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EC number: 231-104-6 | CAS number: 7439-95-4
- 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

Endpoint summary
Administrative data
Description of key information
Additional information
Data for the physico-chemical properties of magnesium were provided based on studies for the following endpoints: (i) laser diffraction and dustiness testing (ii) water solubility testing according to OECD 105 (incl. modifications) and transformation dissolution testing according to OECD series 29 (iii) self heating (screening tests initiated with three samples of different particle size distribution) (iv) pyrophoric properties (tests initiated with three samples of different particle size distribution) (v) flammability in contact with water (tests initiated with seven samples of different particle size distribution) and (vi) flammability testing (tests initiated with two samples of different particle size distribution). The other endpoints are based on handbook data and/or long time experiences in handling.
It is noted here that handbook data for physico-chemical properties are considered to be from a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance" and therefore, theses data could be regarded as valid.
The results of the studies are reported in the endpoint summary as well as in the accompanying IUCLID database. Data for several endpoints were waived due to intrinsic properties of magnesium or based on the criteria as laid down in Regulation (EC) 1907/2008 (CLP) as described above.
Nevertheless, studies on flammability, pyrophoric properties, self-heating properties and flammability in contact with water were initiated at the German Federal Institute of Materials research and Testing “BAM - Bundesanstalt für Materialforschung und -prüfung” in accordance to the current valid transport regulation “UN recommendations on transport of dangerous good, manual of tests and criteria, part III”. The submitter explicitly note that the legal classification (CLP Annex VI) does not reflect the long-time experience of the magnesium industry and has doubts that magnesium powder is self-heating or/and is flammable in contact with air. During literature search no science based data could be found which support the legal classification of magnesium being self-heating or being flammable in contact with water/air.
The results of new physico-chemical testing indicate that the differentiation between the two powders “magnesium powder (pyrophoric), EC # 231-104-6, CAS # 7439-95-4” and “magnesium powder or turnings, EC # 231-104-6, CAS # -” is arbitrary since
· all tested representative magnesium powders with a D50 ≥ 40 µm are neither pyrophoric (flammable in contact with air) nor self-heating,
· all tested representative magnesium powders with aD50 < 2,000 µmare flammable Cat. 1
· the flammability in contact with water of all tested representative magnesium powders depends on the particle-size distribution of the respective magnesium powder as follows:
(i) all tested representative magnesium powders with a D50 ≥ 40 µm and < 200 µm are water-reactive Cat. 2
(ii) all tested representative magnesium powders with a D50 ≥ 200 µm < 2,000 µm are water-reactive Cat. 3
(iii) all tested representative magnesium powders with a D50 ≥ 2,000 µm but a D1 < 500 µm are water-reactive Cat 3
(iv) all tested representative magnesium powders with a D50 ≥ 2,000 µm and a D1 > 500 µm are non flammable in contact with water
Hence, a new C&L is supposed for magnesium powder as follows:
Name |
Index no. |
EINECS no. |
CAS no. |
Classification |
Labelling |
Notes |
|
|
Current entries of magnesium in Regulation (EC) 1272/2008 |
||||||
|
Magnesium powder (pyrophoric) |
012-001-00-3 |
231-104-6 |
7439-95-4 |
Water-react. 1 |
Dgr |
T |
|
Magnesium, powder or turnings |
012-002-00-9 |
231-104-6 |
‑ |
Flam. Sol 1 |
Dgr |
T |
|
One additional entry is proposed based on new test results |
||||||
|
Magnesium powder (non-pyrophoric, non-self heating): - D50 ≥ 2,000 µm but D1 < 500 µm |
|
231-104-6 |
7439-95-4 |
Flam. Sol 1 |
Dgr |
|
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