Tin sulphate

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.032 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

0.182 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

3.2 µg/L

Assessment factor:

100

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

0.102 mg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

83.4 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

11 889 mg/kg sediment dw

Assessment factor:

1

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

1 188.9 mg/kg sediment dw

Assessment factor:

1

Extrapolation method:

equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

PNEC soil

PNEC value:

0.136 mg/kg soil dw

Assessment factor:

50

Extrapolation method:

assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

 Derivation of PNECs 

 

 The PNECs for the different compartments are calculated either by application an assessment factor (PNEC freshwater, PNEC marine water, PNEC intermittent release and PNEC stp) or using the equilibrium assumption method (PNEC sediment-freshwater, PNEC sediment-marine-water and PNEC soil). The PNEC air is not considered as relevant based on the chemical structure and intrinsic properties of the registered substance. Secondary exposure of mammals and birds is not expected, and since no adequate bird or mammalian data are available, the PNECsecondary poisoning is omitted. The utilized procedures are described in detail in the ECHA REACH Guidance of May 2008, Chapter R.10 (”Characterisation of dose [concentration]-response for environment”). 

Summary Ecotoxicological key vlaues for environmental assessment

Species	Long-term	Short-term	Comments
Fish	NOEC 5.37 mg/L	LD50(96h) 10.19 mg/L marine water
Daphnia	NOEC 0.32 mg/L freshwater (D. magna)	LD50 (48h) 95 mg/L marine water (Idotea balthica basteri) EC50 (48h) 22 mg/L fresh water (D. magna)
Algae	NOEC (96h) 9.1 mg/L (Synechocystis aquatilis)	EC50 (96h) 18.2 mg/L	freshwater
Microorganisms	EC10 834 mg/L	EC50 1194 mg/L

Conclusion on classification

The base set for acute toxicity is complete and chronic toxicity data are available for three trophic levels for tin compounds (e.g. SnCl₂).

Applying the criteria for classification of soluble metal compounds specified in the ‘Guidance on the Application of the CLP Criteria’ (version 5.0 – July 2017), Annex IV, classification for acute environmental toxicity is not needed if the ERV > 1 mg/L. The lowest chronic value was obtained in freshwater study with Daphnia magna with SnCl₂ of 0.32 mg/L, already corrected to the chronic ERV. In cases where both the acute and chronic ERV are greater than 1 mg/L there is no need to classify for either acute or chronic effects according to Regulation (EC) No 1272/2008. For the tin compound the chronic ERVcompound is > 0.1 mg/L and ≤ 1 mg/L and there is evidence of rapid environmental transformation (Disscussion see in endpoint summary Environmental fate and pathways). Therefore the test item meets the criteria for classification as Aquatic Chronic 3 (H412) according to Regulation (EC) No 1272/2008.