Sodium O-ethyl dithiocarbonate

Short-term toxicity to fish

Link to relevant study record(s)

Reference

Endpoint:

short-term toxicity to fish

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Justification for type of information:

Although reliable peer-reviewed publication, raw data has not been found.
No clear details of methods or observations

Qualifier:

equivalent or similar to guideline

Guideline:

EPA OTS 797.1400 (Fish Acute Toxicity Test)

GLP compliance:

not specified

Test organisms (species):

Pimephales promelas

Test type:

static

Water media type:

freshwater

Duration:

96 h

Dose descriptor:

LC50

Effect conc.:

> 0.32 - < 3.2 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Duration:

96 h

Dose descriptor:

LC50

Effect conc.:

> 0.18 - < 1.8 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Conclusions:

The LC50 value between 0.18 and 1.8 or 0.32 and 3.2 ppm in separate studies on different commercial products (Product A and B) of sodiumethyl xanthate.

Description of key information

There is a lot of published fish toxicity data, but with limited detail.  However, there is a sufficient weight of evidence on common laboratory fish that toxicity is in the classification range 1 - 10 mg/l and the data can be used for classification.  

It is also noted that Daphnia appear to be a more susceptable indicator species and further vertebrate work is not acceptable. 

Data on other salts and related xanthates suggest the toxicity to potassium and sodium salts are comparable as expected.  

Under conditions of testing, it is considered likely that the xanthates will rapidly hydrolyse. 

Key value for chemical safety assessment

Fresh water fish

Fresh water fish

Dose descriptor:

LC50

Effect concentration:

> 0.1 - < 1 mg/L