7-24
IRAffinity-1
Chapter 7 Materials for Infrared Analysis
8. Exposure controls
and personal
protection
Silica, crystalline-tridymite and cristobalite mg/m
3
ACGIH TLV 0.05 (respirable particulate)
Belgium TWA 0.05
Denmark TWA 0.05
Finland TWA 0.1
France TWA 10
Germany TWA 0.15 (respirable fraction of the
aerosol)
Ireland TWA 0.4 (respirable)
Netherlands TWA 0.075 (respirable)
Sweden TWA 0.05
Switzerland TWA 0.15
USA PEL 0.5
(value calculated for quartz-
respirable dust)
Silica, crystalline-tripoli mg/m
3
ACGIH TLV 0.1
(of contained respirable
quartz)
Belgium TWA 0.1
Germany TWA 0.15
(respirable fraction of the
aerosol)
Ireland TWA 0.4 (respirable)
USA PEL See quartz Silica, amorphous-diatomaceous earth
mg/m
3
ACGIH TLV 10 (inhalable particulate)
3 (respirable particulate)
Germany TWA 4
(inhalable fraction of the
aerosol)
Ireland TWA 1.5
United Kingdom TWA 1.2 (respirable dust)
USA PEL 20 mppcf
Silica, amorphous mg/m
3
Ireland TWA 3 (respirable)
6 (total inhalable)
United Kingdom TWA 2.4 (respirable)
6 (total inhalable)
Silica, amorphous-fused mg/m
3
ACGIH TLV 0.1 (respirable particulate)
Finland TWA 5
Germany TWA 0.3
(respirable fraction of the
aerosol)
Ireland TWA 0.1 (respirable)
United Kingdom TWA 0.3 (respirable dust)
Silica, amorphous-fume mg/m
3
ACGIH TLV 2 (respirable particulate)
Germany TWA 0.3
(respirable fraction of the
aerosol)
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