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EC number: 272-745-1 | CAS number: 68910-55-4
- 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
Acute Toxicity: inhalation
Administrative data
- Endpoint:
- acute toxicity: inhalation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2013-08-29 to 2014-02-18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 014
- Report date:
- 2014
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 403 (Acute Inhalation Toxicity)
- GLP compliance:
- yes
- Limit test:
- yes
Test material
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Substance type: UVCB
- Physical state: powder
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Charles River Limited, Margate, Kent, UK
- Age at study initiation: 7-8 weeks old
- Weight at study initiation: 319-326 g for males; 227-253 g for females
- Fasting period before study: Not reported
- Housing: 5 per cage by sex in suspended, polycarbonate/polypropylene cages with stainless steel grid tops and solid bottoms
- Diet (e.g., ad libitum): SDS Rat and Mouse (modified) No. 1 Diet SQC Expanded provided ad libitum
- Water (e.g., ad libitum): Municipal water provided ad libitum
- Acclimation period: 9 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 to 23°C
- Humidity (%): 40 to 70%
- Air changes (per hr): 10 air changes per hour
- Photoperiod (hrs dark / hrs light): 12 hrs dark/ 12 hrs light
Administration / exposure
- Route of administration:
- inhalation: aerosol
- Type of inhalation exposure:
- nose only
- Vehicle:
- air
- Details on inhalation exposure:
- GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION
- Exposure apparatus: Modular snout only flow through system
- Exposure chamber volume: Not reported
- Method of holding animals in test chamber: Animals restrained in clear, tapered, polycarbonate tubes with an adjustable back-stop to prevent the animals from turning in the tubes
- Rate of air: 20 L/min
- Method of conditioning air: Not reported
- System of generating particulates/aerosols: Rotating brush generator
- Method of particle size determination: Particle size was measured by a cascade impactor located and sealed in a port in the animals’ breathing zone; particle size distribution was determined by plotting the cumulative percentage (by mass) of particles smaller than the cut point of each impactor stage against the logarithm of each stage cut point. The mass median aerodynamic diameter (MMAD) and geometric standard deviation (GSD) of the test aerosols were derived by Probit analysis.
- Treatment of exhaust air: Chamber air was exhausted via a double filter system with a fibre glass coarse prefilter and a HEPA ultimate particulate filter.
- Temperature, humidity, pressure in air chamber: 20.8 ± 0.62 ºC, 9.7 ± 1.06 %, pressure not reported
TEST ATMOSPHERE
- Brief description of analytical method used: The gravimetric exposure aerosol concentration was sampled 10 times during the exposure period from the animal's breathing zone. The test aerosols were sampled with filter media placed in a filter holder with a sampling system in place. Filters were weighed before and after sampling, and the volume of air sampled was recorded. Filter samples were collected at a target aerosol flow rate of 0.5 L/min.
- Samples taken from breathing zone: Yes
TEST ATMOSPHERE (if not tabulated)
- Particle size distribution: Particle size distribution was measured at approximately 1 hr and again at 3 hr during the 4 hr exposure period with a cascade impactor.
- MMAD (Mass median aerodynamic diameter) / GSD (Geometric st. dev.): MMAD = 3.98-3.99 µm; GSD 2.482-2.392
CLASS METHOD (if applicable)
- Rationale for the selection of the starting concentration: A target dose of 2 mg/L was selected because it was the maximum feasible aerosol concentration at a MMAD minimally above the OECD recommended limit of 4 µm. - Analytical verification of test atmosphere concentrations:
- yes
- Remarks:
- 2.17 mg/L
- Remarks on duration:
- 4 hr
- Concentrations:
- 2000 mg/m3
- No. of animals per sex per dose:
- 5 animals/sex
- Control animals:
- no
- Details on study design:
- - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Animals were observed prior to treatment, at the start of treatment, at 30 minute intervals until the end of treatment, 1 and 2 hour after treatment, and then daily. Body weights were recorded prior to treatment and on Days 1, 2, 3, 7, 10, and 14 after treatment.
- Necropsy of survivors performed: Yes
- Other examinations performed: Clinical signs of toxicity, gross pathology - Statistics:
- Not applicable
Results and discussion
Effect levels
- Sex:
- male/female
- Dose descriptor:
- LC50
- Effect level:
- > 2 170 mg/m³ air (analytical)
- Based on:
- test mat.
- Exp. duration:
- 4 h
- Remarks on result:
- other: No adverse effects observed at the highest dose tested.
- Mortality:
- No mortality was observed throughout the study.
- Clinical signs:
- other: Two males exhibited shallow breathing 60-90 minutes into exposure; all animals exhibited labored breathing 120 minutes into exposure, which continued until the end of exposure. Additional clinical signs of toxicity included stained coat, head, forelimbs,
- Body weight:
- A minimal decrease in body weight was noted in 2/10 animals on Day 1; changes in weight were considered to be normal for strain and age.
- Gross pathology:
- No notable macroscopic findings observed in any animals except one male that exhibited dark and discolored lungs. Findings from this animal were considered to be of equivocal toxicological significance and due to the test item being black color.
- Other findings:
- No other notable findings reported.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- No systemic toxicity was observed after rats were exposed to organolignite as an aerosol for 4 hrs at a concentration of 2170 mg/m3.
- Executive summary:
In an acute inhalation toxicity study, groups of Sprague-Dawley rats (5/sex) were exposed (nose only) by inhalation route to organolignite for 4 hours at nominal concentrations of 2000 mg/m3 (Charles River Laboratories, 2014). A target dose of 2000 mg/m3 was selected because it was the maximum feasible aerosol concentration at a MMAD minimally above the OECD recommended limit of 4 µm. Particles for testing were reduced in size in accordance with OECD guidelines. Animals then were observed for 14 days.
No mortality was observed throughout the study. There were no treatment related clinical signs, necropsy findings or changes in body weight. There was a minimal decrease in body weight observed in 2 animals; however, this effect was considered to be normal for this strain and age. One male exhibited dark/discolored lungs, which was due to the color of the test material. The inhalation LC50 was determined to be > 2170 mg/m3 (equivalent to 2.17 mg/L) in males and females.
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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