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USG Imperial Basecoat Plaster-Old Product
Products in this Consumer Product Information Database (CPID) are classified based on their composition:
Substances: single chemicals
Preparations: products which contain chemicals that can be easily separated during normal use
Articles: products or product assemblies that do not contain chemicals that can be separated out from the product or assembly under normal or advertised use.
Classification: Preparation
Indicates country where product is sold.
Market: US/Canada
Imperial Basecoat Plaster is a high-strength, veneer plaster designed for two-coat applications over porous concrete block, or USG Plaster Bonder on the following surfaces: monolithic concrete; Fiberblock Abuse-Resistant Gypsum Fiber Panels; and Durock Cement Board.
Imperial Basecoat Plaster is recommended for interior wall and ceiling surfaces in all types of construction, particularly for hard-wear locations where durability and abrasion-resistance are required.
Purpose of product.
Usage: Plaster for walls and ceilingsStructure such as solid, liquid, aerosol etc.
Form: powderDate when validity of Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) was last verified.
Date verified: February 13, 2024550 West Adams Street
Chicago IL 60661
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Chemical Composition/Ingredients
The GHS is an acronym for The Globally Harmonized System of Classification and Labelling of Chemicals. The GHS is a system for standardizing and harmonizing the classification and labelling of chemicals. Chemicals are associated with codes that define their health, physical and environmental hazards.This universal hazard communication system was developed to ensure that employers, employees and consumers are provided with adequate, practical, reliable and comprehensible information on the hazards of chemicals, so that they can take effective preventive and protective measure for their own health and safety.
Advanced
The GHS classifications for chemicals associated with products in this database may be viewed by selecting the "Advanced" button on the Chemical Ingredients tables. Since this is a work in progress, GHS classifications may not be shown for all chemical ingredients.-
Primary Chemical Name is the standard name assigned to a chemical substance.
ChemicalChemical Abstracts Service Registry Number is a unique identifier for a chemical and its synonyms. CAS numbers identify the chemical, but not its concentration or specific mixture. CAS Registry Numbers are assigned by the Chemical Abstracts Service, a division of the American Chemical Society. For more information: www.cas.org
CAS No./ID
We have assigned "ID numbers" (with 6 leading zeros or nines, e.g., 000000-xx-x , 888888-xx-x) or 999999-xx-x) for blends and chemicals that do not have CAS numbers.Percent of chemical in preparation.
% Conc.Chemical of Concern (CoC)
Chemical of Concern(CoC)Calcium sulfate 007778-18-9 <10.0 No Quartz 014808-60-7 <25.0 Yes 
CoC List
Plaster of paris 026499-65-0 >65.0 No -
Health Effects Information
Ingredients and Health Effects Information are taken from the manufacturer's product label and/or the Material Safety Data Sheet (MSDS). Products are not tested and manufacturer's information presented here is not evaluated by DeLima Associates.
View Material Safety Data Sheet(MSDS) Date that Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) was issued by manufacturer of product.
MSDS DATE :January 01, 2011 Health Flammability Reactivity HMIS is the Hazardous Materials Identification System developed by the American Coatings Association and indicates the levels (“1” to “4”) of Health Hazard, Flammability Hazard and Physical Hazard associated with a specific product.
HMIS RATING1* 0 1 Measure of Alkalinity/Acidity of substance or preparation where a level of 7 is considered as neutral.
pH Levels7.0 -
Warnings
When mixed with water, this material hardens and becomes very hot 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 can cause irritation to eyes, skin and respiratory tract. Wear eye, skin and respiratory protection as necessary per working conditions. If eye contact occurs flush with water for 15 minutes. Do not ingest. If ingested, call physician. Dust can contain silica. Prolonged and repeated breathing of silica dust can cause lung damage and/or cancer. Product safety information: 800-507-8899 or usg. com. Customer Service: 800 USG-4-YOU (800 874-4968). KEEP OUT OF REACH OF CHILDREN.
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Acute health effects
From MSDS:
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. Respirable crystalline silica is classified as a carcinogen and long term breathing of respirable crystalline silica dust can cause silicosis and/or lung cancer. Take necessary measures to avoid exposure to respirable crystalline silica.
Potential Health Effects
Primary Routes of Entry: Inhalation, eyes and skin contact.
Inhalation: Exposure to dust generated during the handling or use of the product may cause temporary irritation to eyes, skin, nose, throat, 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. Labored breathing may occur after excessive inhalation. If respiratory symptoms persist, consult physician.
Eye contact: Dust can cause temporary mechanical irritation of eyes. If burning, redness, itching, pain or other symptoms persist or develop, consult physician.
Skin contact: None known.
Ingestion: None known.
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.
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Chronic health effects
From MSDS:
Due to the sand content of this product, exposures to respirable crystalline silica might be possible during the normal use of this product. Actual exposure levels must be determined by workplace hygiene testing. 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. -
Carcinogenicity
IARC - International Agency for Research on Cancer: 1- Carcinogenic to humans
NTP – National Toxicology Program (Health and Human Services Dept., Public Health Service, NIH/NIEHS): 1- Known to be carcinogen
ACGIH – American Conference of Governmental Industrial Hygienists: A2 – Suspected human carcinogen -
Handling information
Avoid dust contact with eyes and skin. Wear the appropriate eye and skin protection against dust. Minimize dust generation and accumulation. Avoid breathing dust. Wear the appropriate respiratory protection against dust in poorly ventilated areas and if TLV is exceeded. Use good safety and industrial hygiene practices.
Store in a cool, dry, ventilated area away from sources of heat, moisture and incompatibilities. As a dry powder, dew point conditions or other conditions causing presence of liquid will harden plaster of paris during storage.
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Disposal information
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. Trace amounts of residue can be flushed to a drain, using plenty of water.
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California Prop. 65 Warning
Contains chemicals known to the State of California to Cause Cancer.
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First Aid
Inhalation: Remove to fresh air. Leave the area of exposure and remain away until coughing and other symptoms subside. Other measures are usually not necessary, however if conditions warrant, contact physician.
Eye contact: In case of contact, do not rub or scratch your eyes. To prevent mechanical irritation, flush thoroughly with water for 15 minutes. If irritation persists, consult physician.
Skin contact: To prevent the drying effect of plaster of paris, wash with mild soap and water. A commercially available 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.
Ingestion: Plaster of paris hardens and, if ingested, may result in obstruction of the gut, especially the pyloric region. Drinking gelatin solutions or large volumes of water may delay setting.
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UN Global Harmonization Classification