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Safety Data Sheet
1 Identification of the substance/preparation and of the company/undertaking
Identification of the product
Catalogue number(s) B1036, B1038, B1145, & B1221
Product Name: Silver Tungstate on Magnesium Oxide
Manufacturer/supplier identification
As listed above
2 Composition/information on ingredients
Chemical characterisation
Product name: Silver Tungstate on Magnesium Oxide
Silver Tungstate
CAS 13465-93-5
Magnesium Oxide
CAS 1309-48-4
3 Hazard identification
Avoid inhalation, ingestion and contact with eyes and skin.
Wear chemical resistant goggles, face shield, gloves and clothing.
Wear NIOSH/MSHA approved respirator.
Use in a fume hood with local exhaust ventilation.
Wash thoroughly after use.
Inhalation:
Silver Tungstate: Exposure to silver compounds at concentrations above the threshold limit
value can result in agyria, a greyish pigmentation of the mucous membranes. Irritation of the
mucous membranes can occur.
Magnesium Oxide: Exposure to Magnesium Oxide at concentrations above the threshold limit
value may result in irritation of the respiratory tract. In the form of magnesium fume, it produces
classic symptoms of metal fume fever.
Ingestion:
Silver Tungstate: Silver compounds are toxic by ingestion. Data suggests that all major organs
would be affected.
Magnesium Oxide: May cause rapid evacuation of the bowels.
Skin Contact:
Silver Tungstate: Silver compounds may be irritating to the skin. Silver salts are absorbed into
the bloodstream through unbroken skin.
Magnesium Oxide: May cause irritation to the skin.
Eye contact:
Silver Tungstate: Silver compounds are highly irritating to the eyes and can cause destruction
of the eye tissue.
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Magnesium Oxide: May cause irritation to the eyes.
Chronic Exposure
Silver Tungstate: Generalised agyria can result from chronic overexposure to silver
compounds. This results in widespread grey pigmentation of the skin, eyes and nails. Chronic
bronchitis can result from prolonged or repeated overexposure to airborne silver compounds.
Magnesium Oxide: No data found.
Aggravation of Pre-existing Conditions: Consult a physician prior to assigning workers with
respiratory or skin disorders to tasks involving the use of silver tungstate on magnesium oxide.
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.
Inhalation: Remove to fresh air. If not breathing give artificial respiration. If breathing is difficult
give oxygen.
Skin Contact: Immediately wash skin with copious amounts of water.
Ingestion: Wash out mouth if conscious with water. Seek medical attention.
5 Fire-fighting measures
Special risks
Non-Flammable.
Suitable extinguishing media and instructions
As appropriate to surrounding fire.
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. Do not breathe dust. Avoid contact with skin, eyes and clothing. Avoid
prolonged or repeated exposure. Wash thoroughly after handling.
Storage:
Keep container closed. Store in a cool dry place.
8 Exposure controls/personal protection
As appropriate to the situation and the quantity handled.
Respirator: NIOSH/MSHA approved. .
Ventilation: Use general of local exhaust ventilation to keep dust levels low.
Skin and Hand protection: Select glove appropriate for the specific operation..
Eye Protection: Safety goggles/face shield.
Other precautions: Not available.
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9 Physical and chemical properties
Form: Purple to white granules/flakes
Odour: None
10 Stability and Reactivity:
Chemical stability: Stable
Violent or explosive reactions have been reported when silver salts or magnesium oxide are
brought into contact with the following materials:
Silver Tungstate : - Acetylene, nitromethane, and strong reducing agents.
Magnesium Oxide : - Chlorine trifluoride, phosphorous pentachloride.
Hazardous Decomposition Products: Not known.
Hazardous Polymerisation: will not occur.
11 Toxicological information
RTECS Number : Silver Tungstate : No data found
Magnesium Oxide: OM3850000
Toxicity Data:
Silver Tungstate: No data found
Magnesium Oxide: TDLo intratracheal (hamster) : 480mg/kg
Tumorigenic data cited.
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
Substance
Threshold Limit Value
Soluble silver compounds:
0.01mg/m3 TWA
Magnesium Oxide Fumes:
10mg/m3 TWA
16 Other information
Revision Date: 24th March 2003
Revision number: 0 (First Issue)
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