Flammability
0
Health Reactivity
1 1
S pecific
Hazard
Material Safety Data Sheet
Calcium Oxide
for
Calcium Oxide
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Section I - Identity
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Manufacturer's name and address: Ash Grove Cement Company
8900 Indian Creek Parkway
P. O. Box 25900
Overland Park, KS 66225
Emergency Telephone Number: (913) 451-8900
Information Telephone Number: (913) 451-8900
Chemical Name and Synonyms: Calcium oxide, CaO, quicklime, lime, unslaked lime
Trade Name and Synonyms: Pebble Quicklime, Cal-Max
CAS No.: 1305-78-8
Date Revised: July 2000
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Section II - Hazardous Ingredients
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CAS Number OSHA PEL ACGIH TLV
5 mg/m3 2 mg/m3
Quicklime, CaO 1305-78-8
10mg/m3
PEL =
0.05 mg/m3*
Quartz, crystalline silica 14808-60-7 % SiO2*+2
Calcium oxide may contain greater than 0.1% quartz, crystalline silica. Chronic exposure above the allowed
limit to the respirable dust of materials containing crystalline silica or quartz may cause silicosis.
*Respirable fraction
ACGIH American Conference of Governmental Industrial Hygienists
OSHA Occupational Safety and Health Administration
PEL Permissible Exposure Limit
TLV Threshold Limit Value
Ash Grove Cement Company
Calcium Oxide - Page 2
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Section III - Chemical and Physical Data
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Chemical Family: Inorganic Base Evaporation Rate: Not Applicable
Molecular Weight: 56.10
5162 oC
Boiling Point:
Melting Point: 4737慰F
Specific Gravity: 3.2-3.4
Vapor Density: (Air=1) Not Applicable
Solubility in Water: 0.131 g/100 ml at 10oC; 0.07 g/100 ml at 80oC
Appearance and Odor: White granular or powder; faint earthy odor
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Section IV - Fire and Explosion Hazard Data
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Flash Point: Not Applicable; calcium oxide is noncombustible and not explosive.
Flammable or Explosive Limits: Not Applicable LEL: Not Applicable UEL: Not Applicable
Extinguishing Media: Not Applicable
Special Fire Fighting Procedures: Calcium oxide in itself is incombustible. In contact with water,
product will hydrate evolving heat. Warning: Sufficient heat can be created during hydration to
ignite paper, wood, rags or other combustible materials. CAUTION: Saturated water solutions of
calcium oxide can have pH of 12-12.49. See Section VII for appropriate precautions.
Firefighting Media: Dry chemical, flooding quantities of water as spray, foam. For larger fires, use water
spray, fog or alcohol foam. DO NOT use carbon dioxide or halogenated extinguishing agents.
CAUTION: Saturated water solutions of hydrated lime can have pH of 12-12.49 at temperatures of 25oC or
above. See Section VII for appropriate precautions.
Unusual Fire and Explosion Hazards: Heat generated from reaction with water can start fires.
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Section V - Health Hazard Data
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Calcium Oxide can contain quartz greater than 0.1%. Chronic exposure by inhalation to respirable size
quartz dust at levels exceeding exposure limits has caused silicosis, a serious and progressive pneumoconiosis
which can be disabling and in extreme instances, lead to death. Symptoms may appear at any time, even
years after exposure has ceased. These symptoms may include shortness of breath, difficulty in breathing,
coughing, diminished work capacity, reduction of lung volume and right heart enlargement and/or failure.
The only reliable method of detecting silicosis is through a chest x-ray. Silicosis may aggravate other
chronic pulmonary conditions and may increase the risk of pulmonary tuberculosis infection. Smoking
aggravates the effects of silica exposure. The International Agency for Research in Cancer (IARC) has
determined that quartz crystalline silica is carcinogenic to humans when inhaled from occupational sources.
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Section V - Health Hazard Data - (Continued)
Ash Grove Cement Company
Calcium Oxide - Page 3
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Route(s) of Entry: Inhalation; skin; eyes; ingestion
1. Inhalation: corrosive
a. Acute exposure: Inhalation of low concentrations may cause sore throat, coughing,
choking, dyspnea, and variable symptoms of headache, dizziness, and weakness. Intense
exposures may result in tightness in the chest and delayed pulmonary edema. The solubility
of the substance allows further penetration that may continue for several days.
b. Chronic exposure: Bronchial irritation with chronic cough is common; chronic
overexposure may result in silicosis.
c. First aid: Remove from exposure; move to fresh air immediately. Keep affected person
warm and at rest. Get medical attention.
2. Skin contact: corrosive
a. Acute exposure: During prolonged skin contact the substance can penetrate the
unprotected skin slowly, producing soft, necrotic, deeply penetrating areas on contact. The
solubility allows further penetration that may continue for several days. The extent of
damage depends on duration of contact.
b. Chronic exposure: A chronic dermatitis may follow repeated contact.
c. First aid: Remove contaminated clothing and shoes immediately. Wash affected area with
soap or mild detergent and large amounts of water until no evidence of chemical remains
(approximately 15-20 minutes). In the case of chemical burns, cover the affected areas with
sterile, dry dressing. Bandage securely, but not too tightly. Get medical attention.
3. Eye contact: corrosive
a. Acute exposure: Direct contact with the solid or aqueous solutions may cause conjunctival
edema and corneal destruction which can lead to and may cause blindness.
b. Chronic exposure: Prolonged contact may cause conjunctivitis.
c. First aid: Wash eyes immediately with large amounts of water, occasionally lifting the
upper and lower lids, until no evidence of chemical remains (approximately 15-20 minutes).
Get medical attention immediately. Administration of drugs to the eyes should be performed
by qualified medical personnel.
4. Ingestion: corrosive. If ingested, consult a physician immediately.
Calcium Oxide listed as an OSHA Carcinogenic: NO By NTP: NO By IARC: N O
Quartz listed as an OSHA Carcinogen: NO By NTP: YES (Group 2A) By IARC: YES
(Group 1)
Medical conditions generally aggravated by exposure: Respiratory disorders or diseases, dermatitis or
other skin disorders may be aggravated by exposure.
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Section VI - Reactivity Data
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Stability: Reacts rapidly with water to produce heat and form calcium hydroxide. Will gradually react with
the carbon dioxide in air to form calcium carbonate; stable in absence of moisture and carbon dioxide.
Conditions to avoid: Contact with water, acids.
Incompatibility (materials to avoid): May react violently and incandescently with boric oxide, hydrogen
fluoride, phosphorous pentoxide, chlorine trifluoride, and fluorine. Reaction with halogenated compounds
may cause ignition.
Hazardous Polymerization: Will not occur.
Hazardous Decomposition or By-Products: None.
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Section VII - Precautions for Safe Handling and Use -
Ash Grove Cement Company
Calcium Oxide - Page 4
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Saturated solutions of calcium oxide ("Milk of Lime") can have pH of 12-12.49 at 25oC or above, corrosive
to unprotected skin and eyes. Such solutions may be created during fire fighting. Tight fitting goggles and
gloves, boots and other personal protective equipment (PPE) must be used to prevent skin and eye contact.
PPE resistant to permeation and penetration by lime water must be chosen.
Handling: Use protective equipment as described above in this section.
Storage: Protect product against physical damage and store in a dry place away from water or moisture.
Steps to be taken in case material is released or spilled:
Do not touch spilled material. Stop leak if possible without risk. For small spills, take up with absorbent
material and place into containers for later disposal. For small dry spills, shovel material into clean, dry
container and cover. Move containers from spill area. For large spills, dike far ahead of spill for later
disposal. Dispose of in accordance with all local, state and federal requirements. Spills should not be flushed
to surface waters or sewers.
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Section VIII - Control Measures
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Ventilation: Enclose all dusty processes; use local exhaust ventilation; use ventilation to vent dust to
collector.
Personal Protective Equipment (PPE): Use a NIOSH-approved (42 CFR 84) respirator with dust filtering
capability for protection against airborne calcium oxide.
Use gauntlet type work gloves and tight fitting goggles. Long sleeve shirts and long pants should be worn.
Protective barrier creams may be used on exposed skin surfaces.
Refer to Section VII for protection against exposure to solutions of calcium oxide.
Work/Hygienic Practices: Immediately after working with calcium oxide, workers should shower with
soap and water.
This product neither contains nor is directly manufactured with
any controlled ozone depleting substances, Class I and II.
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