Substance Identity
CAS Number 75-83-2
Chemical Name Butane, 2,2-dimethyl-
Type of substance Organic
SMILES C(CC)(C)(C)C
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)? Yes
Rational for P Experiment
Bioaccumulative (B)? No
Rational for B Category
Inherently Toxic to Aquatic Organisms (iT)? No
Rational for iT Category
DSL Quantity range (tonnes/year) >1T to 1000T

Ecological data supporting decisions

Underlying data regarding persistence

Media of concern leading to Categorization Air
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 15
MITI probability of biodegradation 0.7199
TOPKAT probability of biodegradation 0.007
EPI Predicted Ozone reaction half-life (days) 999
Experimental Atmospheric Oxidation half-life (days) 4.60967432950192
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)
75832.doc
EPI Predicted Atmospheric Oxidation half-life (days) 5.884

Underlying data regarding Bioaccumulation

Empirical Log Kow 3.82
Log Kow predicted by KowWin 3.18
Log BAF T2MTL predicted by Gobas 2.67277091531705
Log BCF 5% T2LTL predicted by Gobas 2.52679375416192
Log BCF Max predicted by OASIS 2.55124699345028
Log BCF predicted by BCFWIN 2.241

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 7.4
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 7.4
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 4.968
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 33.5927
Toxicity to fish (LC50 in mg/l) as predicted by Aster 2.473377
Toxicity to fish (LC50 in mg/l) as predicted by PNN 15.21067
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 130.7
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 0.617
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 0.496
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 4.97E+000

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