Amorphous diatomaceous earth
Diatomite, uncalcined
Diatomaceous earth, natural
SiO2
Molecular mass: 60.8
ICSC # 0248
CAS # 61790-53-2
RTECS # VV7311000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
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In case of fire in the surroundings: all extinguishing agents allowed.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Dry skin.
Roughness.
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Protective gloves.
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Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety goggles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water.
(Extra personal protection: P1 filter respirator for inert particles.)
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Important Data
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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:
TLV (as silica amorphous): 10 mg/m3 E,I (ACGIH 2000). TLV (as silica amorphous): 3 mg/m3 E,R (ACGIH 2000).
TLV: Intended change
silica amorphous - insufficient data
MAK: 4 mg/m3 (Inhalable fraction)
Pregnancy risk group: C
(DFG 2005).
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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
, resulting in mild fibrosis
(see Notes).
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Physical
Properties
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Boiling point: >2200°C
Melting point: 1710°C
Density: 2.3
g/cm3
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Solubility in water:
none
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Environmental
Data
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N O T E S
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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.
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ADDITIONAL INFORMATION
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ICSC: 0248
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DIATOMACEOUS EARTH (UNCALCINED)
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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