Substance Identity
CAS Number 66-77-3
Chemical Name 1-Naphthalenecarboxaldehyde
Type of substance Organic
SMILES O=Cc(c(c(ccc1)cc2)c1)c2
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 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-Soil
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 15
MITI probability of biodegradation 0.8322
TOPKAT probability of biodegradation 1
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 0.3843

Underlying data regarding Bioaccumulation

Log Kow predicted by KowWin 2.89
Log BAF T2MTL predicted by Gobas 1.70475620308709
Log BCF 5% T2LTL predicted by Gobas 1.60760920846483
Log BCF Max predicted by OASIS 2.30471285662932
Log BCF predicted by BCFWIN 1.522

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 30.1
Robust Study Summary iT
66773-AT-LC50-I-Aedaeg.doc
66773-AT-LC50-I-Culqui.doc
66773-AT-LC50-I-Aedtae.doc
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 30.1
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 3.9143
Toxicity to fish (LC50 in mg/l) as predicted by Aster 13.458488
Toxicity to fish (LC50 in mg/l) as predicted by PNN 12.35048
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 5.3
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 12.647
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 1.69E-001

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