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Calcium hydroxide

Synonyms & Trade Names
Calcium hydrate, Caustic lime, Hydrated lime, Slaked lime
CAS No.
1305-62-0
RTECS No.
EW2800000
DOT ID & Guide
Formula
Ca(OH)2
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 5 mg/m3
OSHA PEL
: TWA 15 mg/m3 (total) 5 mg/m3 (resp)
Measurement Methods

NIOSH 7020;
OSHA ID121
See: NMAM or OSHA Methods
Physical Description
White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]
MW:
74.1
BP:
Decomposes
MLT: 1076°F (Decomposes) (Loses H2O) Sol(32°F): 0.2%
VP:
0 mmHg (approx)
IP:
NA
Sp.Gr:
2.24
Fl.P:
NA
UEL:
NA
LEL:
NA
Noncombustible Solid
Incompatibilities & Reactivities
Maleic anhydride, phosphorus, nitroethane, nitromethane, nitroparaffins, nitropropane [Note: Attacks some metals.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, upper respiratory system; eye, skin burns; skin vesiculation; cough, bronchitis, pneumonitis
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0408
 
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