substances shall be classified as "environmentally hazardous substances (aquatic environment)", if they satisfy the criteria for acute 1, chronic 1 or chronic 2, according to table2.2.9.1.10.3.1. these criteria describe in detail the classification categories. they are diagrammatically summarized in table 2.2.9.1.10.3.2.
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11 special guidance on data interpretation is provided in chapter 4.1 and annex 9 of the ghs.
12 see chapter 4.1 and annex 9, paragraph a9.4.2.2.3 of the ghs.
table 2.2.9.1.10.3.1: categories for substances hazardous to the aquatic environment (see note 1)
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(a) |
acute (short-term) aquatic hazard |
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category acute 1:(see note 2) |
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| 96 hr lc50(for fish) |
≤ 1 mg/l and/or |
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| 48 hr ec50(for crustacea) |
≤ 1 mg/l and/or |
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| 72 or 96hr erc50(for algae or other aquatic plants) |
≤ 1 mg/l (see note 3) |
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(b) |
long-term aquatic hazard (see also figure 2.2.9.1.10.3.1) |
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(i) |
non-rapidly degradable substances (see note 4) for which there are adequate chronic toxicity data available |
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category chronic 1:(see note2) |
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chronic noec or ecx (for fish) |
≤ 0,1 mg/l and/or |
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chronic noec or ecx (for crustacea) |
≤ 0,1 mg/l and/or |
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chronic noec or ecx (for algae or other aquatic plants) |
≤ 0,1 mg/l |
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category chronic 2: |
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chronic noec or ecx (for fish) |
≤ 1 mg/l and/or |
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chronic noec or ecx (for crustacea) |
≤ 1 mg/l and/or |
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chronic noec or ecx (for algae or other aquatic plants) |
≤ 1 mg/l |
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(ii) |
rapidly degradable substances for which there are adequate chronic toxicity data available |
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category chronic 1:(see note2) |
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chronic noec or ecx (for fish) |
≤ 0,01 mg/l and/or |
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chronic noec or ecx (for crustacea) |
≤ 0,01 mg/l and/or |
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chronic noec or ecx (for algae or other aquatic plants) |
≤ 0,01 mg/l |
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category chronic 2: |
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chronic noec or ecx (for fish) |
≤ 0,1 mg/l and/or |
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chronic noec or ecx (for crustacea) |
≤ 0,1 mg/l and/or |
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chronic noec or ecx (for algae or other aquatic plants) |
≤ 0,1 mg/l |
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(iii) |
substances for which adequate chronic toxicity data are not available |
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category chronic 1:(see note2) |
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96 hr lc50 (for fish) |
≤ 1 mg/l and/or |
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48 hr ec50 (for crustacea) |
≤ 1 mg/l and/or |
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72 or 96 hr erc50 (for algae or other aquatic plants) |
≤ 1 mg/l (see note3) |
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and the substance is not rapidly degradable and/or the experimentally determined bcf is ≥ 500 (or if absent the log kow ≥ 4) (see notes 4 and 5) |
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category chronic 2: |
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96 hr lc50 (for fish) |
>1 but ≤ 10 mg/l and/or |
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48 hr ec50 (for crustacea) |
>1 but ≤ 10 mg/l and/or |
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72 or 96 hr erc50 (for algae or other aquatic plants) |
>1 but ≤ 10 mg/l (see note3) |
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and the substance is not rapidly degradable and/or the experimentally determined bcf is ≥ 500 (or, if absent the log kow ≥ 4) (see notes 4 and 5) |
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note 1: the organisms fish, crustacea and algae are tested as surrogate species covering a range of trophic levels and taxa, and the test methods are highly standardized. data on other organisms may also be considered, however, provided they represent equivalent species and test endpoints.
note 2: when classifying substances as acute 1 and/or chronic 1 it is necessary at the same time to indicate an appropriate m factor (see 2.2.9.1.10.4.6.4 ) toapply the summation method.
note 3: where the algal toxicity erc50(= ec50(growth rate)) falls more than 100 times below the next most sensitive species and results in a classification based solely on this effect, consideration shall be given to whetherthis toxicity is representative of the toxicity to aquatic plants. where it can be shown that this is not the case, professional judgment shall be used in deciding if classification shall be applied. classification shall be based on the erc50. in circumstances where the basis of the ec50is not specified and no erc50is recorded, classification shall be based on the lowest ec50available.
note 4: lack of rapid degradability is based on either a lack of ready biodegradability or other evidence of lack of rapid degradation. when no useful data on degradability are available, either experimentally determined or estimated data, the substance shall be regarded as not rapidly degradable.
note 5: potential to bioaccumulate, based on an experimentally derived bcf≥ 500 or, if absent, a log kow≥ 4 provided log kowis an appropriate descriptor for the bioaccumulation potential of the substance. measured log kowvalues take precedence over estimated values and measured bcf values take precedence over log kowvalues.
figure 2.2.9.1.10.3.1: categories for substances long-term hazardous to the aquatic environmentclassify
