IPCS INCHEM Home
DIATOMACEOUS EARTH (UNCALCINED)
ICSC: 0248
Peer-Review Status: 15.03.2001 Validated
Amorphous diatomaceous earth
Diatomite, uncalcined
Diatomaceous earth, natural 
CAS #: 61790-53-2 RTECS #: VV7311000
    Formula: SiO2
Molecular mass: 60.8

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.  Fresh air, rest. Refer for medical attention. 
Skin Dry skin. Roughness.  Protective gloves.  Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.   

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
FINE WHITE POWDER. 

Physical dangers
Heating the material at high temperatures results in the formation of crystalline silica (see ICSC 0809 Cristobalite). 

Chemical dangers
 

Occupational exposure limits
MAK (inhalable fraction): 4 mg/m³; Pregnancy risk group: C; (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 mild fibrosis. See Notes. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: >2200°C
Melting point: 1710°C
Density: 2.3 g/cm³
Solubility in water: none 
 

NOTES
Literature suggests that the fibrosis may be due to crystalline contaminants.
Depending on the degree of exposure, periodic medical examination is indicated.
Another synonym is Kieselguhr. 

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
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations