Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.043 mg/L
Assessment factor:
50
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.551 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.021 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.077 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:
0.006 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 in water: screening tests: Readily biodegradable (80.6% (O2 consumption) after 28 d)

Bioaccumulation: Bioaccumulation is assumed to be low based on the log Kow of -3.38.

Acute toxicity

-         to fish: LC50 (96 h) > 100 mg/L for Oryzias latipes (OECD 203)

-         to aquatic invertebrates: EC50 (48 h) 80.7 mg/L for Daphnia magna (OECD 202)

-         to aquatic algae: EC50 (72 h) 55.1 mg/L based on growth rate for Selenastrum capricornutum (OECD 201)

Chronic toxicity

-         to fish: not available

-         to aquatic invertebrates: NOEC (21 d) 2.13 mg/L for Daphnia magna (OECD 211)

-         to aquatic algae: NOEC (72 h) 17.1 mg/L based on growth rate for Selenastrum capricornutum (OECD 201)

Non-classification according to CLP

Based on the data above, aminoiminomethanesulphinic acid (CAS No. 1758-73-2) is considered to be rapidly degradable. The acute aquatic toxicity L(E)C50 values are > 1 mg/L for fish, aquatic invertebrates and algae. Valid chronic data are available with the lowest NOEC > 1 mg/L for aquatic invertebrates and algae. Therefore, aminoiminomethanesulphinic acid does not need to be classified and labeled as acute and long-term aquatic hazard according to the 2nd ATP of Regulation (EC) No. 1272/2008 (CLP).

Non-classification according to DSD

Based on the data above, aminoiminomethanesulphinic acid (CAS No. 1758-73-2) is considered to be rapidly degradable and has a low potential for bioaccumulation. The acute aquatic toxicity L(E)C50 values are > 1 mg/L for fish, aquatic invertebrates and algae. Therefore, aminoiminomethanesulphinic acid does not need to be classified and labeled as environmental hazard according to Directive 67/548/EEC.