Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
1.12 µg/L
Assessment factor:
50
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.93 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.112 µg/L
Assessment factor:
500
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
64 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
4.64 µg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
3.86 µg/kg sediment dw
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:
1.78 mg/kg soil dw
Assessment factor:
100
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

For the relevant tonnage band studies on aquatic an terrestrial toxicity were necessary. Additional information on sediment toxicity are available (EFSA report (July 2020)), as captan is used as active ingredient in plant protection products.


 


Captan is acute toxic in aquatic systems with the most sensitive species fish (Salmo trutta LC50 (96 h) = 0,093 mg/L; Oncorhynchus mykiss NOEC(21d) = 0.056mg/l)) leading to classification as acute toxic in aquatic systems category 1 (H400) according to Annex 1, Chapter 4 of regulation 1272/2008.


 


For algae based on biomass low toxicity was observed (Pseudokirchnerella subcapitata EC50 (96 h): 1.6 mg/L; NOEC (96 h): 0.2 mg/L). Even for invertebrates low toxicity was found (Daphnia magna EC50 (48 h)> 7.1 mg/L; NOEC (21 d) = 0.56 mg/L). The effects on aquatic microorganisms are comparable to algae and invertebrate results (STP EC50 (3 h)= 8.2 mg/L); NOEC (3 h): 0.64 mg/L).


 


For springtails (Collembola, Isotomidae) only low soil toxicity was found (NOEC (28 d) = 177 mg/kg soil dw, EC50 (median effect concentration) = 807.9 mg a.i./kg soil), either for earthworms (Eisenia foetida, LC50 (14 d) >519 mg/kg soil dw). Also for bees LD50 was not reached in a range up to 100 µg captan/bee.


The EC50 and EC10 of captan to soil microorganisms (Pseudomonas putida), was 0.22 and 0.07 mg/L (in water), respectively.


 


No phytotoxic effects were observed in a test with 6 different crop plants (including both monocotyledon and dicotyledon plant species) at dose rates of 1.92 kg captan/ha (21 d) indicating a low risk to non-target organisms.

Conclusion on classification

According to long-term studies on fish with LC50 values of 75 µg/L captan has to be classified as acute toxic category 1 (H400) in aquatic systems according to annex I, chapter 4 ff regulation 1272/2008.


Due to fast hydrolysis in aquatic systems no classification in respect to chronic aquatic toxicity is applicable. Main hydrolysis products (carbon dioxide, THPI) are not classified as being hazardous.