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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
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EC number: 216-940-1 | CAS number: 1704-62-7
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
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:
- 24.7 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:
- 250 mg/kg bw/day
- Modified dose descriptor starting point:
- NOAEC
- Value:
- 617.1 mg/m³
- Explanation for the modification of the dose descriptor starting point:
There are no adequate experimental data on the inhalation route available. Therefore, the worker-DNEL long-term for inhalation route - systemic is derived from the NOAEL of 250 mg/kg bw/day, obtained in the Subchronic Repeated Dose Toxicity Study in Wistar rats. The NOAECcorr. is calculated as follows:
- standard respiratory volume (rat) = 0.38 m³/kg (8h exposure)
- standard respiratory volume (human) = 6.7 m³/person (8h exposure)
- worker respiratory volume = 10 m³/person (8h exposure)
--> modified dose descriptor (corrected inhalatory NOAEC) = oral NOAEL/0.38 x (6.7/10) x (7 exposure days/week; rat/5 exposure days/week; worker) = 617.1 mg/m³
- AF for dose response relationship:
- 1
- Justification:
- ECHA REACH Guidance (starting point for the DNEL calculation is a NOAEL)
- AF for differences in duration of exposure:
- 2
- Justification:
- ECHA REACH Guidance
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- No allometric scaling has to be applied in case of oral to inhalation route to route extrapolation.
- AF for other interspecies differences:
- 2.5
- Justification:
- ECHA REACH Guidance
- AF for intraspecies differences:
- 5
- Justification:
- ECHA REACH Guidance
- AF for the quality of the whole database:
- 1
- Justification:
- ECHA REACH Guidance (good/standard quality of the database)
- AF for remaining uncertainties:
- 1
- Justification:
- ECHA REACH Guidance
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)
DNEL related information
Workers - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 4.9 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:
- 250 mg/kg bw/day
- Modified dose descriptor starting point:
- NOAEL
- Value:
- 488.8 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
There are no adequate experimental data on the dermal route available. Therefore, the worker-DNEL long-term for dermal route - systemic is derived from the NOAEL of 250 mg/kg bw/day, obtained in the Subchronic Repeated Dose Toxicity Study in Wistar rats. The NOAELcorr. is calculated as follows:
- absorption (oral, rat) = 100 % (default)
- absorption (dermal, rat) = 71.6 % (see also IUCLID chapter 7.1)
--> modified dose descriptor (corrected dermal NOAEL) = oral NOAEL/71.6 x 100 x (7 exposure days/week; rat/5 exposure days/week; worker) = 488.8 mg/kg bw
- AF for dose response relationship:
- 1
- Justification:
- ECHA REACH Guidance (starting point for the DNEL calculation is a NOAEL)
- AF for differences in duration of exposure:
- 2
- Justification:
- ECHA REACH Guidance
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- ECHA REACH Guidance
- AF for other interspecies differences:
- 2.5
- Justification:
- ECHA REACH Guidance
- AF for intraspecies differences:
- 5
- Justification:
- ECHA REACH Guidance
- AF for the quality of the whole database:
- 1
- Justification:
- ECHA REACH Guidance (good/standard quality of the database)
- AF for remaining uncertainties:
- 1
- Justification:
- ECHA REACH Guidance
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
General Population - Hazard via inhalation route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
General Population - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
General Population - Hazard via oral route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 1.25 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):
- 200
- Dose descriptor starting point:
- NOAEL
- Value:
- 250 mg/kg bw/day
- Modified dose descriptor starting point:
- NOAEL
- Value:
- 250 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
There are adequate experimental data on the oral route available. Therefore, the general population-DNEL long-term for oral route - systemic is derived from the NOAEL of 250 mg/kg bw/day, obtained in the Subchronic Repeated Dose Toxicity Study in Wistar rats. The NOAELcorr. is calculated as follows:
- absorption (oral, rat) = 100 % (default)
--> modified dose descriptor (corrected oral NOAEL) = oral NOAEL/100 x 100 = 250 mg/kg bw
- AF for dose response relationship:
- 1
- Justification:
- ECHA REACH Guidance (starting point for the DNEL calculation is a NOAEL)
- AF for differences in duration of exposure:
- 2
- Justification:
- ECHA REACH Guidance
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- ECHA REACH Guidance
- AF for other interspecies differences:
- 2.5
- Justification:
- ECHA REACH Guidance
- AF for intraspecies differences:
- 10
- Justification:
- ECHA REACH Guidance
- AF for the quality of the whole database:
- 1
- Justification:
- ECHA REACH Guidance (good/standard quality of the database)
- AF for remaining uncertainties:
- 1
- Justification:
- ECHA REACH Guidance
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
General Population - Hazard for the eyes
Local effects
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Additional information - General Population
In general, no exposure of the general population to the registered substance is expected.
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.
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