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EC number: 424-820-7 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Toxicological Summary
- Administrative data
- Workers - Hazard via inhalation route
- Workers - Hazard via dermal route
- Workers - Hazard for the eyes
- Additional information - workers
- General Population - Hazard via inhalation route
- General Population - Hazard via dermal route
- General Population - Hazard via oral route
- General Population - Hazard for the eyes
- Additional information - General Population
Administrative data
Workers - Hazard via inhalation route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 1.76 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):
- 75
- Modified dose descriptor starting point:
- NOAEC
- Value:
- 132.24 mg/m³
- Explanation for the modification of the dose descriptor starting point:
- NOAECcorr = NOAELoral*(1/0.38 m³/kg bw/day)*(ABSoral-rat/ABSinh-human)*(6.7 m³ (8h)/10 m³ (8h)) = 150 mg/kg bw/day*(1/0.38 m³/kg bw/day)*(1/2)*0.67 = 132.24 mg/m³. ABSoral-rat=oral absorption rate in rats, ABSinh-human=inhalation absorption rate in humans. 200% absorption is assumed for the inhalation route compared to the oral route in both species.
- AF for dose response relationship:
- 1
- Justification:
- DNEL is based on a NOAEL
- AF for differences in duration of exposure:
- 6
- Justification:
- DNEL is based on a 28-day study
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- AF not used for inhalation route
- AF for other interspecies differences:
- 2.5
- Justification:
- Default AF
- AF for intraspecies differences:
- 5
- Justification:
- Default AF for workers
- AF for the quality of the whole database:
- 1
- Justification:
- DNEL is based on a high-quality study
- AF for remaining uncertainties:
- 1
- Justification:
- no remaining uncertainties
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
- Route of original study:
- Dermal
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown (no further information necessary)
Acute/short term exposure
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
- Most sensitive endpoint:
- skin irritation/corrosion
DNEL related information
Workers - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.5 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):
- 300
- Modified dose descriptor starting point:
- NOAEL
- Value:
- 150 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
- NOAELcorr = NOAELoral*(ABSoral-rat/ABSdermal-human) = (150 mg/kg bw/day)*(1/1) = 150 mg/kg bw/day. It is assumed that the dermal absorption rate is 100% of that of the oral absorption according to ECHA CSA Guidance Chapter R.7c Figure R.7.12-5. ABSoral-rat=oral absorption rate in rats, ABSdermal-human=dermal absorption rate in humans.
- AF for dose response relationship:
- 1
- Justification:
- DNEL is based on a NOAEL
- AF for differences in duration of exposure:
- 6
- Justification:
- DNEL is based on a 28-day study
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- Default AF for rats
- AF for other interspecies differences:
- 2.5
- Justification:
- Default AF
- AF for intraspecies differences:
- 5
- Justification:
- Default AF for workers
- AF for the quality of the whole database:
- 1
- Justification:
- DNEL is based on a high-quality study
- AF for remaining uncertainties:
- 1
- Justification:
- no remaining uncertainties
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
- Most sensitive endpoint:
- acute toxicity
- Route of original study:
- Dermal
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
- Most sensitive endpoint:
- skin irritation/corrosion
Acute/short term exposure
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
- Most sensitive endpoint:
- skin irritation/corrosion
Workers - Hazard for the eyes
Local effects
- Hazard assessment conclusion:
- high hazard (no threshold derived)
Additional information - workers
DNELs were derived in accordance with ECHA Guidance on Information Requirements and Chemical Safety Assessment, Chapter R.8 (ECHA, 2012).
EC 424-820-7 shows lack of systemic toxicity in an EU method B.3/OECD 402 acute dermal toxicity study (LD50 >500 mg/kg), the majority of toxicity seen within this study is irritation to the skin caused by the corrosive nature of the material. EC 424-820-7 is therefore considered no hazard systemically through acute/short term dermal exposure.
EC 424-820-7 shows limited systemic toxicity in an EU Method B.1 acute oral toxicity study (LD50 >2000 mg/kg), the majority of toxicity seen within this study is local irritation to the forestomach caused by the corrosive nature of the material. EC 424-820-7 is therefore considered no hazard systemically in relation to acute/short term oral exposure.
EC 424-820-7 is considered a medium hazard for local dermal effects after long term and acute exposure due to its corrosive nature to both the skin and eyes. However, this is a precautionary statement as probably there is no activity if exposure remains below the irritancy threshold. No further investigation is deemed necessary due to a demonstrated lack of exposure.
The long term DNEL for systemic effects via the inhalation and dermal route has been derived using the 28 day repeat dose oral study conducted on the registration material. A NOAEL of 150 mg/kg/day (top dose tested) was generated for systemic toxicity based on no significant toxicological effects observed in the study.
General Population - Hazard via inhalation route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.43 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):
- 150
- Modified dose descriptor starting point:
- NOAEC
- Value:
- 65.22 mg/m³
- Explanation for the modification of the dose descriptor starting point:
- NOAECcorr = NOAELoral*(1/1.15 m³/kg bw/day)*(ABSoral-rat/ABSinh-human) = 150 mg/kg bw/day*(1/1.15 m³/kg bw/day)*(1/2) =65.22 mg/m³. It is assumed that oral absorption rate is 200% of that of inhalation absorption. ABSoral-rat=oral absorption rate in rats, ABSinh-human=inhalation absorption rate in humans.
- AF for dose response relationship:
- 1
- Justification:
- DNEL is based on a NOAEL
- AF for differences in duration of exposure:
- 6
- Justification:
- DNEL is based on a 28-day study
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- AF not used for inhalation route
- AF for other interspecies differences:
- 2.5
- Justification:
- Default AF
- AF for intraspecies differences:
- 10
- Justification:
- Default AF for general population
- AF for the quality of the whole database:
- 1
- Justification:
- DNEL is based on a high-quality study
- AF for remaining uncertainties:
- 1
- Justification:
- There are no remaining uncertainties
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
- Most sensitive endpoint:
- acute toxicity
- Route of original study:
- Dermal
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown (no further information necessary)
Acute/short term exposure
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
- Most sensitive endpoint:
- skin irritation/corrosion
DNEL related information
General Population - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.25 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):
- 600
- Modified dose descriptor starting point:
- NOAEL
- Value:
- 150 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
- NOAELcorr = NOAELoral*(ABSoral-rat/ABSdermal-human) = (150 mg/kg bw/day)*(1/1) = 150 mg/kg bw/day. It is assumed that the dermal absorption rate is 100% of that of the oral absorption according to ECHA CSA Guidance Chapter R.7c Figure R.7.12-5. ABSoral-rat=oral absorption rate in rats, ABSdermal-human=dermal absorption rate in humans.
- AF for dose response relationship:
- 1
- Justification:
- DNEL is based on a NOAEL
- AF for differences in duration of exposure:
- 6
- Justification:
- DNEL is based on a 28-day study
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- Default AF for rats
- AF for other interspecies differences:
- 2.5
- Justification:
- Default AF
- AF for intraspecies differences:
- 10
- Justification:
- Default AF for general population
- AF for the quality of the whole database:
- 1
- Justification:
- DNEL is based on a high-quality study
- AF for remaining uncertainties:
- 1
- Justification:
- no remaining uncertainties
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
- Most sensitive endpoint:
- acute toxicity
- Route of original study:
- Dermal
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
- Most sensitive endpoint:
- skin irritation/corrosion
Acute/short term exposure
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
- Most sensitive endpoint:
- skin irritation/corrosion
General Population - Hazard via oral route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.25 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):
- 600
- Modified dose descriptor starting point:
- NOAEL
- Value:
- 150 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
- no route-to-route extrapolation needed
- AF for dose response relationship:
- 1
- Justification:
- DNEL is based on a NOAEL
- AF for differences in duration of exposure:
- 6
- Justification:
- DNEL is based on a 28-day study
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- Default AF for rats
- AF for other interspecies differences:
- 2.5
- Justification:
- Default AF
- AF for intraspecies differences:
- 10
- Justification:
- Default AF for general population
- AF for the quality of the whole database:
- 1
- Justification:
- DNEL is based on a high-quality study
- AF for remaining uncertainties:
- 1
- Justification:
- no remaining uncertainties
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
- Most sensitive endpoint:
- acute toxicity
- Route of original study:
- Oral
DNEL related information
General Population - Hazard for the eyes
Local effects
- Hazard assessment conclusion:
- medium hazard (no threshold derived)
Additional information - General Population
DNELs were derived in accordance with ECHA Guidance on Information Requirements and Chemical Safety Assessment, Chapter R.8.
EC 424-820-7 shows lack of systemic toxicity in an EU method B.3/OECD 402 acute dermal toxicity study (LD50 >500 mg/kg), the majority of toxicity seen within this study is irritation to the skin caused by the corrosive nature of the material. EC 424-820-7 is therefore considered a low hazard systemically through acute/short term exposure.
EC 424-820-7 shows limited systemic toxicity in an EU Method B.1 acute oral toxicity study (LD50 >2000 mg/kg), the majority of toxicity seen within this study is local irritation to the forestomach caused by the corrosive nature of the material. EC 424-820-7 is therefore considered a low hazard systemically in relation to acute/short term oral exposure.
EC 424-820-7 is considered a medium hazard for local effects (both long term and acute) due to its corrosive nature to both the skin and eyes (H314, category 1C).
The long term DNEL for systemic effects via the oral, dermal and inhalation route has been derived using the 28 day repeat dose oral study conducted on the registration material. A NOAEL of 150 mg/kg/day (top dose tested) was generated for systemic toxicity based on no significant toxicological effects observed in the study.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.