1 Hameldown Road
Okehampton Devon
EX20 1UB UK
Phone +44 (0)1837 54446
Fax + 44 (0)1837 54544
Email info@microanalysis.co.uk
Web www.microanalysis.co.uk
Safety Data Sheet
1 Identification of the substance/preparation and of the company/undertaking
Identification of the product
Catalogue number(s) B1502, B1503, B1504
Product Name: Tungsten/Tin Accelerator.
Manufacturer/supplier identification
As listed above
2 Composition/information on ingredients
Chemical characterisation
Product name: Tungsten
Tungsten >70% wt
OSHA PEL(mg/m3) ACGIH TWA(mg/m3)
CAS 7440-33-7
Tin <30% wt CAS 7440-31-5
Not given
2
5 (as insoluble compound)
2(as insoluble compound)
3 Hazard identification
Eyes: May cause irritation
Skin: May cause irritation.
Inhalation: Tungsten may or may not cause transient lung damage.
Ingestion: Not available.
Medical Conditions Aggravated: Exposure to Tungsten dust or fume may aggravate chronic
respiratory disease..
Chromic Overexposure: Not known. Periodic medical examinations are recommended for
individuals regularly exposed to dust.
Acute Overexposure: Inhalation and skin effects generally occur in conjunction with exposure
to other dusts.
Carcinogenicity: None
4 First aid measures
Eye contact: Immediately wash from eyes with large amounts of water, occasionally lifting
upper and lower eye lids, for at least 15 minutes. If irritation occurs seek medical attention.
Inhalation: Remove to fresh air. If not breathing give artificial respiration. If breathing is difficult
give oxygen.
Skin Contact: Immediately wash skin with soap & water If irritation occurs seek medical
attention.
Ingestion: Seek medical attention.
5 Fire-fighting measures
Special risks
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Non-Flammable.
When tungsten burns in air, it forms Tungsten trioxide which sublimes above 750’c (1382f)
Suitable extinguishing media and instructions
Class D fire extinguishing agents, dry powder.
Firefighting Instructions: Firefighters should wear proper protective equipment and selfcontained breathing apparatus with full-face piece, operated in positive pressure mode.
6 Accidental release measures
Wear appropriate protective clothing.
Clean up spills immediately. Observing precautions in the protective equipment section. Sweep
up, then place into a suitable container for disposal. Avoid generating dusty conditions.
Ventilate area and wash spill site after material pickup is complete.
7 Handling and storage
Handling:
Avoid dust generation
Storage:
Keep container closed.
8 Exposure controls/personal protection
As appropriate to the situation and the quantity handled.
Respirator: If airborne concentration is high, a dust/mist respirator is recommended. If
concentration exceeds capacity of respirator, self-contained breathing apparatus is advised. .
Ventilation: Use general of local exhaust ventilation to keep dust levels as low.
Skin and Hand protection: Select glove appropriate for the specific operation..
Eye protection: Safety goggles recommended.
Other precautions: Not available.
9 Physical and chemical properties
Form: Grey to dark grey chips/granules.
Odour: None
Freeze-Melting temperature: Tungsten 3410c (6170f). Tin 232c (450f)
Boiling temperature: Tungsten 5900c (10652f). Tin 2770c (5018f)
Solubility in water: Insoluble
Specific Gravity:
10 Stability and Reactivity:
Chemical stability: Stable under normal conditions. Molten metal may react violently with water.
Incompatibility: Tungsten is very slightly soluble in nitric acid, sulphuric acid and aqua regia. It is
soluble in a mixture of hydrofluoric acid and nitric acid. Vigorous reaction with bromine
trifluoride. Lead oxide mixed with tungsten becomes incandescent upon heating. Tungsten
becomes incandescent in cold fluorine. Iodine pentafluoride reacts spontaneously with
tungsten with incandescence. Avoid oxidisers.
Tin is incompatible with acids, bases and oxidisors.
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Hazardous Decomposition Products: None.
Hazardous Polymerisation: None
11 Toxicological information
No data available.
Further data
12 Ecological information
Not available
13 Disposal considerations
Chemical residues are generally classified as special waste, and as such are covered by
regulations which vary according to location. Contact your local waste disposal authority for
advice, or pass to a chemical disposal company.
14 Transport information
Not regulated. (IATA, IMO & RID/ADR)
Hazard class – none
UN number – not listed
15 Regulatory information
Risk Phrases: R7-36/37/38
May case fire. Irritating to eyes, skin and respiratory system.
Safety Phrases: S7-28-38-37/39
Keep container tightly closed. After skin contact wash immediately with plenty of soap and
water. In case of insufficient ventilation wear suitable respiratory equipment. Wear suitable
gloves, eye/face protection.
16 Other information
Revision Date: 13th April 07
Reason for change: Addition of R&S phrases in section 15.
Revision number: 1
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