Substance Identity
CAS Number 75-18-3
Chemical Name Methane, thiobis-
Type of substance Organic
SMILES S(C)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
Experimental Biodegradation half-life (days) Not Available
Predicted Ultimate degradation half-life (days) 15
MITI probability of biodegradation 0.6837
EPI Predicted Ozone reaction half-life (days) 999
Experimental Atmospheric Oxidation half-life (days) 2.21876440756109
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
EPI Predicted Atmospheric Oxidation half-life (days) 2.799

Underlying data regarding Bioaccumulation

Log Kow predicted by KowWin 0.92
Log BAF T2MTL predicted by Gobas 0.164983235040965
Log BCF 5% T2LTL predicted by Gobas 0.137726174961988
Log BCF Max predicted by OASIS 1.24055006231619
Log BCF predicted by BCFWIN 0.5

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 14.3
Experimental result iT (mg/l) 14.3
Exposure duration iT (hours) 24
Robust Study Summary iT
75183-AT-EC50-I-dapmag.doc
Toxicity to fathead minnow (LC50 in mg/l) as predicted by Topkat v6.1 1,400
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 476.983
Toxicity to fish (LC50 in mg/l) as predicted by Oasis Forecast M v1.10 1,804.6053
Toxicity to fish (LC50 in mg/l) as predicted by Aster 564.952438
Toxicity to daphnia (EC50 in mg/l) as predicted by Topkat v6.1 43.5
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 278.678
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 15.167
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 4.77E+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