MSDS

MATERIAL SAFETY
DATA SHEET
HTH DE FILTER AID
REVISION DATE : 09/27/2010 Page 6 of 12
CRISTOBALITE (SIO2) 14464-46-1 OSHA Z3 10 mg/m3 TWA respirable Use
½ the value calculated from the
count or mass formulae for
quartz., Both concentration and
percent quartz for the application
of this limit are to be determined
from the fraction passing a size-
selector with the following
characteristics: Aerodynamic
diameter (unit density sphere): 2;
Percent passing selector: 90
Aerodynamic diameter (unit
density sphere): 2,5; Percent
passing selector: 75
Aerodynamic diameter (unit
density sphere): 3,5; Percent
passing selector: 50
Aerodynamic diameter (unit
density sphere): 5,0; Percent
passing selector: 25
Aerodynamic diameter (unit
density sphere): 10; Percent
passing selector: 0 The
measurements under this note
refer to the use of an AEC (now
NRC) instrument. The respirable
fraction of coal dust is determined
with an MRE; the figure
corresponding to that of 2.4
mg/m3 in the table for coal dust is
4.5 mg/m3., division by %SiO2+2
CRISTOBALITE (SIO2) 14464-46-1 OSHA Z3 30 mg/m3 TWA Total dust Use
½ the value calculated from the
count or mass formulae for
quartz., division by %SiO2+2
CRISTOBALITE (SIO2) 14464-46-1 ACGIH 0.025 mg/m3 TWA respirable
dust fraction Respirable fraction;
see Appendix C, paragraph C.
CRISTOBALITE (SIO2) 14464-46-1 ACGIH 0.025 mg/m3 TWA Respirable
fraction
CRISTOBALITE (SIO2) 14464-46-1 OSHA Z3
CRISTOBALITE (SIO2) 14464-46-1 OSHA Z1
QUARTZ (SIO2) 14808-60-7 OSHA Z3 8-hour time weighted average