Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Workers - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
1.7 mg/m³
DNEL related information
Explanation for the modification of the dose descriptor starting point:

The EU introduced a SCOEL for manganese and inorganic manganese compounds in July 2011: The 8h TWA is 0.2 mg/m3 for the inhalable fraction. The SCOEL recommendation covers highly soluble compounds such the sulphate as well as those of moderate (carbonate) or low solubility (oxides).

 

The SCOEL is used to derive the DNEL for long-term systemic effects upon inhalation for Pigment Red 48:4(Mn). Considering the molecular weight of 473 g/mol for the pigment and of 54.9 g/mol for Mn, a factor is applied to account for the fact, that the major part of the pigment is the organic anion: → (473.75 (MW test substance) * 0.2 mg/m3) / 54.9 (MW manganese) = 1.7 mg/m3

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:
0.57 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Dermal
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
35
Dose descriptor starting point:
NOAEL
Value:
50 mg/kg bw/day
Modified dose descriptor starting point:
NOAEL
Value:
20 mg/kg bw/day
Explanation for the modification of the dose descriptor starting point:

A dermal carcinogenicity study is available (Carson, 1984), meaning no additional factor is introduced for route-to-route extrapolation. An additional factor of 2.5 is to be applied because mice were only exposed two applications per week (5 days / 2 days = 2.5): 50 / 2.5 = 20 mg/kg bw/day

AF for dose response relationship:
1
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, for the dose-response relationship, consideration should be given to the uncertainties in the dose descriptor (NOAEL, benchmark dose…) as the surrogate for the true no-adverse-effect-level (NAEL). In this case the starting point for the DNEL calculation is a NOAEL, derived from a study which is of good quality and without uncertainties. Therefore the default assessment factor, as a standard procedure, is 1.
AF for differences in duration of exposure:
1
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, a factor allowing for differences in the experimental exposure duration and the duration of exposure for the worker and scenario under consideration needs to be considered taking into account that a) in general the experimental NOAEL will decrease with increasing exposure times and b) other and more serious adverse effects may appear with increasing exposure times. Consequently, to end up with the most conservative DNEL for repeated dose toxicity, chronic exposure is the ‘worst case’. As a chronic toxicity study is available, an assessment factor of 1 is to be applied.
AF for interspecies differences (allometric scaling):
7
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, as long as route-to-route extrapolation is not needed, allometric scaling should not be applied in cases where doses in experimental animal studies are expressed as concentrations (e.g. in mg/m3 air, ppm in diet, or mg/L in the drinking water) as these are assumed to be already scaled according to the allometric principle, since ventilation rate and food intake directly depend on the basal metabolic rate. The starting point for the DNEL is a NOAEL derived from a mice study. Therefore the default assessment factor of 7 is to be applied as a standard procedure.
AF for other interspecies differences:
1
Justification:
In accordance with ECETOC Derivation of Assessment Factors for Human Health Risk Assessment – Technical Report No. 86 and ECETOC Guidance on Assessment Factors to Derive a DNEL – Technical Report No. 110, potential differences in biological sensitivity between species are largely accounted for in the default assessment factor proposed for intraspecies variability.
AF for intraspecies differences:
5
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, humans differ in sensitivity to toxic insult due to a multitude of biological factors such as genetic polymorphism affecting e.g. toxicokinetics/metabolism, age, gender, health status and nutritional status. These differences can be the result of genetic and/or environmental influences. This intraspecies variation is greater in humans than in the more inbred experimental animal population. It is recognised that in order to always cover the most sensitive person exposed to any chemical would require a very large default assessment factor. That is of course not workable and it is usually assumed that a default assessment factor of 10 is sufficient to protect the larger part of the population, including e.g. children and the elderly. For threshold effects, this factor of 10 is the standard procedure, as a default, when assessing exposure to the general population. For workers, as standard procedure for threshold effects a default assessment factor of 5 is to be used, based on the fact that this sub population does not cover the very young, the very old, and the very ill.
AF for the quality of the whole database:
1
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, the evaluation of the total toxicological database should include an assessment whether the available information as a whole meets the tonnage driven data requirements necessary to fulfil the REACH requirements, or whether there are data gaps (completeness of the database). Furthermore, the hazard data should be assessed for the reliability and consistency across different studies and endpoints and taking into account the quality of the testing method, size and power of the study design, biological plausibility, dose-response relationships and statistical association (adequacy of the database). When taking into account the standard information requirements and the completeness and consistency of the database the default assessment factor of 1, to be applied for good/standard quality of the database, is recommended.
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:
no hazard identified

Additional information - workers

General Population - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
0.3 mg/m³
DNEL related information
Explanation for the modification of the dose descriptor starting point:

The EU introduced a SCOEL for manganese and inorganic manganese compounds in July 2011: The 8h TWA is 0.2 mg/m3 for the inhalable fraction. The SCOEL recommendation covers highly soluble compounds such the sulphate as well as those of moderate (carbonate) or low solubility (oxides).

 

The SCOEL is used to derive the DNEL for long-term systemic effects upon inhalation for Pigment Red 48:4(Mn). Considering the molecular weight of 473 g/mol for the pigment and of 54.9 g/mol for Mn, a factor is applied to account for the fact, that the major part of the pigment is the organic anion:→ (473.75 (MW test substance) * 0.2 mg/m3) / 54.9 (MW manganese) = 1.7 mg/m3

Additionally, since this SCOEL is based on occupational hazard (workers), a correction for relevant exposure duration is applied. The SCOEL is divided by the respiratory volume (6.7/10) as to light activity for workers and multiplied to correct for daily exposure (8 h exposure / 24 h exposure); 5 days exposure / 7 days exposure): 1.7 / (6.7/10) * (8/24) * (5/7) = 0.6 mg/m3.

Also, to cover the more susceptible such as the very young, the very old and the very ill, an additional factor of 2 is taken into consideration (assessment factor of 10 for general population / assessment factor of 5 for workers = 2): 0.6 / 2 = 0.3 mg/m3.

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:
DNEL (Derived No Effect Level)
Value:
0.2 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Dermal
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
70
Dose descriptor starting point:
NOAEL
Value:
50 mg/kg bw/day
Modified dose descriptor starting point:
NOAEL
Value:
14.3 mg/kg bw/day
Explanation for the modification of the dose descriptor starting point:

A dermal carcinogenicity study is available (Carson, 1984), meaning no additional factor is introduced for route-to-route extrapolation. An additional factor of 3.5 is to be applied because mice were only exposed two applications per week (7 days / 2 days = 3.5): 50 / 3.5 = 14.3 mg/kg bw/day

AF for dose response relationship:
1
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, for the dose-response relationship, consideration should be given to the uncertainties in the dose descriptor (NOAEL, benchmark dose…) as the surrogate for the true no-adverse-effect-level (NAEL). In this case the starting point for the DNEL calculation is a NOAEL, derived from a study which is of good quality and without uncertainties. Therefore the default assessment factor, as a standard procedure, is 1.
AF for differences in duration of exposure:
1
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, a factor allowing for differences in the experimental exposure duration and the duration of exposure for the worker and scenario under consideration needs to be considered taking into account that a) in general the experimental NOAEL will decrease with increasing exposure times and b) other and more serious adverse effects may appear with increasing exposure times. Consequently, to end up with the most conservative DNEL for repeated dose toxicity, chronic exposure is the ‘worst case’. As a chronic toxicity study is available, an assessment factor of 1 is to be applied.
AF for interspecies differences (allometric scaling):
7
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, as long as route-to-route extrapolation is not needed, allometric scaling should not be applied in cases where doses in experimental animal studies are expressed as concentrations (e.g. in mg/m3 air, ppm in diet, or mg/L in the drinking water) as these are assumed to be already scaled according to the allometric principle, since ventilation rate and food intake directly depend on the basal metabolic rate. The starting point for the DNEL is a NOAEL derived from a mice study. Therefore the default assessment factor of 7 is to be applied as a standard procedure.
AF for other interspecies differences:
1
Justification:
In accordance with ECETOC Derivation of Assessment Factors for Human Health Risk Assessment – Technical Report No. 86 and ECETOC Guidance on Assessment Factors to Derive a DNEL – Technical Report No. 110, potential differences in biological sensitivity between species are largely accounted for in the default assessment factor proposed for intraspecies variability.
AF for intraspecies differences:
10
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, humans differ in sensitivity to toxic insult due to a multitude of biological factors such as genetic polymorphism affecting e.g. toxicokinetics/metabolism, age, gender, health status and nutritional status. These differences can be the result of genetic and/or environmental influences. This intraspecies variation is greater in humans than in the more inbred experimental animal population. It is recognised that in order to always cover the most sensitive person exposed to any chemical would require a very large default assessment factor. That is of course not workable and it is usually assumed that a default assessment factor of 10 is sufficient to protect the larger part of the population, including e.g. children and the elderly. For threshold effects, this factor of 10 is the standard procedure, as a default, when assessing exposure to the general population. For workers, as standard procedure for threshold effects a default assessment factor of 5 is to be used, based on the fact that this sub population does not cover the very young, the very old, and the very ill.
AF for the quality of the whole database:
1
Justification:
In accordance with ECHA Guidance on information requirements and chemical safety assessment – Chapter 8: Characterisation of dose [concentration]-response for human health, the evaluation of the total toxicological database should include an assessment whether the available information as a whole meets the tonnage driven data requirements necessary to fulfil the REACH requirements, or whether there are data gaps (completeness of the database). Furthermore, the hazard data should be assessed for the reliability and consistency across different studies and endpoints and taking into account the quality of the testing method, size and power of the study design, biological plausibility, dose-response relationships and statistical association (adequacy of the database). When taking into account the standard information requirements and the completeness and consistency of the database the default assessment factor of 1, to be applied for good/standard quality of the database, is recommended.
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:
other toxicological threshold
Value:
0.6 mg/kg bw/day
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