Calcium oxide
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CAS
1305-78-8
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CaO
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RTECS
EW3100000
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Synonyms & Trade Names
Burned lime, Burnt lime, Lime, Pebble lime, Quick lime, Unslaked lime
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DOT ID & Guide
1910 / 157
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Exposure
Limits
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NIOSH REL: TWA 2 mg/m3
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OSHA PEL: TWA 5 mg/m3
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IDLH
25 mg/m3
See: 1305788
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Conversion
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Physical Description
White or gray, odorless lumps or granular powder.
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MW: 56.1
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BP: 5162°F
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MLT: 4662°F
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Sol: Reacts
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VP: 0 mmHg (approx)
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IP: NA
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Sp.Gr: 3.34
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Fl.P: NA
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UEL: NA
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LEL: NA
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Noncombustible Solid, but will support combustion by liberation of oxygen.
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Incompatibilities & Reactivities
Water (liberates heat), fluorine, ethanol [Note: Reacts with water to form calcium hydroxide.]
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Measurement Methods
NIOSH 7020, 7303; OSHA ID121
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH
Up to 10 mg/m3:
(APF = 5) Any quarter-mask respirator. Click here for information on selection of N, R, or P filters.
Up to 20 mg/m3:
(APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The following filters may also be used: N99, R99, P99, N100, R100, P100. Click here for information on selection of N, R, or P filters.
(APF = 10) Any supplied-air respirator
Up to 25 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 25) Any powered, air-purifying respirator with a high-efficiency particulate filter
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
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 an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, upper respiratory tract; ulcer, perforation nasal septum; pneumonitis; dermatitis
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Target Organs
Eyes, skin, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0409 |
