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REACH

Pyrithione zinc

EC number: 236-671-3 | CAS number: 13463-41-7

Life Cycle description
Uses advised against

Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Fresh water invertebrates

Effect concentration:: 0.002 mg/L

Marine water invertebrates

Effect concentration:: 0.002 mg/L

Additional information

The information contained within this robust summary document comes from studies which are in the ownership of Arch Chemicals Inc. and which are protected in several regions globally. This information may not be used for any purpose other than in support of the Chemical safety Report submitted by Arch Chemicals Inc. under RegulationEC 1907/2006.

The long-term toxicity of zinc pyrithione has been investigated in a number of aquatic invertebrates and these studies are summarised inTable44.

Table44:Effects on reproduction and growth rate of ZPT with an invertebrate species

Guideline / Test method	Species	Endpoint / Type of test	Exposure		Results [mg/L]			Remarks	Reference
Guideline / Test method	Species	Endpoint / Type of test	design	Duration	NOEC	EC₅₀	LOEC	Remarks	Reference
US EPA- 72-4 (b) Chronic toxicity	Freshwater Daphnid Daphnia magna)	Mean young per surviving daphnids and mean length of surviving adults	Flow-through	21 days	0.0022	0.029	0.0049	Key study DMF solvent	Boeri RL, Magazu JP, Ward TJ (1999) Unpublished study
US EPA – 72-4 (c)	Marine Mysid Americamys bahia = Mysidopsis bahia	Mean length and dry weight of surviving mysids	Flow-through	28 days	0.00228	0.00521	0.00042	Sea water salinity 15-16‰_, DMF solvent	Boeri RL, Magazu JP, Ward TJ (1999) Unpublished study
No Standard Guideline	Sea urchin	Fertilization Phase: Successful Fertilization Embryo Phase: Normal embryos Adult Phase: Survival and diameter	Fertilization & Embryo Phase: Static Adult Phase: Flow-through	Fertilization Phase: 3 hrs Embryo Phase:48 hrs Adult Phase:30 days	Fertilization Phase: 1.0 µg/L Embryo Phase: 29 µg/L Adult Phase: 45 µg/L	NA	Fertilization Phase: 1.7 µg/L Embryo Phase: 60 µg/L Adult Phase: 99 µg/L	-	Ward & Boeri (2004) Unpublished study

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