Amides, C18-unsatd., N-[2-(1-piperazinyl)ethyl]

Toxicological Summary

Workers - Hazard via inhalation route

Systemic effects

Long term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

14.7 mg/m³

Most sensitive endpoint:

repeated dose toxicity

Route of original study:

Oral

DNEL related information

DNEL derivation method:

other: ECETOC, applying modified ECHA defaults

Overall assessment factor (AF):

6

Modified dose descriptor starting point:

NOAEC

Value:

88.16 mg/m³

Explanation for the modification of the dose descriptor starting point:

Starting point is NOAEL 90-day rat  = 50 mg/kg bw/d for systemic toxicity. The corrected 8 hr inhalation NOAEC for workers is NOAEL (50 mg/kg) * 1.76 mg/m3 = 88.16 mg/m3.   No factor 2 route extrapolation from oral to inhalation. The substance is viscous at room temperature with bp > 300°C and a low vapour pressure ( <3 x 10-7 Pa, at 23°C). Exposure via inhalation is only possible as aerosol of an aqueous solution. If any inhalation does occur, this can only be in the form of larger droplets, as the use does not include fine spraying. Droplets will deposit mainly on upper airways, and will be subsequently swallowed following mucociliary transportation to pharynx. This results to no principal difference in absorption compared oral route.

AF for dose response relationship:

1

Justification:

No specific concerns; starting point is NOAEL.

AF for differences in duration of exposure:

2

Justification:

Default for sub-chronic to chronic

AF for interspecies differences (allometric scaling):

1

Justification:

Already included in NOAEC calculation

AF for other interspecies differences:

1

Justification:

ECETOC reported in 2010 after an extensive review that there is no justification for the suggested additional factor of 2.5, Therefore a factor of 1 has been applied. As effects are interpreted as being local and related to the route of exposure (see comments), the already applied allometric scaling already represents a worst case

AF for intraspecies differences:

3

Justification:

ECETOC reported in 2010 after an extensive scientific review that the appropriate fact for intra-species differences for workers is 3 and not 5. As the effects for which the risk assessment is made is based on a local response following an non-specific mechanism with expected inherently relative low variation between individuals, no additional factor is needed to accommodate for possible high uncertainty between individuals on the basis of possible specific sensitivities.

AF for the quality of the whole database:

1

Justification:

Available data are derived from recent, high quality and valid studies showing consistent results.

AF for remaining uncertainties:

1

Justification:

Low severity of effects at LOAEL. Quality database: recent high quality studies.

Acute/short term exposure

Hazard assessment conclusion:

low hazard (no threshold derived)

DNEL related information

Local effects

Long term exposure

Hazard assessment conclusion:

hazard unknown (no further information necessary)

Acute/short term exposure

Hazard assessment conclusion:

hazard unknown (no further information necessary)

DNEL related information

Workers - Hazard via dermal route

Systemic effects

Long term exposure

Hazard assessment conclusion:

high hazard (no threshold derived)

Most sensitive endpoint:

sensitisation (skin)

Acute/short term exposure

Hazard assessment conclusion:

no hazard identified

DNEL related information

Local effects

Long term exposure

Hazard assessment conclusion:

medium hazard (no threshold derived)

Acute/short term exposure

Hazard assessment conclusion:

medium hazard (no threshold derived)

Workers - Hazard for the eyes

Local effects

Hazard assessment conclusion:

medium hazard (no threshold derived)

Additional information - workers

For the delineation of DNELs the following exposure patterns are considered: Since no consumer uses exist for N-[2-(piperazin-1-yl) ethyl] C18- insaturated-alkylamide (common names: Reaction product with tall-oil fatty acid and aminoethylpiperazine or Fatty acids, tall-oil, low-boiling, reaction products with 1-piperazineethanamine), the only exposed population considered are workers which are expected to have infrequent and short-term exposures. However, for DNEL calculation chronic exposure conditions were assumed as worst-case scenario.

General Population - Hazard via inhalation route

Systemic effects

Long term exposure

Hazard assessment conclusion:

no hazard identified

Acute/short term exposure

Hazard assessment conclusion:

no hazard identified

DNEL related information

Local effects

Long term exposure

Hazard assessment conclusion:

no hazard identified

Acute/short term exposure

Hazard assessment conclusion:

no hazard identified

DNEL related information

General Population - Hazard via dermal route

Systemic effects

Long term exposure

Hazard assessment conclusion:

no hazard identified

Acute/short term exposure

Hazard assessment conclusion:

no hazard identified

DNEL related information

Local effects

Long term exposure

Hazard assessment conclusion:

no hazard identified

Acute/short term exposure

Hazard assessment conclusion:

no hazard identified

General Population - Hazard via oral route

Systemic effects

Long term exposure

Hazard assessment conclusion:

no hazard identified

Acute/short term exposure

Hazard assessment conclusion:

no hazard identified

DNEL related information

General Population - Hazard for the eyes

Local effects

Hazard assessment conclusion:

no hazard identified

Additional information - General Population

N-[2-(piperazin-1-yl)ethyl]C18-insaturated-alkylamide (common names: Reaction product with tall-oil fatty acid and aminoethylpiperazine or Fatty acids, tall-oil, low-boiling, reaction products with 1-piperazineethanamine) is not used in the consumer sector.

Also assessment of indirect exposure is not needed as the tonnage is not above 1000 tpa, and the substance not is classified as CMR or toxic (R48 or STOT-RE).