Substance Identity
CAS Number 141-79-7
Chemical Name 3-Penten-2-one, 4-methyl-
Type of substance Organic
SMILES O=C(C=C(C)C)C
Moiety of concern organic
Categorization Results

Meets Government of Canada Categorization Criteria? Yes
Meets Human Health Categorization Criteria? Yes
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) >1000T

Ecological data supporting decisions

Underlying data regarding persistence

Media of concern leading to Categorization Air-Water
Experimental Biodegradation half-life (days) Not Available
Experimental Biodegradation result (%) 77
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 0.6485
TOPKAT probability of biodegradation 0.999
EPI Predicted Ozone reaction half-life (days) 0.05741
EPI Predicted Atmospheric Oxidation half-life (days) 0.1361

Underlying data regarding Bioaccumulation

Log Kow predicted by KowWin 1.37
Log BAF T2MTL predicted by Gobas 0.383352813020655
Log BCF 5% T2LTL predicted by Gobas 0.331321520255699
Log BCF Max predicted by OASIS 1.39160179372313
Log BCF predicted by BCFWIN 0.354

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 122.2
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 122.2
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 162.818
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 707.6561
Toxicity to fish (LC50 in mg/l) as predicted by PNN 303.34272
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 48.5
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 466.233
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 2.85E+000

Human Health data supporting decisions
Underlying data regarding potential for exposure

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

Underlying data regarding Previous Assessments

Underlying data regarding Simple Hazard Assessment


Underlying data regarding Complex Hazard Assessment