Inhaled dust

Care must be taken not to inhale dust from the seeds as they contain a poisonous protein the grinding should therefore be carried out in a fume-cupboard. 

RESPIRABLE DUST That fraction of total inhalable dust which penetrates to the gas exchange region of the lung (usually considered to be in the range 0.5 /xm-7 /xm). 

TOTAL INHALABLE DUST Airbome material capable of entering the nose and mouth during breathing and hence available for deposition in the respiratory tract. 

Silane, see Silicon tetrahydride Silica, Amorphous Total inhalable dust Respirable dust Precipitated... 

Titanium dioxide - 10 " - - - inhalable dust) 4 (respirable dust) - - ... 

The lack of limits should not be taken to imply an absence of hazard. In the absence of a specific OEL for a particular dust, exposure should be adequately controlled and where there is no indication of the need for a lower value, personal exposure should be kept below both 10 mg/m 8 hr TWA total inhalable dust and 4 mg/m 8 hr TWA respirable dust. 

General methods for sampling and gravimetric analysis of respirable and inhalable dust... 

The next most important factor to consider when assessing dust clouds is the actual amount of dust present. This is known as the concentration, and is defined as follows. A substantial concentration of dust should be taken as concentration of lOmg/m 8-hour time-weighted average of total inhalable dust or 5 mg/m 8-hour time-weighted average of respirable dust where there is no indication... 

RESPIRABLE DUST That fraction of total inhalable dust which penetrates to the gas exchange region of the lung. 

X) 10 (total inhalable dust) 5 (respirable dust) 5 (fume, respirable dust) 10 (total inhalable dust) 1250 2250 10 ... 

Polytelrafluoroethylene decomposition products Polyvinyl chloride Total inhalable dust Kespirable dust Portland cement Potassium hydroxide Propane... 

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