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TRIDYMITE
ICSC: 0807
Peer-Review Status: 10.09.1997 Validated
Crystalline silica, tridymite
Crystalline silicon dioxide, tridymite 
CAS #: 15468-32-3 RTECS #: VV7335000
 		    Formula: SiO2
Molecular mass: 60.1

TYPES OF
HAZARD /
EXPOSURE 		ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough.  Use local exhaust or breathing protection.   
Skin      
Eyes   Wear safety goggles or eye protection in combination with breathing protection.   
Ingestion      

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.   
EC Classification
 
UN Classification
 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
   

IMPORTANT DATA
Physical State; Appearance
COLOURLESS OR WHITE CRYSTALS. 

Physical dangers
 

Chemical dangers
Reacts with strong oxidants. This generates fire and explosion hazard. 

Occupational exposure limits
MAK: Carcinogen category: 1; (DFG 2005). 

Routes of exposure
The substance can be absorbed into the body by inhalation. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. 

Effects of short-term exposure
 

Effects of long-term or repeated exposure
The substance may have effects on the lungs. This may result in fibrosis (silicosis). This substance is possibly carcinogenic to humans. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 2230°C
Melting point: 1703°C
Relative density (water = 1): 2.3
Solubility in water: none  		 

NOTES
Depending on the degree of exposure, periodic medical examination is indicated. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety 		WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
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    See Also:
       Toxicological Abbreviations