Material Safety Data Sheet
For
Calcium Hydroxide
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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 hydroxide, calcium dihydroxide, Ca(OH)2, slaked lime,
hydrated lime, lime, milk of lime, carboxide, caustic lime
Trade Name and Synonyms: Snowflake, Kemilime, Slik
CAS No. 1305-62-0
Date Reviewed: July 2000
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Section II - Hazardous Ingredients and Exposure Limits
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CAS # % OSHA PEL 1994-95 ACGIH TLV
15 mg/m3 total dust 5 mg/m3
Calcium Hydroxide 1305-62-0 >1%
5 mg/m3 respirable dust
[Ca(OH)2]
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Section III - Physical/Chemical Characteristics
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Chemical Family: Inorganic Base
Molecular Weight: 74.10
Boiling Point: Decomposes to calcium oxide above 580螘C
Melting Point: (-H2O) at 580螘C; converts to calcium oxide
Vapor Pressure (mm Hg): Not Applicable
Specific Gravity: 2.24
Vapor Density: (Air=1) 0
Solubility in Water: 0.185 g/100 ml at 0螘C
0.077 g/100 ml at 100螘C
Evaporation Rate: Not Applicable
Appearance and Odor: Soft white powder; odorless
Ash Grove Cement Company
Calcium Hydroxide - Page 2
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Section IV - Fire and Explosion Hazard Data
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Flash Point (method used): Not Applicable; calcium hydroxide is noncombustible and not explosive.
Flammable or Explosive Limits: LEL: Not Applicable; UEL: Not Applicable
Extinguishing Media: Not Applicable
Special Fire Fighting Procedures: Hydrated lime is incombustible.
Firefighting Media: Dry chemical, carbon dioxide, water spray or foam. For larger fires, use water spray
or fog.
CAUTION: Saturated water solutions of hydrated lime can have pH of 12-12.49 at temperatures of 25螘C
or above. See Section VII for appropriate precautions.
Unusual Fire and Explosion Hazards: None
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Section V - Health Hazard Data
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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.
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: Lime in contact with unprotected skin can produce severe burns. Because
of the solubility of lime, further penetration is possible and it 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.
Ash Grove Cement Company
Calcium Hydroxide - Page 3
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Section V - Health Hazard Data - (Continued)
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4. Ingestion: corrosive. If ingested, consult a physician immediately.
Calcium hydroxide listed as an OSHA carcinogen: NO By NTP: NO By IARC: N O
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: Stable under normal temperatures and pressures. Calcium hydroxide will gradually absorb carbon
dioxide when exposed to air, forming calcium carbonate.
Incompatibility (materials to avoid): maleic anhydride, Nitroparaffins, nitromethane, nitroethane, and
nitropropane; all can form explosive salts with calcium hydroxide.
Phosphorous, when boiled with alkaline hydroxides, yields mixed phosphines which may ignite spontaneously
in air.
Hazardous Polymerization: Will not occur.
Water: Calcium hydroxide forms a corrosive solution, pH 12-12.49, with water at temperatures of 25螘C or
above.
Hazardous Decomposition or By-Products: When heated above 580螘C., calcium hydroxide loses water
to form calcium oxide, quicklime.
Conditions to Avoid: Not Applicable
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Section VII - Precautions for Safe Handling and Use
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Precautions for safe handling, storage, and use:
Handling: Use protective equipment as described in Section VIII.
Storing: Protect against physical damage and store in dry place away from water or moisture.
Ash Grove Cement Company
Calcium Hydroxide - Page 4
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Section VIII - Control Measures
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Respiratory Protection: Wear a NIOSH approved (42 CFR 84) respirator with dust filtering capability
for protection against airborne calcium hydroxide
Firefighting: Self-contained breathing apparatus with a full facepiece operated in pressure-demand or
positive-pressure mode.
Ventilation: Process enclosure or local exhaust ventilation. Use mechanical ventilation to vent dust to
collector.
Steps to be taken in case material is Released or Spilled: Pick up spilled powder. Avoid contact and
dusting conditions. Spills should not be flushed to surface waters or sewers. Dispose of in accordance with all
applicable local, state and federal requirements.
Protective Gloves: Gauntlet type work gloves.
Eye Protection: Tight fitting goggles.
Other Protective Equipment: Long sleeve shirt; long pants; can use protective cream on exposed skin
areas.
Work/Hygienic Practices: Immediately after working with hydrated lime, 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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