CALCIUM OXIDE
SYNONYMS:
BURNED LIME; BURNT LIME; CALCIA; CALCIUMOXID
(German); CALOXOL CP2; CALOXOL W3; CALX; CALX USTA; CALXYL; CHAUX VIVE
(French); DYNACAL; EINECS No. 215-138-9; FERTILOX; LIME; LIME, BURNED; LIME,
BURNT; LIME, UNSLAKED; OXIDO CALCICO (Spanish); OXYDE de CALCIUM (French);
OXY-GRO; PEBBLE LIME; QUICKLIME; RHENOSORB; RHENOSORB C; RHENOSORB F; SODA
LIME; UNSLAKED LIME
IDENTIFICATION:
CAS:
1305-78-8
DOT ID:
UN1910
Hazard class or Division:
8 (CORROSIVE MATERIAL)
ERG Guide:
157
Formula:
CaO
RTECS No:
EW3100000
Properties:
White, grayish or yellow
solid granules (lumps), crystals or powder. Color depends on amount of
impurities present. Odorless. Inorganic oxide. Sinks and reacts violently with
water (appears to boil), generating heat.
Uses:
In metallurgy, principally as a flux in steel
production; ; in lubricants; manufacture of aluminum and magnesium; flotation
of non-ferrous, ores; drilling fluids.
HEALTH & SAFETY INFORMATION
• IDLH:
25 mg/m
3
• OSHA Table Z-1 Air Contaminant
• Corrosive to the eyes, skin, and respiratory
tract. Inhalation of the aerosol may cause lung edema; the effects may be
delayed. Very high levels may result in death. The effects may be delayed.
Long-term exposure may cause ulceration and perforation of the nasal septum,
thickening, scaling, and cracking of the skin; brittleness and cracking of
finger nails; as well as eye irritation, lung problems, bronchitis, and
pneumonia.
Exposure Limits:
• ACGIH TLV: 2 mg/m
3
TWA
• OSHA PEL: 5 mg/m
3
TWA
• NIOSH REL: 2 mg/m
3
TWA
• DFG MAK: 5 mg/m
3
TWA
Respirator:
10 mg/m
3
:
DM (any dust and mist
respirator).
20
mg/m
3
:
DMXSQ (any dust and mist
respirator except single-use and quarter mask respirators)
P
SA (any supplied-air
respirator).
25
mg/m
3
:
SA:CF (any supplied-air
respirator operated in a continuous-flow mode)
P
PAPRHiE (any powered, air-purifying respirator with
a high-efficiency particulate filter)
P
HiEF (any air-purifying, fullfacepiece respirator
with a high-efficiency particulate filter)
P
SCBAF (any self-contained breathing apparatus with a
full facepiece)
P
SAF (any
suppliedair respirator with a full facepiece).
Emergency or
Planned Entry into Unknown Concentrations or IDLH Conditions
SCBAF:PD,PP (any
self-contained breathing apparatus that has a full facepiece and is operated in
a pressure-demand or other positivepressure mode)
P
SAF:PD,PP:ASCBA (any
suppliedair 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 breathing apparatus operated in a pressure-demand or other
positive- pressure mode).
Escape:
HiEF (any airpurifying, full-facepiece respirator
with a highefficiency particulate filter)
P
SCBAE (any appropriate escape-type, self-contained
breathing apparatus).
Reactivity:
Reacts violently with water
and steam. Incompatible with ethanol, hydrogen fluoride, acids, acid fumes,
halogens, metal halides, light metals, some oxides, boron trifluoride, chlorine
trifluoride, liquid hydrofluoric acid, phosphorus pentoxide, boric oxide,
calcium chloride mixtures, fluorine, chlorine trifluoride, and carbon dioxide.
May cause corrosion of common metals.
FIRE INFORMATION:
Not combustible, but the
heat produced when combined with water can ignite combustible materials.
Corrosive. If material or contaminated runoff enters waterways, notify
downstream users of potentially contaminated water.
Hazard Classifications:
Health Hazard (Blue)
. . . . . . . . . . . . . .
3
Flammability (Red)
. . . . . . . . . . . . . .
. 0
Reactivity (Yellow)
. . . . . . . . . . . . . .
. . 1
FIRST AID:
Move victim to fresh air.
Call emergency medical care. Apply artificial respiration if victim is not
breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance;
induce artificial respiration with the aid of a pocket mask equipped with a
one-way valve or other proper respiratory medical device. Administer oxygen if
breathing is difficult. Remove and isolate contaminated clothing and shoes. In
case of contact with substance, immediately flush skin or eyes with running
water for at least 20 minutes. For minor skin contact, avoid spreading material
on unaffected skin. Keep victim warm and quiet. Effects of exposure
(inhalation, ingestion, or skin contact) may be delayed. Ensure that medical
personnel are aware of the material(s) involved, and take precautions to
protect themselves.
ENVIRONMENTAL REGULATIONS
• California LOL: MNQ
• WHMIS, Ingredients Disclosure List (Canada): 1%