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Safety Data Sheet
1. Identification of Substance
Product Name:Dow Corning 340 Heat Sink Compound
Address:Mintsfeet Road South, Kendal, Cumbria, LA9 6ND
Contact:Tel: 01539 722247     Fax: 01539 740067     E-mail: service@swantek.com
Emergency health and safety information is available on line at www.swantek.com.
2. Hazards Identification
Very toxic to aquatic organisms, may cause long term adverse effects in the aquatic environment.
3. Composition/Information on Ingredients
Chemical Characterisation: Silicone compound.
Hazardous Ingredients:
Name CAS No EINECS/ELINCS No Conc (% w/w) Classification
Zinc oxide 1314-13-2 215-222-5 69.0 N R50/53
4. First Aid Measures
General: No first aid should be needed.
Eye Contact:
Skin Contact:
5. Fire Fighting Measures
Suitable Extinguishing Media: Carbon dioxide, foam, dry powder or fine water spray. Water can be used to cool fire exposed containers.
Unsuitable Extinguishing Media: None known.
Hazards During Fire Fighting: None known.
Special Protective Equipment/Procedures: A self contained respirator and protective clothing should be worn. Keep containers cool with water spray until well after the fire is out. Determine the need to evacuate or isolate the area according to your local emergency plan.
Hazardous Combustion Products: Silica. Carbon oxides and traces of incompletely burned carbon compounds. Formaldehyde. Metal products.
6. Accidental Release Measures
Personal Precautions: Wear proper protective equipment.
Precautions to Protec the Environment: Prevent from spreading or entering into drains, ditches or rivers by using sand, earth or other appropriate barriers.
Methods for Cleaning Up: Scrape up and place in a container fitted with a lid. The spilled product produces an extremely slippery surface.
7. Handling and Storage
Handling: Avoid eye contact. General ventilation is recommended.
Specific Uses: Refer to technical data sheet available on request.
Unsuitable Packaging Material: None known.
Storage: Do not store with oxidising agents. Keep container closed and store away from water or moisture.
8. Exposure Controls/Personal Protection
Engineering Controls: Ventilation - Refer to Section 7.
Exposure Controls for Hazardous Components: None of the components have assigned exposure limits.
Personal Protection Equipment:
Respiratory Protection - Respiratory protection is not normally required.
Hand Protection - Gloves are not normally required.
Eye Protection - Safety glasses should be worn.
Skin Protection - Protective equipment is not normally necessary.
Hygiene Measures - Exercise good industrial hygiene practice. Wash after handling, especially before eating, drinking or smoking.
Environmental Exposure Controls - Refer to Section 6 and 12.
Additional Information - These precautions are for room temperature handling. Use at elevated temperature or aerosol/spray applications may require added precautions. For further information regarding the use of silicone in consumer aerosol applications, please refer to the guidance document regarding the use of silicone based materials in consumer aerosol applications that has been developed by the silicone industry (www.SEHSC.com) or contact the Dow Corning customer service group.
9. Physical and Chemical Properties
Form: Paste.
Colour: White.
Odour: None.
Flash Point: > 101C (Closed Cup).
Explosive Properties: No.
Specific Gravity: 2.0
Water Solubility: 0 g/l at 25C
Oxidising Properties: No.
10. Stability and Reactivity
Stability: Stable under normal usage conditions.
Conditions to Avoid: None established.
Materials to Avoid: Can react with strong oxidising agents.
Hazardous Decomposition Products: See Section 11.
11. Toxicological Information
On Contact with Eyes: May cause temporary discomfort.
On Skin Contact: No adverse effects are normally expected.
If Inhaled: No adverse effects are normally expected.
On Ingestion: No adverse effects are normally expected.
Other Health Hazard Information: Product may emit formaldehyde vapours at temperatures above 150C in the presence of air. Formaldehyde vapour is harmful by inhalation and irritating to eyes and respiratory system at breathing concentration less than one part per million (1ppm).
12. Ecological Information
Environmental Fate and Distribution: Solid material, insoluble in water.
Ecotoxicity Effects: Very toxic to aquatic organisms and may cause long term adverse effects in the aquatic environment. However, due to the physical form and water insolubility of the product the bioavailability is negligible.
Fate and Effects in Waste Water Treatment Plants: No adverse effects on bacteria are predicted.
13. Disposal Considerations
Product Disposal: This material must be disposed of as hazardous waste.
Packaging Disposal: Dispose of in accordance with local regulations.
14. Transport Information
Not subject to ADR/RID, not subject to IMDG Code, not subject to IATA regulations.
15. Regulatory Information
Labelling According to EEC Directive: Symbols: N - Dangerous for the environment.
Risk Phrases: R50/53: Very toxic to aquatic organisms, may cause long term adverse effects in the aquatic environment.
Safety Phrases: S57: Use appropriate container to avoid environmental contamination.
S60: This material and its container must be disposed of as hazardous waste.
16. Other Information
Issue Date: 20 August 2015

The responsibility to ensure safe working conditions within the workplace remains with the user. The information on this SDS is given as a guide to the precautions required to maintain a safe work environment. This product is for professional use only. Not for sale or resale to the general public. Use in applications other than those described above may give rise to risks not covered by the information on this SDS. The physical and chemical properties on this SDS are typical properties and are not a specification. Please report any errors.
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