SDS

06/01/2015 Marble – Page 4 of 7
(TWA) of 0.5 

, a high efficiency particulate filter respirator must be worn at a minimum; however, if respirable
silica levels exceed or are likely to exceed an 8 hr TWA of 5.0 

a positive pressure, full face respirator or
equivalent is required. Respirator use must comply with applicable MSHA (42 CFR 84) or OSHA (29 CFR 1910.134 )
standards, which include provisions for a user training program, respirator inspection, repair and cleaning, respirator
fit testing, medical surveillance and other requirements.
9. Physical and chemical properties
Appearance:
Angular gray, white and tan particles ranging in size from powder to boulders.
Odor:
No odor.
PH:
Not applicable
Decomposition temperature:
Not applicable
Melting point/freezing point:
Not applicable
Initial boiling point and boiling range:
Not applicable
Flash point:
Non-combustible
Evaporation rate:
Not applicable
Flammability:
Not applicable
Upper/lower flammability or explosive limits:
Not applicable
Vapor pressure:
Not applicable
Relative density:
Not applicable
Solubility:
0
Partition coefficient: n-octanol/water.
Not applicable
Autoignition temperature:
Not applicable
Specific Gravity (H2O = 1):
2.4 - 2.85
10. Stability and reactivity
Reactivity:
Not reactive under normal use.
Chemical stability:
Stable under normal temperatures and pressures.
Possibility of hazardous reactions:
None under normal use.
Conditions to avoid (e.g., static discharge, shock or vibration):
Contact with incompatible materials should be avoided (see below). See Sections 5 and 7 for additional information.
Incompatible materials:
Silica ignites on contact with fluorine and is incompatible with acids, aluminum, ammonium salts and magnesium. Silica
reacts violently with powerful oxidizing agents such as fluorine, boron trifluoride, chlorine trifluoride, manganese
trifluoride, and oxygen difluoride yielding possible fire and/or explosions. Silica dissolves readily in hydrofluoric acid
producing a corrosive gas – silicon tetrafluoride.
Hazardous decomposition products:
Silica-containing respirable dust particles may be generated. When heated, quartz is slowly transformed into tridymite
(above 860°C/1580°F) and cristobalite (above 1470°C/2678°F). Both tridymite and cristobalite are other forms of
crystalline silica.
11. Toxicological information
Primary Routes of Exposure:
Inhalation and contact with the eyes and skin.
Symptoms related to the physical, chemical, toxicological characteristics
Inhalation:
Dusts may irritate the nose, throat and respiratory tract by mechanical abrasion. Coughing sneezing and shortness of
breath may occur.
Symptoms of silicosis caused by chronic exposure to dust may include (but are not limited to) shortness of breath,
difficulty breathing with or without exertion; coughing; diminished work capacity; diminished chest expansion; reduction
of lung volume; right heart enlargement and/or failure. Persons with silicosis have an increased risk of pulmonary
tuberculosis infection.