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Safety data
December 2022
borne dust. The amount of cristabolite present depends on the temperature and
length in service.
IARC has recently reviewed the animal, human, and other relevant experimental
data on silica in order to critically evaluate and classify the cancer causing
potential. Based on its review, IARC classified crystalline silica as a group 2A
carcinogen (probable human carcinogen).
The Occupational Safety and Health Administration (OSHA) permissible exposure
limit (PEL) for cristobalite is 0.05 mg/m
limit value (TLV) for cristobalite is 0.05 mg/m
Use NIOSH or MSHA approved equipment when airborne exposure limits may be
exceeded. The minimum respiratory protection recommended for given airborne
filter or cristobalite concentrations are:
Table A-2: Concentration
Concentration
0-1 fiber/cc or 0-0.05 mg/m
(the OSHA PEL)
Up to 5 fibers/cc or up to 10 times the OSHA
PEL for cristabolite
Up to 25 fibers/cc or 50 times the OSHA PEL
for cristobalite (2.5 mg/m
Greater than 25 fibers/cc or 50 times the
OSHA PEL for cristobalite (2.5 mg/m
If airborne fiber or cristobalite concentrations are not known, as minimum
protection, use NIOSH/MSHA approved half face, air purifying respirator with
HEPA filter cartridges.
Spray insulation surface lightly with water before removal to suppress airborne
dust. As water evaporates during removal, spray additional water on surfaces as
needed. Only spray enough water to suppress dust so that water does not run
onto the floor of the work area. To aid the wetting process, use a surfactant.
After RCF removal is completed, use dust suppressing cleaning methods, such as
wet sweeping or vacuuming, to clean the work area. If using dry vacuuming, the
vacuum must be equipped with HEPA filter. Do not use air blowing or dry
sweeping. Use dust suppressing components to clean up light dust.
Product packaging may contain product residue. Do not reuse except to re-ship or
return ceramic fiber products to the factory.
312
3
(respirable dust). The ACGIH threshold
3
Personal protective equipment
3
cristabolite
Optional disposable dust respirator (e.g.,
3M 9970 or equivalent)
Half face, air purifying respirator equipped
with high effiency particulate air (HEPA)
filter cartridges (e.g., 3M 6000 series with
2040 filter or equivalent).
Full face, air purifying respirator with high
3
)
particulate effiency particulate air (HEPA)
filter cartidges (e.g., 3M 7800S with 7255
filters or equivalent) or powered air
purifying respirator (PARR) equipped with
HEPA filter cartridges (e.g., 3M W32655 with
W3267 filters or equivalent).
Full face, positive pressure supplied air
3
).
respirator (e.g., 3M 7800S with W9435 hose
& W3196 low pressure regulator kit
connected to clean air supply or
equivalent).
00809-0500-4880
(respirable dust) (ACGIH 1991-92).
Emerson.com/Rosemount
Manual
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