Substance Identity
CAS Number 79-20-9
Chemical Name Acetic acid, methyl ester
Type of substance Organic
SMILES O=C(OC)C
Moiety of concern organic
Categorization Results

Meets Government of Canada Categorization Criteria? No
Meets Human Health Categorization Criteria? No
Other Human Health Priorities? Moderate
Meets Environmental Criteria for Categorization? No
Persistent (P)? Yes
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 Air-Water
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 15
MITI probability of biodegradation 0.9464
TOPKAT probability of biodegradation 1
EPI Predicted hydrolysis half-life (days) 6.27E+002
EPI Predicted Ozone reaction half-life (days) 999
Experimental Atmospheric Oxidation half-life (days) 31.3620071684588
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)
79209.doc
EPI Predicted Atmospheric Oxidation half-life (days) 41.18

Underlying data regarding Bioaccumulation

Empirical Log Kow 0.18
Log Kow predicted by KowWin 0.37
Log BAF T2MTL predicted by Gobas 0.01390844075231
Log BCF 5% T2LTL predicted by Gobas 0.0112268004078393
Log BCF Max predicted by OASIS 1.11339911817144
Log BCF predicted by BCFWIN 0.5

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 320
Experimental result iT (mg/l) 320
Test species iT (Latin) Pimephales promelas
Test species iT (Common) Fathead minnow
Final EndPoint iT LC50
Exposure duration iT (hours) 96
Reference iT Center for Lake Superior Environmental Stud., Univ.of Wisconsin-Superior, Superior, WI :414
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 637.1
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 83.513
Toxicity to fish (LC50 in mg/l) as predicted by Aster 204.227281
Toxicity to fish (LC50 in mg/l) as predicted by PNN 66.7358
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 395
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 1,790.612
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 6.23E+002

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


Underlying data regarding Complex Hazard Assessment