MSDS NO. 05340
MATERIAL SAFETY DATA SHEET
Duracal铮? Cement Page 1 of 4
United States Gypsum Company Product Safety: 1 (800) 507-8899
125 South Franklin Street Version Date: February 22, 2001
Chicago, Illinois 60606-4678 Version 4
SECTION I
PRODUCT IDENTIFICATION
PRODUCT(S): Duracal铮? Cement
CHEMICAL FAMILY: Mixture of Calcium Sulfate Hemihydrate (Plaster of Paris, CaSO4鈥⒙紿2O) and Portland Cement
SECTION II
INGREDIENTS
TLV (mg/m3) PEL( mg/m3)
MATERIAL WT% CAS NUMBER
Plaster of Paris >50 10 15(T)/5(R) 26499-65-0
Portland Cement >40 10 15(T)/5(R) 65997-15-1
Crystalline Silica <5 0.1(R) 0.1(R) 14808-60-7
(T) 鈥? Total (R) 鈥? Respirable
All ingredients of this product are included in the U.S. Environmental Protection Agency鈥檚 Toxic Substances Control Act
Chemical Substance Inventory. All components of this product are included in the Canadian Domestic Substances List
(DSL) or the Canadian Non-Domestic Substances List (NDSL).
INFORMATION FOR HANDLING AND IDENTIFICATION OF CHEMICAL HAZARDS
NFPA Ratings: Health: 1 Fire: 0 Reactivity: 0 Other: N/A
HMIS Ratings: Health: 0 Fire: 0 Reactivity: 0
Personal Protection: Use eye and skin protection. Use NIOSH/MSHA-approved respiratory protection when necessary.
0 = Minimal Hazard 1 = Slight Hazard 2 = Moderate Hazard 3 = Serious Hazard 4 = Severe Hazard
SECTION III
PHYSICAL DATA
Gray powder; low odor.
Appearance and Odor:
Meltng Point: 1450掳C 鈥? decomposes
0.15%
Solubility In Water:
2.7 鈥? 3.0
Specific Gravity (H2O=1):
12
pH:
Varies. Check usage and/or product specification data for each product.
Hardening Time:
SECTION IV
FIRE AND EXPLOSION HAZARD DATA
Non-combustible.
Flash Point (Method Used):
Use extinguishing media appropriate for surrounding fire.
Extinguishing Media:
None
Special Fire Fighting Procedures:
None
Unusual Fire and Explosion Hazards:
MSDS NO. 05340
MATERIAL SAFETY DATA SHEET
Duracal铮? Cement Page 2 of 4
SECTION V
HEALTH HAZARD DATA
Both portland cement and plaster of paris are considered nuisance dusts. The primary hazard with portland cement is
its alkalinity (pH 12).
This product can release nuisance dust in handling or during use. Eye, skin, nose, throat, and upper respiratory
irritation may occur with prolonged dust exposures.
EFFECTS OF OVEREXPOSURE:
ACUTE:
EYES: Portland cement is a strongly alkaline material. Contact with eyes will cause irritation and possible corrosion
damage, burning, and corneal edema. Particulates will also cause mechanical irritation.
SKIN: When mixed with water, this material hardens and becomes very hot 鈥? sometimes quickly. DO NOT attempt to
make a cast enclosing any part of the body using this material. Failure to follow these instructions can cause severe
burns that may require surgical removal of affected tissue or amputation of limb.
Because of the high alkalinity of portland cement, burns may occur 12 to 48 hours after exposures of 1 to 6 hours.
Burns may occur without obvious pain at the time of exposure. Portland cement in dry form will not cause an alkaline
burn by itself. Direct, prolonged or repeated contact with the skin may cause irritation. Rubbing of this product against
the skin can result in abrasions. Rinse with water until free of material to avoid abrasions, then wash skin thoroughly
with soap and water. Can cause mechanical irritation to skin, especially in sensitive individuals. May dry skin.
INHALATION: Irritating and may be corrosive to respiratory tract. Inhalation of dusts from this product can irritate the
nose, throat, lungs, and upper respiratory tract. Persons subjected to large amounts of this dust will be forced to leave
area because of nuisance conditions such as coughing, sneezing and nasal irritation from dust. Labored breathing may
occur after excessive inhalation. Remove subject to fresh air. If respiratory symptoms persist (irritation, cough,
nausea, dizziness, etc.), consult physician.
INGESTION: If ingested, caustic burns may occur in the mouth, esophagus, or stomach. May be corrosive to the
digestive tract. Plaster of Paris is nontoxic, however, ingestion of a sufficient quantity could lead to mechanical
obstruction of the gut, especially the pyloric region. See Emergency and First Aid - Ingestion below.
CHRONIC:
INHALATION: Bronchitis and emphysema have been reported after many years of exposure to Portland cement.
Prolonged and repeated exposure to respirable crystalline silica can result in lung disease (i.e., Silicosis) and/or lung
cancer.
EYES: Conjunctivitis and Keratitis.
SKIN: Dermatitis.
INGESTION: Burns to esophagus and stomach.
EMERGENCY AND FIRST AID PROCEDURES:
EYES: Immediately flush eyes thoroughly with large amounts of water for 30 minutes, including under upper and lower
lids. Get medical attention immediately. Contact lenses should not be worn when working with Portland cement.
SKIN: Promptly wash thoroughly with copious amounts of water for at least 15 minutes or longer, depending on the
concentration, amount and duration of exposure. If irritation or pain persists after washing, see physician. If cement
penetrates the clothing, promptly remove the clothing and wash the skin. Wash clothing before wearing again.
INHALATION: Remove to fresh air. Leave the area of dust exposure and remain away until coughing and other
symptoms subside. Other measures are usually not necessary, however if conditions warrant, contact physician.
INGESTION: Get medical attention immediately. Portland cement is highly alkaline (pH ~12) and may cause burns to
the esophagus and stomach. The use of diluents is controversial and neutralization is contraindicated. This product
contains gypsum plaster. Plaster of Paris hardens when wetted and, if ingested, may result in obstruction of the gut,
especially the pyloric region.
TARGET ORGANS: Eyes, skin, and respiratory system.
MEDICAL CONDITIONS WHICH MAY BE AGGRAVATED: Pre-existing upper respiratory and lung diseases such as,
but not limited to, bronchitis, emphysema and asthma.
PRIMARY ROUTES OF ENTRY: Inhalation: eyes and/or skin contact, ingestion.
MSDS NO. 05340
MATERIAL SAFETY DATA SHEET
Duracal铮? Cement Page 3 of 4
CARCINOGENICITY OF INGREDIENTS:
MATERIAL IARC NTP
Crystalline Silica Group 1 Anticipated
The average concentration of respirable crystalline silica measured in USG plaster of paris was less than 0.1 Wt.%.
In June, 1997, the International Agency for Research on Cancer (IARC) classified crystalline silica (quartz and
cristobalite) as a human carcinogen. In making the overall evaluation, the IARC Working Group noted that
carcinogenicity in humans was not detected in all industrial circumstances studied. Carcinogenicity may be dependent
on inherent characteristics of the crystalline silica or on external factors affecting its biological activity or distribution of
its polymorphs.
IARC states that crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic
to humans (Group 1).
SECTION VI
REACTIVITY DATA
Stable
STABILITY:
None known
INCOMPATIBILITY:
Will not occur
HAZARDOUS POLYMERIZATION:
HAZARDOUS DECOMPOSITION: Above 1450掳C could produce CaO and SO2
SECTION VII
SPILL OR LEAK PROCEDURES
STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED:
Sweep up material from spillage into a waste container for disposal. Do not flush down drains. If washed down, may
plug drains. If already mixed with water, scrape up and place in container. Avoid dusting conditions, minimize airborne
dust. Wear appropriate protective equipment.
WASTE DISPOSAL METHOD:
This material can be disposed of as inert solid in a landfill or by other procedures which are accepted under federal,
state and local regulations. Slurry may plug drains.
SECTION VIII
SPECIAL PROTECTION INFORMATION
No TLV assigned to this mixture, see Ingredients Section. Minimize exposures in accordance with good hygiene
practice.
RESPIRATORY PROTECTION:
Not typically necessary under normal conditions of use. Provide general ventilation and local exhaust ventilation to
meet TLV requirements of individual ingredients and to control dusting conditions. Avoid creating dust. Wear a
NIOSH/MSHA-approved dust respirator in poorly ventilated areas and/or if TLV is exceeded.
VENTILATION:
Ventilate to keep exposures below TLV. General ventilation is expected to be satisfactory. Use local exhaust
ventilation if necessary to control dust.
PERSONAL PROTECTIVE EQUIPMENT:
Gloves or protective clothing are usually not necessary but may be desirable in specific work situations. Wear gloves
and protective clothing to prevent repeated or prolonged skin contact. Wear eye protection (safety glasses or goggles)
to avoid particulate irritation of the eye.
MSDS NO. 05340
MATERIAL SAFETY DATA SHEET
Duracal铮? Cement Page 4 of 4
SECTION IX
SPECIAL PRECAUTIONS
PRECAUTIONS TO BE TAKEN IN HANDLING AND STORAGE:
During handling wear the appropriate respiratory, eye and skin protection if warranted per environmental conditions.
Keep dry. Dew point conditions or other conditions causing presence of liquid will harden this material during storage.
鈭哤ARNING!
When mixed with water, this material hardens and becomes very hot 鈥? sometimes quickly. DO NOT attempt to make a
cast enclosing any part of the body using this material. Failure to follow these instructions can cause severe burns that
may require surgical removal of affected tissue or amputation of limb. Dust may cause skin, eye, nose, throat, or
respiratory irritation. Avoid dust inhalation and exposure to dust. If dusty, wear a NIOSH/MSHA-approved dust
respirator. Use proper ventilation to reduce dust exposure. Portland cement is strongly alkaline and can be corrosive
to eyes, skin, and respiratory tract. Wear eye and skin protection. If eye contact occurs, immediately flush thoroughly
with water for 15 minutes and get medical attention. Do not ingest. If ingested, call physician. Product safety
information: (800) 507-8899 or www.usg.com
KEEP OUT OF REACH OF CHILDREN.
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