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Administrative data

Workers - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
24.68 mg/m³
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
25
Dose descriptor starting point:
NOAEL
Value:
500 mg/kg bw/day
Modified dose descriptor starting point:
NOAEC
Value:
617.11 mg/m³
Explanation for the modification of the dose descriptor starting point:

The relevant dose descriptor selected to derive the inhalation DNEL, was the oral rat NOAEL of 500 mg/kg bw/day derived from a 90-day oral repeated dose study conducted with the read across substance, C14 -15AE7. This dose descriptor which is the starting point was corrected for route-to-route extrapolation:

[i.e., NOAEL oral rat ÷ SRvrat x (SRvhuman ÷ WSRvhuman) x (ABSoral-rat/ABSinh-human) x days per week(experimental)/days per week (human population] in accordance with REACH guidance document R.8 (‘Characterization of dose (concentration)-response for human health’) November (2012); where: NOAELoral rat = 500 mg/kg bw/d; SRvrat = 0.38 m3/kg bw; SRvhuman = 6.7 m3; WSRvhuman = 10 m3; ABSoral-rat = 50%; ABSinh-human = 100%; days per week(experimental) = 7 days; days per week (human population) = 5 days for workers) = 500 x 1/0.38 x 6.7/10 x 7/5 x 50/100 = 617.11 mg/m3]

AF for dose response relationship:
1
Justification:
starting point is a NOAEL
AF for differences in duration of exposure:
2
Justification:
sub-chronic to chronic study
AF for interspecies differences (allometric scaling):
1
Justification:
No assessment factor applied for interspecies difference - allometric (metabolic rate) scaling (rat-to-human) since this is already accounted for when obtaining the corrected NOEC
AF for other interspecies differences:
2.5
Justification:
Assessment factors for remaining non-metabolic differences
AF for intraspecies differences:
5
Justification:
Assessment factors for workers
AF for the quality of the whole database:
1
Justification:
Good quality study
AF for remaining uncertainties:
1
Justification:
No additional factors are required
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

Workers - Hazard via dermal route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
7 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
100
Dose descriptor starting point:
NOAEL
Value:
500 mg/kg bw/day
Modified dose descriptor starting point:
NOAEL
Value:
700 mg/kg bw/day
Explanation for the modification of the dose descriptor starting point:

The relevant dose descriptor selected to derive the inhalation DNEL, was the oral rat NOAEL of 500 mg/kg bw/day derived from an 90-day oral repeated dose study conducted with the read across substance, C14 -15AE7.This dose descriptor which is the starting point was corrected for route-to-route extrapolation:

[i.e., NOAEL oral rat x (ABSoral-rat/ABSderm-human) x days per week(experimental)/days per week(human population] in accordance with REACH guidance document R.8 (‘Characterization of dose (concentration)-response for human health’) November (2012); where: NOAELoral rat = 500 mg/kg bw/d; ABSoral-rat = 50%; ABSderm-human = 50%; days per week(experimental) = 7 days; days per week(human population) = 5 days for workers) = 500 x 7/5 x 50/50 = 700 mg/kg bw/day]).

AF for dose response relationship:
1
Justification:
starting point is a NOAEL
AF for differences in duration of exposure:
2
Justification:
sub-chronic to chronic study
AF for interspecies differences (allometric scaling):
4
Justification:
Assessment factor applied for interspecies difference - allometric (metabolic rate) scaling (rat-to-human)
AF for other interspecies differences:
2.5
Justification:
Assessment factor for any remaining non-metabolic differences
AF for intraspecies differences:
5
Justification:
Assessment factor for workers
AF for the quality of the whole database:
1
Justification:
Good quality study
AF for remaining uncertainties:
1
Justification:
No additional assessment factors are required
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

Workers - Hazard for the eyes

Local effects

Hazard assessment conclusion:
medium hazard (no threshold derived)

Additional information - workers

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
DNEL related information
Justification:
Assessment factor for general population
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

No DNELs for general population have been derived as no REACH-relevant consumer use has been identified. The only consumer use is as cosmetic products, which are not within the scope of REACH.