Substance Identity
CAS Number 490-79-9
Chemical Name Benzoic acid, 2,5-dihydroxy-
Type of substance Organic
SMILES O=C(O)c(c(O)ccc1O)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 QSAR
DSL Quantity range (tonnes/year) 0 to 1T

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 (%) 97.6
Reference (biodegradation result) PITTER,P.; DETERMINATION OF BIOLOGICAL DEGRADABILITY OF ORGANIC SUBSTANCES.; WATER RES.; 10:231-5.; 1976
Robust Study Summary (biodegradation result)
490799.doc
Predicted Ultimate degradation half-life (days) 15
MITI probability of biodegradation 0.8651
TOPKAT probability of biodegradation 0.999
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 1.151

Underlying data regarding Bioaccumulation

Empirical Log Kow 1.74
Log Kow predicted by KowWin 1.76
Log BAF T2MTL predicted by Gobas 0.644395761216457
Log BCF 5% T2LTL predicted by Gobas 0.574194766278571
Log BCF Max predicted by OASIS 1.56702007699054
Log BCF predicted by BCFWIN 0.5

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 2.6
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 2.6
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 318.206
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 310.1853
Toxicity to fish (LC50 in mg/l) as predicted by Aster 259.647375
Toxicity to fish (LC50 in mg/l) as predicted by PNN 17.44155
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 399.2
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 334.895
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 1.92E+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