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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.233 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
2.33 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
23.3 ng/L
Assessment factor:
10 000
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.233 µg/L

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
0.052 mg/L
Assessment factor:
100

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
2.56 mg/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:
5.13 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Classification related key information

Biodegradation: not relevant, inorganic substance

Acute toxicity:

-            Fish: LC50 (96 h) is > 4.508 mg test item/L (geom. mean measured)

-            Aquatic invertebrates: EC(L)50 (48 h): 26 mg test item/L (nominal)

-            Aquatic algae: EC50 (72 h) 0.233 mg test item /L (meas. geom. mean)

Chronic toxicity: 

-            Aquatic algae: EC10 (72 h): 0.094 mg test item/L (meas. geom. mean)

Conclusion on classification

Dizinc pyrophosphate is an inorganic substance. The water solubility is 12.871 mg test item/L at loading rate of 251 mg/L, 20 °C and pH 6.5 -6.7 . Acute toxic effects (EC50(72 h) for algae) were observed at a test substance concentration of 0.233 mg test item /L. For chronic toxicity an EC10 (72 h): 0.094 mg test item/L was observed. Because the determined water solubility of test item is greater than the lowest acute ERV test item/L, the test item is considered as readily soluble according to Annex VI to the Guidance on the Application of the CLP Criteria. Thus, the classification of aquatic toxicity can be determined on the basis of EC50 and EC10 values. A significant precipitation of soluble zinc compounds is expected only at reducing conditions in waters with high zinc concentrations. A rapid environmental transformation is not anticipated when the test item releases into aquatic environment. Based on the available data the substance is classified as Aquatic Acute 1 (M-factor = 1) and Aquatic Chronic (M-factor = 1)  according to the consolidated version of Regulation (EC) No. 1272/2008 (CLP) considering all further amendments.