Substance Identity
CAS Number 68959-16-0
Chemical Name Ethanesulfonic acid, 2-[[[2,5-dichloro-4-[[4-(diethylamino)-2-methylphenyl]azo]phenyl]sulfonyl]amino]-, monosodium salt
Type of substance Organic
SMILES Clc2c(cc(c(c2)N=Nc1ccc(cc1C)N(CC)CC)Cl)S(=O)(=O)NCCS(=O)(=O)O
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 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) 182
MITI probability of biodegradation 0
EPI Predicted Ozone reaction half-life (days) 999
EPI Predicted Atmospheric Oxidation half-life (days) 0.05899

Underlying data regarding Bioaccumulation

Log Kow predicted by KowWin 1.08
Log BAF T2MTL predicted by Gobas 0.229447546678611
Log BCF 5% T2LTL predicted by Gobas 0.193714157742345
Log BCF Max predicted by OASIS 1.28941733333891
Log BCF predicted by BCFWIN 0.5

Underlying data regarding inherent toxicity to aquatic organisms

Pivotal value for iT (mg/l) 3.769429
Toxicity to fish (LC50 in mg/l) as predicted by Ecosar v0.99g 270.818
Toxicity to fish (LC50 in mg/l) as predicted by Aster 3.769429
Toxicity to fish (LC50 in mg/l) as predicted by PNN 79.10903
Toxicity to fish, daphnia, algae or mysid shrimp (EC50 or LC50 in mg/l) as predicted by Ecosar v0.99g 32.462
Chronic toxicity to daphnia or algae (EC50 in mg/l) as predicted by Ecosar v0.99g 27.751
Toxicity to fish (LC50 in mg/l) as predicted by Neutral Organics QSAR in Ecosar v0.99g 2.71E+001

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