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EC number: 231-166-4 | CAS number: 7440-58-6
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
- melting point : 2233°C
- boiling point : 4603°C
- relative density : 13.31
- water solubility : <0,012 mg/L
- self-ignition temperature : non available
Hafnium is an odourless metal, present in solid state at 20°C and 101.3 kPa under different forms: powder, shot, sponge, crystal bar, single crystals.
Hafnium is a gray, highly lustrous metal of hexagonal structure.
Physical and chemical properties of this substance are :
Flammability properties of Hafnium highly depend on the form and particular size of the metal:
On the basis of experience and studies presented:
hafnium powder is classified"pyr sol. cat 1"(H250: Catches fire spontaneously if exposed to air)
According to the results of the tests (method A 10, 440/2008/CEE regulation) and on the basis of expert judgment:
hafnium shot (particle size <0,8mm) and sponge are considered as highly flammable (R11) following 67/548/EEC regulation, and"flammable solid" category 1 (H 228) according to the 1272/2008/CEE regulation (CLP).
On the basis of experience and results of conducted test, Massive Hf (bars) and electrolytic crystals (particle size >0.8mm) are considered as non flammable
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