MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 1 of 8
USG Gypsum Plaster Retarder for Lime Based Products
CGC Inc.
Product Safety: 1 (800) 507-8899
350 Burnhamthorpe Rd. W., 5th Floor
www.usg.com
Mississauga, Ontario L5B 3J1
Version Date: October 8, 2006
(905) 803-5600 Fax (905) 803-5688
Version: 4
A Subsidiary of USG Corporation
SECTION 1
CHEMICAL PRODUCT AND IDENTIFICATION
USG Gypsum Plaster Retarder for Lime Based Products
PRODUCT(S)
Plaster of paris
CHEMICAL FAMILY
Calcium sulfate hemihydrate (CaSO4鈥⒙紿2O)
SYNONYMS
SECTION 2
HAZARD IDENTIFICATION
EMERGENCY OVERVIEW: This product is not expected to produce any unusual hazards during normal use. Exposure
to high dust levels may irritate the skin, eyes, nose, throat, or upper respiratory tract. 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.
POTENTIAL HEALTH EFFECTS
ACUTE :
Exposure to dust generated during the handling of the product may irritate eyes, skin, nose, throat, and
upper respiratory tract. Persons subjected to large amounts of this dust will be forced to leave area
Inhalation because of nuisance conditions such as coughing, sneezing and nasal irritation. Labored breathing may
occur after excessive inhalation. If respiratory symptoms persist, consult physician.
Dust can cause mechanical irritation of eyes. If burning, redness, itching, pain or other symptoms persist
Eyes
or develop, consult physician.
When mixed with water, this material hardens and becomes very hot 鈥? sometimes quickly. DO NOT
attempt to make a cost 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
Skin
limb. Direct, prolonged or repeated contact with the skin may cause irritation. Rinse with water until skin is
free of material to avoid irritation, then wash skin thoroughly with mild soap and water. Repeated
exposure may dry skin.
Unlikely to occur, but if ingested may cause gastric disturbances if swallowed due to plaster of paris
content of the product. Plaster of paris is non-toxic, however, ingestion of a sufficient quantity could lead
Ingestion
to mechanical obstruction of the gut, especially the pyloric region. See First Aid Measures 鈥? Ingestion
(Section 4).
CHRONIC:
Testing of dust from USG plaster of paris has not detected respirable crystalline silica. Exposures to
respirable crystalline silica from the plaster of paris content are not expected during the normal use of this
product; however, actual levels must be determined by workplace hygiene testing. The weight percent of
Inhalation respirable crystalline silica has not been measured in this product. Prolonged and repeated exposure to
airborne free respirable crystalline silica can result in lung disease (i.e., silicosis) and/or lung cancer. The
development of silicosis may increase the risks of additional health effects. The risk of developing
silicosis is dependent upon the exposure intensity and duration.
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 2 of 8
USG Gypsum Plaster Retarder for Lime Based Products
Eyes None known.
Repeated contact may dry the skin, causing cracking or dermatitis. Sensitive individuals may develop an
Skin
allergic dermatitis.
Ingestion None known.
TARGET ORGANS: Eyes, skin and respiratory system.
PRIMARY ROUTES OF ENTRY: Inhalation, eyes and skin contact.
SECTION 3
COMPOSITION, INFORMATION ON INGREDIENTS
TLV
PEL( mg/m3)
MATERIAL WT% CAS #
(mg/m3)
Plaster of Paris (CaSO4鈥⒙紿2O) >60 10 15(T)/5(R) 26499-65-0
Crystalline Silica <1 0.025(R) 0.1(R) 14808-60-7
Potassium Bitartrate >40 (NE) (NE) 868-14-4
All ingredients of this product are included in the U.S. Environmental Protection Agency鈥檚 Toxic Substances Control Act
Chemical Substance Inventory and the Canadian Domestic Substances List (DSL).
Testing of dust from USG plaster of paris has not detected respirable crystalline silica. Respirable crystalline silica:
IARC: Group 1 carcinogen, NTP: Known human carcinogen. The weight percent of crystalline silica given represents
total quartz and not the respirable fraction. The weight percent of respirable silica has not been measured inthis product.
Food and Drug Administration [CFR Title 21, v.3, sec 184.1230] 鈥? Calcium Sulfate is Generally Recognized as Safe
(GRAS).
SECTION 4
FIRST AID MEASURES
FIRST AID PROCEDURES
Remove to fresh air. Leave the area of exposure and remain away until coughing and other symptoms
Inhalation
subside. Other measures are usually not necessary, however if conditions warrant, contact physician.
To prevent mechanical irritation, flush thoroughly with water for 15 minutes. If irritation persists, consult
Eyes
physician.
To prevent the drying effect of plaster of paris, wash with mild soap and water. A commercially available
Skin hand lotion may be used to treat dry skin areas. If skin has become cracked, take appropriate action to
prevent infection and promote healing. If irritation persists, consult physician.
Plaster of paris hardens and, if ingested, may result in obstruction of the gut, especially the pyloric
Ingestion
region. Drinking gelatin solutions or large volumes of water may delay setting.
MEDICAL CONDITIONS WHICH MAY BE AGGRAVATED: Pre-existing upper respiratory and lung diseases such as,
but not limited to, bronchitis, emphysema and asthma. Pre-existing skin diseases such as, but not limited to, rashes and
dermatitis.
NOTES TO PHYSICIAN: Treatment should be directed at control of symptoms and the clinical condition.
SECTION 5
FIRE FIGHTING MEASURES
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 3 of 8
USG Gypsum Plaster Retarder for Lime Based Products
Not expected to burn.
General Fire Hazards
Water or use extinguishing media appropriate for surrounding fire.
Extinguishing Media
Wear appropriate personal protective equipment (See section 8).
Special Fire Fighting Procedures
None.
Unusual Fire and Explosion Hazards
Above 1450潞 C - decomposes to calcium oxide (CaO) and sulfur
Hazardous Combustion Products
dioxide (SO2).
None Known Not Applicable
Flash Point Auto Ignition
Not Applicable
Method Used
Not Applicable
Flammability Classification
Not Applicable
Upper Flammable Limit (UFL)
Not Applicable Not Applicable
Lower Flammable Limit (LFL) Rate of Burning
SECTION 6
ACCIDENTAL RELEASE MEASURES
CONTAINMENT: No special precautions. Wear appropriate personal protective equipment (See section 8).
CLEAN-UP: Use normal clean up procedures. If dry, shovel or sweep up material from spillage and place collected
material into a container for recovery or waste disposal. Avoid dust generation. Avoid inhalation of dust and contact
with eyes and skin. Wear appropriate protective equipment. Maintain proper ventilation. If vacuum is used to collect
dust, use an industrial vacuum cleaner with a high efficiency air filter. If sweeping is necessary, use dust suppressant.
Do not use compressed air for clean up. These procedures will help minimize potential exposures. If washed down,
may plug drains. If already mixed with water, scrape up and place in container.
DISPOSAL: Trace amounts of residue can be flushed to a drain, using plenty of water.
SECTION 7
HANDLING AND STORAGE
HANDLING: Avoid dust contact with eyes. Wear the appropriate eye protection against dust (See Section 8).Minimize
dust generation and accumulation. Avoid breathing dust. Wear the appropriate respiratory protection against dust in
poorly ventilated areas and if TLV is exceeded (see Sections 2 and 8). Use good safety and industrial hygiene
practices.
STORAGE: Store in a cool, dry, ventilated area away from sources of heat, moisture and incompatibilities (see Section
10). As a dry powder, dew point conditions or other conditions causing presence of liquid will harden plaster of paris
during storage.
SECTION 8
EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS: Provide ventilation sufficient to control airborne dust levels.If user operations generate
airborne dust, use ventilation to keep dust concentrations below permissible exposure limits (See Section 2).Where
general ventilation is inadequate, use process enclosures, local exhaust ventilation, or other engineering controls to
control dust levels below permissible exposure limits (see Section 2). If engineering controls are not possible, wear a
properlyfitted NIOSH/MSHA-approved particulate respirator.
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 4 of 8
USG Gypsum Plaster Retarder for Lime Based Products
RESPIRATORY PROTECTION: Wear a NIOSH/MSHA-approved respirator equipped with particulate cartridges when
dusty in poorly ventilated areas, and if TLV is exceeded. A respiratory program that meets OSHA's 29 CFR 1910.134
and ANSI Z88.2 requirements must be followed whenever workplace conditions warrant a respirator's use.
OTHER PERSONAL PROTECTIVE EQUIPMENT:
Eye/Face Wear eye protection (safety glasses or goggles) to avoid possible eye irritation.
Wear gloves and protective clothing to prevent repeated or prolonged skin contact. Barrier creams or skin
Skin
lotion may be applied to face, neck, wrist and hands when skin is exposed to help prevent drying of skin.
Selection of Personal Protective Equipment will depend on environmental working conditions and
General
operations.
SECTION 9
PHYSICAL AND CHEMICAL PROPERTIES
White to off white Not Applicable
Appearance Vapor Density (Air = 1)
Low to no odor 2
Odor Specific Gravity (H2O = 1)
Not Applicable 0.2%
Odor Threshold Solubility (H2O)
Solid (powder) Not Known
Physical State Partition Coefficient
~3 Not Known
pH @ 25 潞 C Auto-ignition Temperature
Not Applicable 1450 潞C
Melting Point Decomposition Temperature
Not Applicable Not Known
Freezing Point Viscosity
Not Applicable Not Known
Boiling Point Particle Size
Not Known Not Known
Flash Point Bulk Density
Not Applicable Mixture
Evaporation Rate (BuAc = 1) Molecular Weight
Not Known None
Upper Flammable Limit (UFL) VOC Content
Not Known None
Lower Flammable Limit (LFL) Percent Volatile
Not Applicable
Vapor Pressure (mm Hg)
SECTION 10
CHEMICAL STABILITY AND REACTIVITY
Stable in dry environments. Dew point conditions or other conditions causing presence of
STABILITY
liquid will harden this material.
Contact with acids, water, high humidity, and incompatibles.
CONDITIONS TO AVOID
Acids. Exposure to water and acids must be supervised because the reactions are
INCOMPATIBILITY
vigorous and produce large amounts of heat.
HAZARDOUS
Will not occur.
POLYMERIZATION
HAZARDOUS
Above 1450潞 C - calcium oxide (CaO) and sulfur dioxide SO2
DECOMPOSITION
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 5 of 8
USG Gypsum Plaster Retarder for Lime Based Products
SECTION 11
TOXICOLOGICAL INFORMATION
ACUTE EFFECTS: The sulfate ion has caused gastro-intestinal disturbance in humans following large oral
doses.Limited studies involving the repeated inhalation of an (unspecified) calcium sulfate failed to identify any particular
target organs in monkeys, rats and hamsters.No evidence of mutagenicity was found in Ames bacterial tests.Plaster of
paris: Oral LD50 rat > 5000 mg/kg; Dermal LD50 鈥? None Determined; Skin Irritation LD50 鈥? None Determined; Eye
Irritation LD50鈥? None Determined
CHRONIC EFFECTS / CARCINOGENICITY: Crystalline silica: Testing of dust from USG plaster of paris has not
detected respirable crystalline silica. Exposures to respirable crystalline silica are not expected during the normal use of
this product; however, actual levels must be determined by workplace hygiene testing. The weight percent of respirable
crystalline silica has not been measured in this product.Prolonged and repeated exposure to airborne free respirable
crystalline silica can result in lung disease (i.e., silicosis) and/or lung cancer. The development of silicosis may increase
the risks of additional health effects. The risk of developing silicosis is dependent upon the exposure intensity and
duration.
In June, 1997, 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 12
ECOLOGICAL INFORMATION
ENVIRONMENTAL TOXICITY: This product has no known adverse effect on ecology.
Not Determined.
Ecotoxicity value
SECTION 13
DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: Dispose of material in accordance with federal, state, and local regulations. Never
discharge directly into sewers or surface waters. Consult with environmental regulatory agencies for guidance on
acceptable disposal practices. Slurry may plug drains.
SECTION 14
TRANSPORT INFORMATION
U.S. DOT INFORMATION: Not a hazardous material per DOT shipping requirements. Not classified or regulated.
Same as product name.
Shipping Name
Not classified.
Hazard Class
None. Not classified.
UN/NA #
None.
Packing Group
Not applicable.
Label (s) Required
Not classified.
GGVSec/MDG-Code
Not applicable.
ICAO/IATA-DGR
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 6 of 8
USG Gypsum Plaster Retarder for Lime Based Products
None.
RID/ADR
None.
ADNR
SECTION 15
REGULATORY INFORMATION
UNITED STATES REGULATIONS
All ingredients of this product are included in the U.S. Environmental Protection Agency鈥檚 Toxic Substances Control Act
Chemical Substance Inventory.
CERCLA
Sec. 112
RCRA
Code
302 304 313
MATERIAL WT%
CAA
Plaster of Paris (CaSO4鈥⒙紿2O) >60 NL NL NL NL NL NL
Crystalline Silica <1 NL NL NL NL NL NL
NL NL NL NL NL NL
Potassium Bitartrate >40
Key : NL = Not Listed
SARA Title III Section 302 (EPCRA) Extremely Hazardous Substances: Threshold Planning Quantity (TPQ)
SARA Title III Section 304 (EPCRA) Extremely Hazardous Substances: Reportable Quantity (RQ)
SARA Title III Section 313 (EPCRA) Toxic Chemicals: X= Subject to reporting under section 313
CERCLA Hazardous Substances: Reportable Quantity (RQ)
CAA Section 112 (r) Regulated Chemicals for Accidental Release Prevention: Threshold Quantities(TQ)
RCRA Hazardous Waste: RCRA hazardous waste code
CANADIAN REGULATIONS
This product has been classified in accordance with the hazard criteria of Controlled Product regulations and the MSDS
contains all the information required by the Controlled Products Regulations. All ingredients of this product are included
in the Canadian Domestic Substances List (DSL).
WT% IDL Item # WHMIS Classification:
Plaster of Paris (CaSO4鈥⒙紿2O) >60 Not Listed Not Listed
Crystalline Silica <1 1406 D2A
Potassium Bitartrate >40 Not Listed Not Listed
IDL Item#: Canadian Hazardous Products Act 鈥? Ingredient Disclosure List Item #
WHMIS Classification: Workplace Hazardous Material Information System
CARCINOGENICITY CLASSIFICATION OF INGREDIENT(S) All substances listed are associated with the nature of the
raw materials used in the manufacture of this product and are not independent components of the product formulation.
All substances, if present, are at levels well below regulatory limits. See Section 11 : Toxicology Information for detailed
information
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 7 of 8
USG Gypsum Plaster Retarder for Lime Based Products
MATERIAL IARC NTP ACGIH CAL- 65
Respirable Crystalline 1 1 A2 Listed
Silica
See Section 11 : Toxicology Information for detailed information
IARC 鈥? International Agency for Research on Cancer (World Health Organization)
1- Carcinogenic to humans
2A 鈥? Probably carcinogenic to humans
2B 鈥? Possibly carcinogenic to humans
3 - Not classifiable as a carcinogen
4 鈥? Probably not a carcinogen
NTP 鈥? National Toxicology Program (Health and Human Services Dept., Public Health Service, NIH/NIEHS)
1- Known to be carcinogen
2- Anticipated to be carcinogens
ACGIH 鈥? American Conference of Governmental Industrial Hygienists
A1 鈥? Confirmed human carcinogen
A2 鈥? Suspected human carcinogen
A3 鈥? Animal carcinogen
A4 - Not classifiable as a carcinogen
A5 鈥? Not suspected as a human carcinogen
CAL-65 鈥? California Proposition 65 鈥淐hemicals known to the State of California to Cause Cancer鈥?
SECTION 16
OTHER INFORMATION
Label Information
螖 WARNING
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 irritation to eyes, skin, nose,
throat and upper respiratory tract. Avoid irritation by reducing exposure to dust. Use in a well-ventilated area or provide
sufficient local ventilation. If dusty, wear a NIOSH/MSHA-approved dust respirator. Wear eye protection. If eye contact
occurs, flush thoroughly with water for 15 minutes. If irritation persists, call physician. Wash with soap and water after
use. Do not ingest. If ingested, call physician.
Product safety information: (800) 507-8899 or www.usg.com.
KEEP OUT OF REACH OF CHILDREN.
INFORMATION FOR HANDLING AND IDENTIFICATION OF CHEMICAL HAZARDS
MSDS # 53-100-112E
MATERIAL SAFETY DATA SHEET Page 8 of 8
USG Gypsum Plaster Retarder for Lime Based Products
0 = Minimal Hazard
HEALTH 0
*
0
NFPA Ratings: HMIS Ratings: 1 = Slight Hazard
FLAMMABILITY 0
0
0
Health: 0 Health: 0 2 = Moderate Hazard
PHYSICAL HAZARD 0
Fire: 0 Fire: 0 3 = Serious Hazard
E
PERSONAL PROTECTION
Reactivity: 0 Reactivity: 0 4 = Severe Hazard
*Respirable crystalline silica can cause lung disease and/or cancer. E 鈥? Safety glasses, gloves and dust respirator
Key/Legend
TLV Threshold Limit Value
PEL Permissible Exposure Limit
CAS Chemical Abstracts Service (Registry Number)
NIOSH National Institute for Occupational Safety and Health
MSHA Mine Safety and Health Administration
OSHA Occupational Health and Safety Administration
ACGIH American Conference of Governmental Industrial Hygienists
IARC International Agency for Research on Cancer
DOT United States Department of Transportation
EPA United States Environmental Protection Agency
NFPA National Fire Protection Association
HMIS Hazardous Materials Identification System
PPE Personal Protection Equipment
TSCA Toxic Substances Control Act
DSL Canadian Domestic Substances List
NDSL Canadian Non-Domestic Substances List
SARA Superfund Amendments and Reauthorization Act of 1986
CAA Clean Air Act
Emergency Planning & Community Right-to-know Act
EPCRA
RCRA Resource Conservation and Recovery Act
CERCLA Comprehensive Environmental Response, Compensation and Liability Act of 1980
UN/NA# United Nations/North America number
CFR Code of Federal Regulations
WHMIS Workplace Hazardous Material Information System
Prepared by:
Product Safety
USG Corporation
125 South Franklin St.
Chicago, Illinois 60606
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