Substance Identity
CAS Number 87-91-2
Chemical Name Butanedioic acid, 2,3-dihydroxy- [R-(R*,R*)]-, diethyl ester
Type of substance Organic
SMILES O=C(OCC)C(O)C(O)C(=O)OCC
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 Experiment
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
Predicted Ultimate degradation half-life (days) 8.67
MITI probability of biodegradation 0.9848
EPI Predicted hydrolysis half-life (days) 5.97E+001
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 1.218

Underlying data regarding Bioaccumulation

Empirical Log Kow -0.29
Log Kow predicted by KowWin -0.08
Log BAF T2MTL predicted by Gobas 0.0000540371955876
Log BCF 5% T2LTL predicted by Gobas 0.0005144646215092
Log BCF Max predicted by OASIS 1.04381353801939
Log BCF predicted by BCFWIN 0.5

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 650
Experimental result iT (mg/l) 650
Exposure duration iT (hours) 96
Robust Study Summary iT
87912-AT-LC50-F-pimpro.doc
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 404.653
Toxicity to fish (LC50 in mg/l) as predicted by PNN 265.88653
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 12,796.253
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 4.60E+003

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