Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 215-114-8 | CAS number: 1303-00-0
- 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
Genetic toxicity: in vivo
Administrative data
- Endpoint:
- in vivo mammalian somatic cell study: cytogenicity / erythrocyte micronucleus
- Remarks:
- Type of genotoxicity: chromosome aberration
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- first exposure was on 7 March 1989; last exposure in June 1989
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP toxicity study conducted under the US National Toxicology Program (NTP). Study performed according to guideline OECD 474.Results reported within NTP Toxicology and Carcinogenesis Studies of Gallium Arsenide.
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 2 000
- Reference Type:
- publication
- Title:
- The in vivo erythrocyte micronucleus test: Measurement at steady state increases assay efficiency and permits integration with toxicity studies.
- Author:
- MacGregor, J T; Wehr, C M; Henika, P R; Shelby, M D
- Year:
- 1 990
- Bibliographic source:
- Fundam. Appl. Toxicol. 14, 513-522.
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 474 (Mammalian Erythrocyte Micronucleus Test)
- Deviations:
- yes
- Remarks:
- ; no positive control is reported
- Principles of method if other than guideline:
- The genetic toxicity of gallium arsenide was assessed by testing the ability of the chemical to increase the frequency of micronucleated erythrocytes in mouse peripheral blood.
- GLP compliance:
- yes
- Type of assay:
- micronucleus assay
Test material
- Reference substance name:
- gallium arsenide (Mechanically destroyed material not marketed. Particle size is fundamentally different from the coarser particles measured at the workplace.)
- IUPAC Name:
- gallium arsenide (Mechanically destroyed material not marketed. Particle size is fundamentally different from the coarser particles measured at the workplace.)
- Details on test material:
- - Name of test material (as cited in study report): gallium arsenide
- Physical state: solid, dark gray to black, fine powder
- Analytical purity: >98%
- Lot/batch No.: M051988
- Stability under test conditions: gallium arsenide was found to be stable for 2 weeks at temperatures up to 60°C when stored protected from light.
- MMAD: 0.9 - 1.3 µm
- Origin: the analytical chemistry laboratory, Midwest Research Institute (Kansas City, MO) obtained gallium arsenide from Johnson Matthey, Inc. (Ward Hill, MA) and prepared the single lot.
No further details are given.
Constituent 1
Test animals
- Species:
- mouse
- Strain:
- B6C3F1
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: mice were obtained from Simonsen Laboratories (Gilroy, CA)
- Age at study initiation: approximately 7 weeks old on the first day of the studies
- Assigned to test groups randomly: yes, under following basis: Animals were distributed randomly into groups of approximately equal initial mean body weights.
- Housing: mice were housed individually
- Diet: ad libitum; NIH-07 open formula pelleted diet
- Water: ad libitum
- Acclimation period: Animals were quarantined for 20 days.
ENVIRONMENTAL CONDITIONS
- Temperature (°C): ~23
- Humidity (%): 55 +/- 15
- Air changes: 15/hour
- Photoperiod: 12 hours dark/light cycle
No further details are given.
Administration / exposure
- Route of administration:
- inhalation: aerosol
- Vehicle:
- - Vehicle(s)/solvent(s) used: air
- Details on exposure:
- TYPE OF INHALATION EXPOSURE: whole body
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION
- Exposure apparatus: The study laboratory designed the stainless-steel inhalation exposure chambers so that uniform vapor concentrations could be maintained throughout the chambers when catch pans were in place. The total active mixing volume of each chamber was 1.7 m³.
- Method of holding animals in test chamber:
- System of generating particulates/aerosols: The gallium arsenide aerosol generation and delivery system had five basic components: a flexible-brush dust feed mechanism developed at the study laboratory, a Trost Model GEM-T air-impact mill, a cyclone separator, an aerosol charge neutraliser, and an aerosol distribution system. The flexible-brush dust feed mechanism employed a hopper into which the dry powder was poured. The hopper was reloaded with additional gallium arsenide at regular intervals throughout each day's exposure period. Aerosol passed through the charge neutraliser into the distribution line. At each chamber location, a vacuum pump drew aerosol from the distribution line into the chamber inlet, where the aerosol was further diluted with HEPA-filtered air to the appropriate concentration.
- Temperature, humidity in air chamber: 23-25°C, 55% +/- 15%
- Air change rate: 15 air changes per hour
- Method of particle size determination: The particle size distribution in each chamber was determined during pre-study testing and monthly during the 14-week study using a Mercer-style seven-stage impactor. The stages (glass coverslips lightly sprayed with silicone) were analysed by ICP/MS. The relative mass collected on each stage was analysed by probit analysis. The mass median aerodynamic particle diameter and the geometric standard deviation of the sample were estimated. The mass median aerodynamic particle diameter ranged from 0.8 to 1.6 µm.
TEST ATMOSPHERE
- Brief description of analytical method used: Chamber aerosol concentrations were monitored with real-time aerosol monitors (RAMs) that used a pulsed-lightemitting diode in combination with a silicon detector to sense light scattered over a forward angular range of 45° to 95° by particles traversing the sensing volume. The instrument responds to particles 0.1 to 20 µm in diameter; the geometric diameter of gallium arsenide aerosol approached the minimum of this range.
- Samples taken from breathing zone: no data - Duration of treatment / exposure:
- 14 weeks
- Frequency of treatment:
- 6 hours plus T90 (12 minutes) per day, 5 days per week
- Post exposure period:
- none
Doses / concentrationsopen allclose all
- Remarks:
- Doses / Concentrations:
0.1 mg/m³
Basis:
nominal conc.
- Remarks:
- Doses / Concentrations:
1.0 mg/m³
Basis:
nominal conc.
- Remarks:
- Doses / Concentrations:
10 mg/m³
Basis:
nominal conc.
- Remarks:
- Doses / Concentrations:
37 mg/m³
Basis:
nominal conc.
- Remarks:
- Doses / Concentrations:
75 mg/m³
Basis:
nominal conc.
- No. of animals per sex per dose:
- 10 male and 10 female mice were exposed to particulate aerosols of gallium arsenide.
- Control animals:
- yes, sham-exposed
- Positive control(s):
- no
Examinations
- Tissues and cell types examined:
- At the end of the 14-week study, peripheral blood samples were obtained from male and female mice.
- Details of tissue and slide preparation:
- CRITERIA FOR DOSE SELECTION: no data
TREATMENT AND SAMPLING TIMES ( in addition to information in specific fields): No further details are reported.
DETAILS OF SLIDE PREPARATION: Smears were immediately prepared and fixed in absolute methanol. The methanol-fixed slides were stained with acridine orange and coded.
METHOD OF ANALYSIS: Slides were scanned to determine the frequency of micronuclei in 2000 normochromatic erythrocytes (NCEs) in each of 9 or 10 animals per exposure group.
OTHER: A detailed discussion of this assay is presented by MacGregor et al. (1990). - Evaluation criteria:
- Statistical as well as biological factors are considered. No further details are given.
- Statistics:
- The frequency of micronucleated cells among NCEs was analysed by a statistical software package that tested for increasing trend over exposure groups with a one-tailed Cochran-Armitage trend test, followed by pairwise comparisons between each exposure group and the control group. In the presence of excess binomial variation, as detected by a binomial dispersion test, the binomial variance of the Cochran-Armitage test was adjusted upward in proportion to the excess variation. In the micronucleus test, an individual trial is considered positive if the trend test P value is less than or equal to 0.025 or if the P value for any single exposed group is less than or equal to 0.025 divided by the number of exposure groups.
Results and discussion
Test results
- Sex:
- male/female
- Genotoxicity:
- negative
- Toxicity:
- not examined
- Vehicle controls validity:
- not specified
- Negative controls validity:
- not examined
- Positive controls validity:
- not specified
- Additional information on results:
- No further details are given.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): negative
Gallium arsenide induced no increase in the frequency of micronucleated erythrocytes in peripheral blood of male or female mice exposed by inhalation for 14 weeks. - Executive summary:
Particulate gallium arsenide was evaluated for toxicity and genotoxicity in a 14 -week study in male and female B6C3F1 mice, with whole body inhalation (0.1 to 75 mg/m³) as the route of exposure.Male and female mice were examined for frequency of micronucleated NCEs.
No increases over the control frequencies were noted in mice of either gender.
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.