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EC number: 238-877-9 | CAS number: 14807-96-6
- 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
Physical and chemical properties
Talc (Mg3H2(SiO3)4)
1.Appearance
Talc is a white odourless powder at 20 degC and 101.3 kPa.
2.Melting point
Above 900°C, talc progressively loses its hydroxyl groups .Above 1050°C, talc re-crystallises into different forms of enstatite (anhydrous magnesium silicate). Talc's melting point is at 1500°C.
3.Boiling point
In accordance with column 2 of Annex VII (required in Section 7.3) of REACH Regulation 1907/2006 the study does not need to be conducted if the melting point is above 300ºC. The melting point ofTalc (Mg3H2(SiO3)4 is >900 ºC therefore the study is not required.
4.Density
2.7 -2.8
5.Vapour pressure
A QSAR method predicts the vapour pressure of this substance to be 1.48E-020 Pa at 25C.
6.Water solubility
Insoluble in water.Talc is practically insoluble in water.
Substance is predicted by QSAR method (EPI Suite v 4.1/WSKOW v1.42 ) to be slightly soluble ( 0.421 mg/l) in water.
7.Partition co-efficient
A reliable QSAR method predicts a value for the partition co-efficient (logKow) of -9.40 for this substance.
8.Hydrolysis as a function of pH
According to “ANNEX VIII- STANDARD INFORMATION REQUIREMENTS FOR SUBSTANCES MANUFACTURED OR IMPORTED IN QUANTITIES OF 10 TONNES OR MORE , study for Hydrolysis as a function of pH does not need to be conducted if:
-the substance is insoluble in water. Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions. Hydrolysis is a chemical reaction during which molecules of water (H2O) are split into hydrogen cations (H+, conventionally referred to as protons) and hydroxide anions (OH−) in the process of a chemical mechanism).
Talc (Mg3H2(SiO3)4) is almost insoluble in water.
On this basis, Talc (Mg3H2(SiO3)4) does not have a potential for Hydrolysis and Magnesium ion will not hydrolise.
9.Adsorption/desorption
The log of the adsorption coefficient (KOC) of Talc (Mg3H2(SiO3)4) was estimated to be log KOC = 1.5027 which is equal to a KOC value of 31.82 using the KOCWIN v2.00 QSAR method.
10.Dissociation constant
According to “ANNEX IX- STANDARD INFORMATION REQUIREMENTS FOR SUBSTANCES MANUFACTURED OR IMPORTED IN QUANTITIES OF 100 TONNES OR MORE, study for Dissociation constant does not need to be conducted if:
- The substance is insoluble in water.
Talc (Mg3H2(SiO3)4) is insoluble in water.
Therefore testing for Dissociation constant does not need to be performed.
11.Flammability
Talc (Mg3H2(SiO3)4 is an inorganic solid which is not combustible and is stable: Talc (Mg3H2(SiO3)4 can be used as a fire-extinguishing agent.
From the compositional description and the structural formula given, it can be concluded that this substance CAS 14807-96-6, (EINECS) 238-877-9 is not pyrophoric (will not ignite or emit flammable gases on contact with air, damp air, or water) nor does it exhibit the property of flammability (will not easily burn when ignited or contribute to the combustion of other materials). There are no functional groups or other structural alerts present that would support any concern that this substance should be classified as dangerous according to the criteria for evaluating flammability, which is furthermore confirmed by long term handling experience.
12. Flash point
Talc is the world’s softest mineral and also it is an inorganic compound (a compound of chemical elements containing no carbon atoms). Talc is inorganic substance and according “ANNEX VII - STANDARD INFORMATION REQUIREMENTS FOR SUBSTANCES MANUFACTURED OR IMPORTED IN QUANTITIES OF ONE TONNE OR MORE” the study does not need to be conducted if the substance is inorganic.
13.Explosiveness
There are no chemical groups associated with explosive properties present in the molecules.
From the compositional description and the structural formula given, it can be concluded that this substance CAS 14807-96-6 , (EINECS) 238-877-9 does not exhibit explosive properties (will not detonate or deflagrate, under conditions of excessive heating with or without confinement, impact, or friction to produce heat and or gas). There are no functional groups or other structural alerts associated with explosive properties or tendencies that would indicate that this substance will manifest explosive properties. Similarly, the calculated Oxygen Balance is less than -200 suggesting that testing need not be conducted and that a negative result can be predicted. Thus, this substance should not be classified as dangerous according to the criteria for explosivity, which is furthermore confirmed by long term handling experience.
14.Viscosity
Talc (Mg3H2(SiO3)4 is an inroganic solid substance and therefore viscosity is not applicable.
Talc (Mg3H2(SiO3)4) is solid which remains solid at temperatures significantly above room temperature.
15.Autoignition temperature
Spontaneous combustion will not occur. Talc (Mg3H2(SiO3)4 is an inert inorganic substance and does not contain any element which is capable of auto ignition.
A negative result is expected on the basis that the recommended test method (Method N.4 of the UN Transport of Dangerous Goods, Manual of Tests and Criteria, fourth revised edition, 2003 - Tremain 2010) would only give a positive result if the substance self ignited at a temperature below 400°C.
16.Oxidizing properties
From the compositional description and the structural formula given, it can be concluded that this substanceCAS 14807-96-6 , (EINECS) 238-877-9 does not exhibit oxidizing properties (will not cause or contribute to the combustion of other materials by virtue of its own inherent oxidation or reduction potential). There are no functional groups or other structural alerts present that would indicate that this substance would promote oxidation and thus should not be classified as dangerous according to the criteria for evaluating oxidizing properties. Furthermore, this is confirmed by long term handling experience.
Table Summary of physico-chemical properties
Property |
Value |
References |
Physical state |
Solid |
OSHA,2009 |
Substance type |
Inorganic |
OSHA,2009 |
Color |
white powder |
OSHA 2009 |
Molecular Weight |
379.27g/mol |
US EPA, 2011 |
Melting point |
1500°C |
ILO-ICSC, 2012
|
Vapour pressure |
1.48E-020 Pa at 25C |
USEPA, 2014 |
Water solubility |
0.421 mg/l(mg/l (calculated) <0.1mg/l |
US EPA, 2014 ILO-ICSC, 2012 |
Partition coefficient n-octanol/water (log value) |
log Kow=-9.40(calculated) |
USEPA, 2014
|
Henry Law Constant |
5.539E-029 atm-m3/mole (5.613E-024 Pa-m3/mole) |
USEPA, 2014
|
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.
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