Merlex Stucco
MATERIAL SAFETY DATA SHEET
1. PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: Interior Pronto Patch
MANUFACTURER: Merlex Stucco, Inc.
ADDRESS: 2911 Orange-Olive Rd.
Orange, CA 92665
Phone: 1-714-637-1700 Fax: 1-714-637-4865
Website: www.merlex.com
MSDS Date of Preparation: 11/22/04
2. COMPOSITION/INFORMATION ON INGREDIENTS
Component CAS No. Conc in %
Plaster of Paris (Calcium Sulfate Hemihydrate) 26499-65-0 40-70
Calcium Hydroxide 1305-62-0 10-20
Magnesium Hydroxide 1309-42-8 10-20
Perlite 93763-70-3 1-5
Crystalline silica, quartz 14808-60-7 <1
(See Section 8 for Exposure Limits)
3. HAZARDS IDENTIFICATION
Fine, white to gray colored powdered solid with no odor.
EMERGENCY OVERVIEW
Warning! May cause severe eye irritation and injury. May cause skin irritation or burns. Inhalation of dust may
cause irritation of the nose, throat and respiratory tract. When mixed with water, this material hardens and
becomes very hot 鈥? sometimes quickly. This can cause thermal burns to exposed skin. Prolonged inhalation of
respirable crystalline silica (quartz) may cause a disabling, progressive lung disease, silicosis, and lung cancer.
See Section 11 for detailed information
4. FIRST AID MEASURES
Ingestion: Wash mouth with water. Do not induce vomiting. Seek immediate medical attention.
Skin Contact: Remove contaminated clothing and wash immediately with plenty of soap and water. Get medical
attention if irritation or other symptoms develop. Launder contaminated clothing before reuse.
Eye Contact: Rinse immediately with plenty of water for 15 minutes, while lifting the eyelids. Get immediate
medical attention.
Inhalation: Remove affected person from source of exposure. If symptoms of exposure persist, get medical
attention.
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5. FIRE FIGHTING MEASURES
Flash Point: Not applicable
Autoignition Temperature: Not applicable
Flammable Limits In Air (% BY VOL.) Not applicable
Basic Firefighting Procedures: This product is not combustible. Use any extinguishing media that is
appropriate for the surrounding fire. Firefighters should always wear positive pressure self-contained breathing
apparatus and protective clothing when fighting fires involving chemicals.
Unusual Fire And Explosion Hazards: None.
Hazardous Decomposition Products: Thermal decomposition may generate oxides of calcium and sulfur.
6. ACCIDENTAL RELEASE MEASURES
Spill:. Wear appropriate protective clothing to avoid eye and skin contact including impervious gloves, safety
goggles and respirator if needed. Carefully collect dry material. Avoid creating airborne dust. Scrape up wet
product. Place into an appropriate container for re-use or disposal. Allow wet material to dry before disposal.
Report spills and releases as required to appropriate authorities.
7. HANDLING AND STORAGE
Handling: Do not breathe dust. Avoid contact with the eyes, skin and clothing. Wear appropriate protective
clothing and equipment handling this material. Wash thoroughly after handling. Immediately remove contaminated
clothing and launder before re-use. Do not eat, drink or smoke in the work area. Keep product dry until use.
Storage: Store in cool, dry area.
Empty Containers: Empty containers may contain product residue and may be hazardous. Follow all MSDS
precautions in handling empty containers.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION INFORMATION
Exposure Limits
Chemical Name Exposure Limits
10 mg/m3 ACGIH TLV-TWA (total dust)
Plaster of Paris (Calcium Sulfate
5mg/m3 OSHA PEL-TWA (respirable dust)
Hemihydrate)
15mg/m3 OSHA PEL-TWA (total dust)
5 mg/m3 ACGIH TLV-TWA (total dust)
Calcium Hydroxide
5mg/m3 OSHA PEL-TWA (respirable dust)
15mg/m3 OSHA PEL-TWA (total dust)
Magnesium Hydroxide None Established
0.05mg/m3 ACGIH TLV-TWA (respirable dust)
Crystalline silica, quartz
10 mg/m3 OSHA PEL-TWA (respirable dust)
%SiO2 + 2
10 mg/m3 ACGIH TLV-TWA (total dust)
Perlite
5mg/m3 OSHA PEL-TWA (respirable dust)
15mg/m3 OSHA PEL-TWA (total dust)
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Engineering Controls: Use with adequate general or local exhaust ventilation to maintain exposures as far as
possible below applicable occupational exposure limits.
Eye Protection: Safety glasses or goggles recommended.
Skin Protection: Avoid skin contact. Wear impervious gloves if needed to avoid contact.
Respiratory PROTECTION: If needed, a NIOSH approved respirator with dust cartridges (N95/P95 or N100/P100)
may be used. For higher exposures, a supplied air respirator may be required. Respirator selection and use
should be based on contaminant type, form and concentration. Follow OSHA 1910.134, ANSI Z88.2, CSA
Standard Z94.4-02 and good Industrial Hygiene practice.
9. PHYSICAL AND CHEMICAL PROPERTIES
Boiling Point: Not Applicable
Specific Gravity: Not Applicable
Melting Point: Not Determined
% Volatile: 0%
Vapor Pressure: Not Applicable
Evaporation Rate: Not Applicable
Vapor Density (Air = 1): Not Applicable
Solubility In Water: Insoluble
pH: Not Available
Appearance/Odor: Fine, white to gray colored powdered solid with no odor.
10. STABILITY AND REACTIVITY DATA
Stability: Stable under normal conditions of use and storage.
Incompatibility: Acids, ammonium salts and aluminum metal. Reacts with water producing heat.
Conditions To Avoid: Avoid contact with water and moisture until use.
Hazardous Decomposition Products: Thermal decomposition may generate oxides of calcium and sulfur.
11. TOXICOLOGICAL INFORMATION
PRODUCT HEALTH HAZARD INFORMATION
Skin: Contact with dry product may cause dryness of the skin. Contact with wet product or presence of product
on skin damp with sweat will cause irritation and possible serious burn. When mixed with water, this material
hardens and becomes very hot 鈥? sometimes quickly. This can cause thermal burns to exposed skin.
Eye: May cause severe irritation and possible serious eye injury. Dust may cause physical (mechanical) eye
injury.
Inhalation: May cause irritation of the nose, throat and upper respiratory tract.
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Ingestion: May cause irritation of the mouth and gastrointestinal tract. Plaster of paris will harden in the GI tract
and cause obstruction.
Chronic Heath Effects: Chronic overexposure to any respirable dust will cause adverse effects on the lung.
Chronic overexposure to respirable crystalline silica may cause a progressive, disabling lung disease, silicosis
which may be fatal. Symptoms include cough, shortness of breath, wheezing, non-specific chest illness and
reduced pulmonary function. This disease is exacerbated by smoking. The International Agency for Research on
Cancer (IARC) has determined that crystalline silica inhaled in the form of quartz from occupational sources is
carcinogenic to humans (Group 1). The National Toxicology Program classifies respirable crystalline silica as
known to be a human carcinogen.. The American Conference of Governmental Industrial Hygienists (ACGIH)
classifies crystalline silica, quartz, as a suspected human carcinogen (A2).
Acute Toxicity Values
Plaster of Paris: LD50 oral rat >5000 mg/kg.
12. ECOLOGICAL INFORMATION
The ecological effects of this product have not been determined.
13. DISPOSAL CONSIDERATIONS
Dispose in accordance with all local, state and federal regulations.
14. TRANSPORT INFORMATION
DOT Proper Shipping Name: Not Regulated
DOT Hazard Class: NA
UN Number: NA
DOT Labels Required: None
15. REGULATORY INFORMATION
SARA TITLE III INFORMATION:
Section 311/312 (40 CFR 370)Hazard Categories: Acute Health, Chronic Health
Section 313 (40 CFR 372): This product contains the following chemicals subject to SARA Title III Section 313
Reporting requirement: None
Section 302 (40 CFR 355): This product does not contain chemicals listed as extremely hazardous chemicals
under SUPERFUND Amendments and Reauthorization Act (SARA).
CERCLA 103 Reportable Quantity: None
EPA TSCA: All of the components of this product are listed on the EPA TSCA Inventory.
California Proposition 65: This product contains respirable crystalline silica, which is known to the State of
California to cause cancer.
16. OTHER INFORMATION
NFPA Hazard Rating: Health: 1 Fire: 0 Reactivity: 0
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HMIS Hazard Rating: Health: 2* Fire: 0 Reactivity: 0
REVISION DATE: 11/22/04
__________________________________________________________________________________
NOTICE: The information presented herein is based on data considered to be accurate as of the date of preparation of
this Material Safety Data Sheet. However, no warranty or representation, express or implied, is made as to the accuracy
or completeness of the foregoing data and safety information. It is the responsibility of the user to determine the
applicability of this information for his use.
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