Registration Dossier
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EC number: 215-125-8 | CAS number: 1303-86-2
- 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

Additional physico-chemical information
Administrative data
Link to relevant study record(s)
Description of key information
Studies were performed according to UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1) on corrosivity to metals; and according to UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3, on the emission of flammable gases on contact with water were conducted.
The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days; however the maximum pit depth on the aluminium coupons was > 120 μm. The saturation solution of diboron trioxide was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III (according to the UN Transport of Dangerous Goods Recommendations). There were no flammable gases on contact with water.
Studies on dustiness were performed according to CIPAC method MT 171 and showed that diboron trioxide (boric oxide ABA 60 mesh) and boron oxide (ETI) were dust category 1 - nearly dust free and diboron trioxide (Boric oxide 200 mesh) was dust category 3 – dusty.
Additional information
Studies were performed according to UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1) on corrosivity to metals; and according to UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3, on the emission of flammable gases on contact with water were conducted.
The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days; however the maximum pit depth on the aluminium coupons was > 120 μm. The saturation solution of diboron trioxide was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III (according to the UN Transport of Dangerous Goods Recommendations). There were no flammable gases on contact with water.
Studies on dustiness were performed according to CIPAC method MT 171 and showed that diboron trioxide (boric oxide ABA 60 mesh) which has a particle size (d50 mm) of 0.051, and boron oxide (ETI) which has a particles size (d50 mm) of 0.44, were dust category 1 - nearly dust free. This sample represents the most representative of those placed on the market. Diboron trioxide (Boric oxide 200 mesh) which has a particles size (d50 mm) of 0.044 was dust category 3 – dusty. This sample represents the finest grade placed on the market.
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