
Final EndPoint iT LC50
Exposure duration iT (hours) 96
Reference iT Arch.Environ.Contam.Toxicol. 9(5):557-568
Robust Study Summary iT
120809-AT-LC50-F-pimpro.doc
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 102.9
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 64.027
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 1,772.7266
Toxicity to fish (LC50 in mg/l) as predicted by Aster 151.752719
Toxicity to fish (LC50 in mg/l) as predicted by PNN 6.76997
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 22
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 394.721
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 6.66E+000

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
IARC Carcinogenicity - Group 2B

Underlying data regarding Complex Hazard Assessment