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Endpoint summary

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Description of key information

Additional information

Short term toxicity to fish

The summary of the key and supporting studies are presented below :

Sr.No

Endpoint

Effect values

Basis for effects

Duration

Species

Sources

1

LC50

>5.8 to < 11.6 mg/L

Mortality

96 hrs.

Danio rerio

 Study report

2

LC50

> 6.24 mg/L

Mortality

96 hrs.

Danio rerio

 Study Report

3

LC50

14.381 mg/L

Mortality

9 hrs

Danio rerio

Predicted report

 4  LC50  2.8 mg/L  Mortality  24 hrs.  Anguilla rostrata  Publication data of RA

Based upon the experimental results of the key study, the median lethal concentration [LC-50 (96 h)] for CAS No. -6786-83-0 on Danio rerio was found to be > 5.8 mg/L and < 11.6 mg/L. Supporting study also shows the LC50 to be in the range of 1 to 10 mg/L. Thus, the chemical Solvent Blue 4 (with < 0.1 % Michler's Ketone is expected to be toxic to fish in the Chronic Category 2.

Short term toxicity to aquatic invertebrates

The Lethal Concentration (LC50) value of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4) in Aquatic invertebrate Daphnia magna in a 48 hrs study was estimated to be 11.43385 mg/L. Thus,considering the CLP Criteria for aquatic classification of the substance , it is concluded that α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol exhibit short term toxicity to Aquatic invertebrate [Daphnia magna] in Chronic category 3.

Long term toxicity to aquatic invertebrates

The No Observed Effect Concentration (NOEC) of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4) in Aquatic invertebrate (Daphnia Magna) in 504 hrs study on reproduction effect was estimated to be 0.4063749 mg/L.

Toxicity to aquatic algae and cyanobacteria

The Effective Concentration (EC50) value of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4) in Aquatic algae (Pseudokirchnerella subcapitata) in a 72 hrs study on growth effect was estimated to be 19.2033 mg/L. Thus,considering the CLP Criteria for aquatic classification of the substance , it is concluded that α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol exhibit short term toxicity to Aquatic algae (Pseudokirchnerella subcapitata) in Chronic category 3

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