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| Soapstone (containing less than 1% quartz) | CAS | ||
| 3MgO-4SiO2-H2O | RTECS VV8780000 | ||
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Synonyms & Trade Names Massive talc, Soapstone silicate, Steatite |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: TWA 6 mg/m3 (total) TWA 3 mg/m3 (resp) | ||
| OSHA PEL�: TWA 20 mppcf | |||
| IDLH 3000 mg/m3 | Conversion | ||
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Physical Description Odorless, white-gray powder. |
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MW: 379.3 |
BP: ? |
MLT: ? |
Sol: Insoluble |
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VP: 0 mmHg (approx) |
IP: NA |
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Sp.Gr: 2.7-2.8 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Noncombustible Solid | |||
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Incompatibilities & Reactivities None reported |
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Measurement Methods NIOSH 0500 |
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Personal Protection & Sanitation Skin: No recommendation Eyes: No recommendation Wash skin: No recommendation Remove: No recommendation Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Breathing: Respiratory support |
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Respirator Recommendations
NIOSH Up to 30 mg/m3: (APF = 5) Any dust and mist respirator Up to 60 mg/m3: (APF = 10) Any dust and mist respirator except single-use and quarter-mask respirators/(APF = 10) Any supplied-air respirator Up to 150 mg/m3: (APF = 25) Any powered, air-purifying respirator with a dust and mist filter Up to 300 mg/m3: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode*/(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and a high-efficiency particulate filter*/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 3000 mg/m3: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, skin and/or eye contact | |
| Symptoms Pneumoconiosis: cough, dyspnea (breathing difficulty); digital clubbing; cyanosis; basal crackles, cor pulmonale | |
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Target Organs
respiratory system, cardiovascular system |
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| See also: INTRODUCTION |