Substance Identity
CAS Number 32741-11-0
Chemical Name Pyrazine, (1,1-dimethylethyl)-
Type of substance Organic
SMILES n(ccnc1C(C)(C)C)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 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
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 37.5
MITI probability of biodegradation 0.357
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 10.61

Underlying data regarding Bioaccumulation

Log Kow predicted by KowWin 1.85
Log BAF T2MTL predicted by Gobas 0.733349646445362
Log BCF 5% T2LTL predicted by Gobas 0.65888545104743
Log BCF Max predicted by OASIS 1.61035278899575
Log BCF predicted by BCFWIN 0.724

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 139.692
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 139.692
Toxicity to fish (LC50 in mg/l) as predicted by Aster 289.675813
Toxicity to fish (LC50 in mg/l) as predicted by PNN 361.17568
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 71.8
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 44.841
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 7.115
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 1.40E+002

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