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OCX 8800
SECTION IX. SPECIAL PRECAUTIONS
PRECAUTIONS TO BE TAKEN IN HANDLING AND STORING
General cleanliness should be followed.
The Toxicology data indicate that ceramic fiber should be handled with caution. The handling practices described
in this MSDS must be strictly followed. In particular, when handling refractory ceramic fiber in any application,
special caution should be taken to avoid unnecessary cutting and tearing of the material to minimize generation of
airborne dust.
It is recommended that full body clothing be worn to reduce the potential for skin irritation. Washable or disposable
clothing may be used. Do not take unwashed work clothing home. Work clothes should be washed separately
from other clothing. Rinse washing machine thoroughly after use. If clothing is to be laundered by someone else,
inform launderer of proper procedure. Work clothes and street clothes should be kept separate to prevent
contamination.
Product which has been in service at elevated temperatures (greater than 1800ºF/982ºC) may undergo partial
conversion to cristobalite, a form of crystalline silica. This reaction occurs at the furnace lining hot face. As a
consequence, this material becomes more friable; special caution must be taken to minimize generation of
airborne dust. The amount of cristobalite present will depend 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 OSHA permissible exposure limit (PEL for cristobalite is
0.05 mg/m3 (respirable dust). The ACGIH threshold limit value (TLV) for cristobalite is 0.05 mg/m3 (respirable
dust) (ACGIH 1991-92). Use NIOSH or MSHA approved equipment when airborne exposure limits may be
exceeded. The minimum respiratory protection recommended for given airborne fiber or cristobalite
concentrations are:
CONCENTRATION
n
0-1 fiber/cc or 0-0.05 mg/m3 cristobalite (the OSHA
PEL)
Up to 5 fibers/cc or up to 10 times the OSHAPEL for
cristobalite
Up to 25 fibers/cc or 50 times the OSHA PEL for
cristobalite (2.5 mg/m3)
Greater than 25 fibers/cc or 50 times the OSHA PEL for
cristobalite (2.5 mg/m3)
centration Personal Protective Equipment
A-18
Concentration
IM-106-880 Edición en Castellano
Personal Protective Equipment
Optional disposable dust respirator (e.g. 3M 9970 or equivalent).
Half face, air-purifying respirator equipped with high efficiency
particulate air (HEPA) filter cartridges (e.g. 3M 6000 series with
2040 filter or equivalent).
Full face, air-purifying respirator with high efficiency particulate air
(HEPA) filter cartridges (e.g. 3M 7800S with 7255 filters or
equivalent) or powered air-purifying respirator (PARR) equipped
with HEPA filter cartridges (e.g. 3M W3265S with W3267 filters or
equivalent).
Full face, positive pressure supplied air respirator (e.g. 3M 7800S
with W9435 hose &W3196 low pressure regulator kit connected
to clean air supply or equivalent).
Manual de Instrucciones
Mayo 2005
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