Potassium O-pentyl dithiocarbonate

Sediment toxicity

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

sediment toxicity: long-term

Type of information:

(Q)SAR

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification

Justification for type of information:

QSAR prediction: US EPA accepted QSAR method for chemicals properties assessment.

Qualifier:

according to guideline

Guideline:

other: QSAR model

Principles of method if other than guideline:

EPI Suite v 4.1/ECOSARv1.00

GLP compliance:

no

Remarks:

not applicable. QSAR model

Analytical monitoring:

not required

Vehicle:

no

Test organisms (species):

other: Earthworm

Details on test organisms:

no further information

Study type:

other: QSAR model

Test type:

other: QSAR model

Water media type:

freshwater

Type of sediment:

not specified

Limit test:

no

Duration:

14 d

Exposure phase:

total exposure duration

Hardness:

not applicable to QSAR models

Test temperature:

not applicable to QSAR models

pH:

not applicable to QSAR models

Dissolved oxygen:

not applicable to QSAR models

Salinity:

not applicable to QSAR models

Ammonia:

not applicable to QSAR models

Details on test conditions:

100% Potassium amyl xanthate (CAS No. 2720-73-2)
SMILES : S=C(S(K))OCCCCC
CHEM : Carbonodithioic acid, O-pentyl ester, potassium salt
MOL FOR: C6 H11 O1 S2 K1
MOL WT : 202.37
Log Kow: 2.34 (KowWin estimate)
Wat Sol: 655.8 mg/L (WskowWin estimate)

Reference substance (positive control):

no

Duration:

14 d

Dose descriptor:

LC50

Effect conc.:

263.311 mg/kg sediment dw

Nominal / measured:

not specified

Conc. based on:

not specified

Basis for effect:

other: QSAR model

Details on results:

LC50 (14-day, earthworm)= 263.311 mg/L (ppm)
1 kg of water has a volume of 1 L and the mg/kg and mg/L are the same.
LC50 (14-day, earthworm)= 263.311 mg/kg soil dw

Overview of QSARs estimations on sediment toxicity of   Potassium amyl xanthate

Method	Results	Remarks	Reference
QSAR estimate	LC50 (14-day, earthworm)=263.311 mg/L (ppm)	Reliable with restrictions, QSAR estimated data	ECOSAR Program (v1.00)

 

  

LC50 (14-day, earthworm)=263.311 mg/L (ppm)

 

Validity criteria fulfilled:

yes

Remarks:

US EPA accepted QSAR method for chemicals properties assessment.

Conclusions:

LC50 (14-day, earthworm)= 263.311 mg/L (ppm)
1 kg of water has a volume of 1 L and the mg/kg and mg/L are the same.
LC50 (14-day, earthworm)= 263.311 mg/kg soil dw

Executive summary:

The ECOSAR QSAR model predicts that 14 -day LC50 value would to be 263.311 mg/L (ppm) for freshwater sediment.

Reference 2

Endpoint:

sediment toxicity: long-term

Data waiving:

other justification

Justification for data waiving:

other:

Description of key information

The ECOSAR QSAR model predicts that 14 -day LC50 value would to be 263.311 mg/L (ppm) for freshwater sediment.

Key value for chemical safety assessment

EC50 or LC50 for freshwater sediment:

263.311 mg/kg sediment dw

EC50 or LC50 for marine water sediment:

26.33 mg/kg sediment dw

EC10, LC10 or NOEC for freshwater sediment:

52.7 mg/kg sediment dw

EC10, LC10 or NOEC for marine water sediment:

5.3 mg/kg sediment dw

Additional information

The available data for marine water sediment are limited and to obtaine the value for PNECs for saltwaters is taken account a assesment factor 10 to extrapolate to LC50 following the “Guidance on Information Requirement and Chemical Safety Assessment R.10: Characterisation of dose [concentration]- response for environment”and “Table R.10-5 Assessment factors proposed for deriving PNEC water for saltwater for different data sets”, to account for the possibility that greater taxonomic diversity in the marine environment makes it likely that some marine taxa may be more sensitive than the most sensitive freshwater taxa.