Safety Data Sheet

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Aluminium Silicate

Non-chemically modified ores are not regulated under the EU REACH Regulation (EC) No 1907/2006. This substance does not meet the classification and labelling requirements under the EU CLP Regulation 1272/2008, nor under the UN GHS of Classification and Labelling. A SDS in therefore not mandatory. This SDS is issued for responsible care purposes.

  1. Identification of the substance /mixture and of the company/undertaking
  Substance/Preparation : Product name:  Aluminium Silicate
  Identification   Other names: Pyrophyllite; Wonderstone, Al2Si4O10(OH)2
        Registration number: Not applicable.
  Use of the : Ceramics, chemical, refractory and electrical components
  Use advised against : No known uses advised against.
  Company/Undertaking : Non EU Manufacturer’s Address
  identification 1            
        Wonderstone Limited
        Farm Gestoptefontein 349 IO
        South Africa
        Tel Number: +27 018 571 0076
        E-mail Address:
        Mine Manager: Mr. Jos Joubert
        Working Hours: Monday – Friday 06:00 to 15:30
        (GMT +2 hours)
  In case of emergency:   : Vincent Harford
  Responsible Person   Sales Manager .
  (Marketing Agent for   Wonderstone Ltd.
  Wonderstone Ltd.)   Tel:  +27 11 770-6800

Aluminium Silicate

  1. Hazards identification
Classification of preparation : Not classified as hazardous for supply
    This product does not meet the classification and labelling
    criteria given in the Regulation (EC) No 1272/2008 (CLP) based
    on presently available information.
Labelling/Pictograms: : Not applicable as the substance is not classified.
Other Hazards : Dust generation may cause eye, skin and respiratory tract
    irritation.  Refer to Section 8.
    Not a known carcinogen, mutagen or teratrogen


  1. Composition/information on hazardous ingredients

Major Component(s)/Substance(s)

Chemical CAS number Nominal % Nominal % EU CLP UN GHS
name   in the ore in the ore Regulation  
    (Grey) (Black) 1272/2008  
Al2O3 1344-28-1 29.2 32.5 Not classified Not classified
SiO2 (bound) 7631-86-9 59.0 58.2 Not classified Not classified
Fe2O3 1317-60-8 2.97 0.79 Not classified Not classified
TiO2   1.43 1.84 Not classified Not classified
K2O   1.17 0.89 Not classified Not classified
Na2O   0.26 0.22 Not classified Not classified
MnO   <0.1 <0.1 Not classified Not classified
MgO   <0.5 <0.5 Not classified Not classified
CaO   <0.1 <0.1 Not classified Not classified
P2O5   <0.14 0.2 Not classified Not classified
C   0.06 0.8 Not classified Not classified
S   <0.01 0.01 Not classified Not classified
CO2   <0.01 <0.1 Not classified Not classified
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Aluminium Silicate

Li2O in ppm   17 150 Not classified Not classified

*Several other trace elements exist, but none considered hazardous to human health or the environment.

  • Independent studies indicate variable amounts of rutile, diaspora, mica and kaolinite (Anglo Vaal Mineralogical Laboratory 2001)
  • Analysis performed in 2011 confirms that Pyrophyllite mined by Wonderstone has a free silica content of 0.908% (Dr Ansie Bruwer, Pr No. 1522574)
4. First aid measures    
Eye contact : Can cause significant eye irritation. If product gets into eyes,
      check for and remove any contact lenses. Hold eyelids apart and
      flush  immediately  with  plenty  of  clean  water  for  at  least  10
      minutes.  Seek  medical  attention  if  symptoms  persist  or  are
Skin contact : If skin contact occurs, remove contaminated clothing and shoes
      and then flush skin with mild soap and water. Clean contaminated
      shoes and clothing before re-use. If skin irritation occurs and is
      persistent, contact a doctor/physician.
Inhalation : If product is inhaled and breathing is difficult, remove exposed
      person from contaminated area to fresh air. Keep the person
      warm and at rest. If the person is not breathing, if their breathing
      is  irregular  or  if  respiratory  arrest  occurs,  provide  artificial
      respiration or oxygen by trained personnel. Maintain an open
      airway.  Loosen  tight  clothing  such  as  a  collar,  tie,  belt  or
      waistband. Contact physician urgently
Ingestion : If swallowed, rinse mouth with water.  Remove dentures if any.
      Move exposed person to fresh air. Keep exposed person warm
      and  at  rest.  If  the  exposed  person  is  conscious,  give  small
      quantities of water to drink. If vomiting occurs, the head should
      be kept low so that vomit does not enter the lungs. Get medical
      attention if symptoms persist.
Protection of First-Aiders   If first aiders are required to enter dust exposure area, respiratory
      and other PPE must be used.
Notes to physician : No specific treatment.  Treat symptomatically. Contact a poison
      treatment specialist immediately, if large quantities are ingested
      or inhaled.

Aluminium Silicate

  1. Fire-fighting measures
Suitable extinguishing media : Use an extinguishing media appropriate for fine particles that
    may arise from the material.
Special exposure hazards : The  product  is  a  non-flammable  solid.  Any  fine  suspended
arising from substance or   particles  of  dust  could  have  the  potential  to  form  explosive
preparation   mixtures with air. If there is a fire, promptly isolate the scene by
    removing all persons form the vicinity of the incident. No action
    shall be taken involving any personal risk or without suitable
Hazardous thermal : Inadequate data available
decomposition products    
Special protective equipment : Appropriate protective equipment and SCBA with a full face-
for fire-fighters   piece operated in positive pressure mode should be worn.
  1. Accidental release measures
Personal precautions : No action shall be taken involving any personal risk or without
    suitable training. Do not touch or walk through spilled material.
    Use suitable protective equipment and prevent the generation of
    dust where possible.  Wear respiratory protection equipment to
    avoid breathing dust. Remove product from ignition sources as
    all fine powders can be combustible. See Section 8.
Environmental precautions : Avoid dispersal of spilled product and limit contact with soil,
    waterways, drains and sewers as far as practically possible.
    Ensure  contaminated  run  offs  are  dealt  with  appropriately,
    according  to  approved  environmental  management  plans.  If
    possible, vacuum dry spillages, alternatively wet spilled material
    with water to reduce dust generation before and during handling.
    Avoid dust generating and handling operations where possible.
    See Section 13.
Cleaning up methods : Small spill: Vacuum or sweep up spilled product and place in an
    appropriately designated and labelled container. If disposal is
    required, this must be undertaken in accordance with local laws
    and regulations.
    Large spill: Contain product to limit the potential to enter sewers,
    water courses, basements or confined areas. Trained personnel
    can vacuum or sweep up material and place in appropriately
    designated and labelled containers.  If disposal is required, this
    must  be  undertaken  in  accordance  with  local  laws  and
    regulations.  Note:  see  Section  1  for  emergency  contact
    information and Section 13 for waste disposal.
  : Uncontaminated product can be re-used after careful cleaning.
    Any resulting  solid  waste  that  cannot  be  re-used  should  be
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Aluminium Silicate disposed of according to the local laws and regulations. Also see Directive 2008/50/EC.

  1. Handling and storage of bulk material
Handling : Wash  face,  hands  and  forearms  thoroughly  after  handling
    product. Avoid dust generating activities where possible and use
    filters and exhaust ventilation to reduce dust, especially when
    crushing.   In  the  interests  of  good  industrial  hygiene,  wear
    appropriate personal protective equipment as informed by an
    occupational  health risk  assessment.  Maintain  a  clean  work
    place to prevent dust accumulation. Recycle all waste where
    possible. If product becomes contaminated, dispose of according
    to the local laws and regulations.
Storage : Store in an area away from incompatible materials and ignition
    sources. Store separately from water, acids and any oxidizing
    agents. In powder form, store in 1 ton bulk bags sealed to avoid
    dust dispersal. Ensure containers are adequately labelled.  Use
    appropriate containment to avoid environmental contamination.
Packaging & Transport: : Conventional bulk handling techniques should be used when
    packaging  and  transporting  the  product.  Product  should  be
    covered during transport as far as possible.


  1. Exposure controls/personal protection
Exposure limit values (OELs) : OELs of key components:      
      OHSAct   OSHA   EU/UK  
    Al2O3 5mg/m3   5mg/m3   4mg/m3  
    SiO2 0.1mg/m3   0.025mg/m3   0.05mg/m3  
    Fe2O3 5mg/m3   10mg/m3   5mg/m3  
Exposure controls : The  material  is  not classified  according to  SANS  10228  as
    ‘dangerous goods’.          
    The product is also not classified in terms of REACH or UNGHS
Occupational exposure :   Dust: Reduce dust generation and dispersal through limiting
controls   manual handling. LEV and wet suppression methods for powder
    state should be used          
  • Handling: The use of protective hand gloves is recommended.

Eye Protection: It is mandatory to use safety eyewear to comply with any approved standard when a risk assessment indicates

  • this is necessary to avoid exposure to product in the eyes. (E.g. EN 166 – Europe, or SANS 1404 – South Africa).

Aluminium Silicate Respiratory Protection: Respirator selection must be based on known or anticipated exposure levels, the hazards of the product and the safe working limits of the selected respirator. In the interest of good industrial hygiene, ensure containment of gaseous/dusty material, (Gas filter: EN 136).

  1. Physical and chemical properties
Appearance Grey aluminium silicate is pale grey in colour with
  homogenous appearance whilst black aluminium silicate is
  dark grey to black rock with patches of light colours.
Size Grey aluminium silicate consists of fine grains. Black
  aluminium silicate consists of coarse grain sizes.
Odour None
pH 7.5 (Estimated value)
Density 2.68 – 2.72 g./c.c.
Boiling Point Decomposes on melting at 1 630°C
Flash Point Not applicable for this material as an inorganic substance
Melting Point Approximately1630°C
Solubility in Water Insoluble
Flammability No specific fire or explosion hazards
Exposure Properties Not known
Oxidising Properties Not known
Vapour Pressure Not applicable
Viscosity Not applicable
Organic Solvents Insoluble
Freezing Point Not applicable
Explosive properties Not applicable


  1. Stability and reactivity
Reactivity Not reactive under normal storage and handling conditions
Chemical Stability Stable under normal conditions.
Possibility of Hazardous None known.
Conditions to Avoid Avoid generating excessive fine particles and exposure to ignition
Incompatible material None known.
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Aluminium Silicate

  Hazardous decomposition None known.
  11. Toxicological information
  Toxicokinetics, metabolism : Powder is the main form of the product that may exert health
  and distribution   effects.
        Limited bio-availability expected in solid form. Its constituents are
        naturally bound but can be released individually at different rates
        and  concentrations  based  on  physical  form  (powder).  Dust
        containing respirable crystalline silica has the potential to cause
        pneumoconiosis in occupational settings.  See Section 16.
  Acute effects : Short  term  exposure  to  airborne  dust  particles  may  cause
        irritation to eyes, nose, throat and lungs.
  Sensitisation : Not a known sensitising agent.
  Chronic health effects : Long term exposure to airborne dust particles contribute to the
        development  of  bronchitis,  reduced  breathing  capacity  and
        susceptibility to occupational lung disease (pneumoconiosis)
  Carcinogenicity, Mutagenicity : Product is not known to be carcinogenic, mutagenic or reprotoxic.
  and Reproductive toxicity    
  (CMR) effects:    
  12. Ecological information
  Ecotoxicity : Aluminium Silicate is not known to have adverse effects to the
  Mobility : Not enough information is available to determine mobility in soil.
  Persistence and degradability : Not applicable to inorganic substances.
  Bioaccumulation potential : None expected.


  1. Disposal considerations – recycle if possible

Re-use of aluminium silicate is recommended. In cases where re-use is not possible, the material can be disposed of on a general landfill site according to national and local legal requirements as the material is not considered hazardous as per the Hazardous Substances Act (15 of 1973) and the Hazardous Chemical Substances Regulation (1995). Aluminium Silicate

  1. Transport information

International transport regulations Aluminium silicate is not classified an annex III hazardous material under Marpol and therefore not subject to its requirements. Responsible care with respect to discharging cargo and washing ship holds is nevertheless recommended.

Regulatory UN Proper Classes PG* Label Additional
information number shipping       information
ADR/RID Class Not Not Not Not Not Not
  regulated. regulated. regulated. regulated. regulated. regulated.
ADNR Class Not Not Not Not Not Not
  regulated. regulated. regulated. regulated. regulated. regulated.
IMDG Class Not Not Not Not Not Not
  regulated. regulated. regulated. regulated. regulated. regulated.
IATA-DGR Class Not Not Not Not Not Not
  regulated. regulated. regulated. regulated. regulated. regulated.


  1. Regulatory information

Chemical safety assessment: A chemical safety assessment is not required as the substance is unclassified. Labelling according to Directive 67/548/EEC and 1999/45/EC: Not required, however, responsible care symbols/pictograms could be used. National laws/National measures: National Environmental Management Waste Act, 2008. Department of Water Affairs and Forestry, Minimum Requirements for Waste Disposal by Landfill, Second Edition, 1998. SANS 10228, 2003: The Identification and Classification of Dangerous Goods for Transport. South African Occupational Health and Safety, 1993 (Act 85 of 1993) as amended. Occupational Health and Safety Act (1993). Hazardous Chemical Substances Regulations, 1995. Occupational Exposure Limits – Recommend Limits (South Africa, 1995). Aluminium Silicate Mine Health and Safety Act, 1996 (Act 29 of 1996) as amended. Occupational Health and Safety Act (1993), General Amendment Regulation 930, June 2003. Occupational Health and Safety Act (1993), Hazardous Chemical SubstancesRegulation1179, August 1995.

  1. Other information

Notice to reader All materials may present unknown hazards and should be used with caution. Although certain hazards are described herein, we cannot guarantee that these are the only hazards that exist. The safety of the material has only been examined for the uses described in this document. Wonderstone Ltd. urges each customer or recipient of this SDS to study it carefully and consult appropriate expertise, as necessary or appropriate, to become aware of and understand the data contained in this SDS and any hazard associated with the product. The information herein is provided in good faith and believed to be accurate as of the effective date. However, no warranty, express or implied, is given. Regulatory requirements are subject to change and may differ between various locations. It is the buyer’s/user’s responsibility to ensure that his activities comply with all federal, state, provincial or local laws. In the event of the material being re-routed to a jurisdiction other than that indicated on this SDS, regard must be made to the legal requirements prevailing in such other jurisdiction. The information presented here pertains only to the product as supplied. Since conditions for use of the product are not under the control of the manufacturer, it is the buyer’s/user’s duty to determine the conditions necessary for the safe use of this product. Due to the proliferation of sources for information such as manufacturer-specific SDSs, we are not and cannot be responsible for SDSs obtained from any source other than ourselves. If you have obtained an SDS from another source or if you are not sure that the SDS you have is current, please contact us for the most current version.

Date of issue : 04 September 2017
Version : 1  
CAS Chemical Abstracts Service  
EU European Union  
EU CLP European Union - Classification, Labelling and Packaging  
EU REACH European Union - Registration, Evaluation, Authorization and  
  Restriction of Chemicals  
LEV Local Exhaust Ventilation  
MARPOL Marine Pollution Convention  
OEL Occupational Exposure Limit  
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Aluminium Silicate

OHSA Occupational Safety and Health Administration
OHSAct Occupational Health and Safety Act (1993 - South Africa)
PPE Personal Protective Equipment
SANS South African National Standards
SCBA Self-Contained Breathing Apparatus
SDS Safety Data Sheet
UNGHS United Nations Globally Harmonised System