Reaction products of 6-hydroxy-5-nitrosonaphthalene-2-sulfonic acid, chelated with iron (3+), sodium salts.

Endpoint summary

Description of key information

Short-term toxicity to fish: TLm (48h) > 1000 mg/l

Short-term toxitiy invertebrates: EC50 (48h) > 100 mg/l (nominal)

Toxicity to aquatic plants other than algae: ErC50 (frond number, dry weight) > 100 mg/l (A.I., nominal)

Additional information

The toxicity potential of the substance to aquatic invertebrates and to aquatic plants other than algae was evaluated and the following results were obtained:

Fish: TLm (48h) > 1000 mg/l

Daphnia: EC50 (48h) > 100mg/l (nominal).

Lemna: ErC50 (frond number, dry weight) > 100 mg/l (A.I., nominal) and NOErC (frond number, dry weight) = 100 mg/l (A.I., nominal).

Justification for classification or non classification

According to the table 4.1.0 of the CLP Regulation (EC) No. 1272/2008, a substance shall be classified as Aquatic Category Acute 1 when:

96 hr LC50 (for fish) < 1 mg/l and/or

48 hr EC50 (for crustacea) < 1 mg/l and/or

72 or 96 hr ErC (for algae or other aquatic plants) < 1 mg/l.

 

Moreover, substance for wich adequate chronic toxicity data are not available shall be classified as:

- Aquatic Chronic 1 when:

96 hr LC50 (for fish) < 1 mg/l and/or

48 hr EC50 (for crustacea) < 1 mg/l and/or

72 or 96 hr ErC (for algae or other aquatic plants) < 1 mg/l

 and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log K ow ≥ 4)

- Aquatic Chronic 2 when:

96 hr LC50 (for fish)>1 to≤10 mg/l and/or

48 hr EC50 (for crustacea)>1 to≤10 mg/land/or

72 or 96 hr ErC (for algae or other aquatic plants)>1 to≤10 mg/l

and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log K ow ≥ 4)

- Aquatic Chronic 3 when:

96 hr LC50 (for fish)>10 to≤100 mg/l and/or

48 hr EC50 (for crustacea)>10 to≤100 mg/land/or

72 or 96 hr ErC (for algae or other aquatic plants)>10 to≤100 mg/l

and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log K ow ≥ 4)

 

The substance is not readily biodegradable and the effective levels for both aquatic invertebrates and aquatic plants is higher than 100 mg/l. A classification for aquatic toxicity (acute or chronic) according to the CLP Regulation (EC) No.1272/2008, is not proposed.