Material Safety Data Sheet
Mycostat 鈥? P Treated Wood
Weyerhaeuser Company Emergency Phone: (253) 924-5000
PO Box 9777 Additional Information: (253) 924-3865
Federal Way, WA 98063-9777 CHEMTREC: (800) 424-9300
http://www.weyerhaeuser.com/environment/msds/default.asp Revised Date: January 10, 2006
1. Product Identification
Product Manufacturing Location(s)
Mycostat 鈥? P鈩? Treated Wood USA: Aberdeen, WA; Cottage Grove OR; Longview
WA; Bauman, OR and Dallas, OR.
Synonyms: Anti-stain treated wood.
2. Hazardous Ingredients/Identity Information
Name CAS# Percent Agency Exposure Limits Comments
PEL-TWA 15 mg/m3
Wood None >99 OSHA Total dust
PEL-TWA 5 mg/m3
OSHA Respirable dust fraction
TLV-TWA 0.5 mg/m3
ACGIH Inhalable, Western red
cedar
TLV-TWA 1 mg/m3
ACGIH Inhalable, All other species
1
PEL-TWA 5 mg/m3 Softwood or hardwood
Recommended
total dust
1
PEL-STEL 10 mg/m3 Softwood or hardwood
Recommended
total dust
1
PEL-TWA 2.5 mg/m3 Western red cedar total
Recommended
dust
Mycostat 鈥揚 0.1-0.2 OSHA None None
Contains: ACGIH None None
Propiconazole 60207-90-1 0.00088 OSHA None None
ACGIH None None
Tertiary Amine Proprietary < 0.1 OSHA None None
ACGIH None None
1
Weyerhaeuser recommended exposure limits based on 1989 OSHA PELs. In 1992, the U.S. Court of Appeals for the Eleventh Circuit
Court overturned OSHA鈥檚 1989 Air Contaminants Rule, which included specific PELs for wood dust established by OSHA at that time.
Wood dust is now officially regulated as an organic dust in a category known as 鈥淧articulates Not Otherwise Regulated鈥? (PNOR), or
Nuisance Dust. However, a number of states have incorporated the OSHA PELs from the 1989 standard in their state plans.
Additionally, OSHA has announced that it may cite companies under the OSH Act general duty clause under appropriate circumstances
for noncompliance with the 1989 PELs.
3. Hazard Identification
Appearance and Odor: Color and odor depend on the wood species and time since wood was treated.
The product may have a faint wood odor having a color inherent to the species of wood that was treated.
Weyerhaeuser MSDS WC 291-04
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3. Hazard Identification (cont鈥檇.)
Primary Health Hazards: The primary health hazard posed by this product is thought to be due to inhaling
wood dust.
Primary Route(s) of Exposure:
Ingestion:
鈱? Skin: Dust
鈱? Inhalation: Dust
鈱? Eye: Dust
Medical Conditions Generally Aggravated by Exposure: Wood dust may aggravate pre-existing
respiratory conditions or allergies.
Chronic Health Hazards: Wood dust, depending on the species, may cause allergic contact dermatitis and
respiratory sensitization with prolonged, repetitive contact or exposure to elevated dust levels.
Prolonged exposure to wood dust has been reported by some observers to be associated with nasal
cancer.
Carcinogenicity Listing:
NTP: Not listed
鈱? IARC Monographs: Wood dust, Group 1
OSHA Regulated: Not listed
IARC 鈥? Group 1: Carcinogenic to Humans; sufficient evidence of carcinogenicity. This classification is
primarily based on studies showing an association between occupational exposure to wood dust and
adenocarcinoma of the nasal cavities and paranasal sinuses. IARC did not find sufficient evidence of an
association between occupational exposure to wood dust and cancers of the oropharynx, hypopharynx,
lung, lymphatic and hematopoietic systems, stomach, colon or rectum.
4. Emergency and First-Aid Procedures
Ingestion: Not applicable under normal use.
Eye Contact: Wood dust may cause irritation. Treat dust in eye as foreign object. Flush with water to
remove dust particles. Avoid touching or rubbing eyes after direct contact with product as this may
cause a burning sensation. Seek medical help if irritation persists.
Skin Contact: Wood dust of certain species can elicit allergic contact dermatitis in sensitized individuals, as
well as mechanical irritation resulting in erythema and hives. At the very low application rate to the
surface of the the wood, Mycostat 鈥? P will not irritate the skin. Seek medical help if rash, irritation or
dermatitis persists.
Skin Absorption: Not known to occur under normal use.
Inhalation: Dust may cause irritation and unpleasant obstruction in the nasal passages, resulting in dryness
of nose, dry cough, sneezing, and headaches. Remove to fresh air. Seek medical help if persistent
irritation, severe coughing or breathing difficulty occurs.
Note to Physician: None
5. Fire and Explosion Data
Flash Point (Method Used): NAP
See below under 鈥淯nusual Fire UFL = NAP
Flammable Limits: LFL =
and Explosion Hazards鈥?
Extinguishing Media: Water, carbon dioxide, sand
Autoignition Temperature: Variable [typically 400掳-500掳 F (204掳-260掳C)]
Special Firefighting Procedures: Use water to wet down wood dust to reduce the likelihood of ignition or
dispersion of dust into the air. Remove burned, charred or wet dust to open, secure area after fire is
extinguished.
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5. Fire and Explosion Data (cont鈥檇.)
Unusual Fire and Explosion Hazards: Depending on moisture content and more importantly, particle
diameter, wood dust may explode in the presence of an ignition source. An airborne concentration of 40
grams (40,000 mg) of dust per cubic meter of air is often used as the LEL for wood dusts.
NFPA Rating (Scale 0-4): Health = Fire = Reactivity =
6. Accidental Release Measures
Steps to be Taken In Case Material Is Released or Spilled: Not applicable for product in purchased form.
Wood dust may be vacuumed or shoveled for recovery or disposal. Avoid dusty conditions and provide
good ventilation. Use NIOSH-approved dust respirator and goggles where ventilation is not possible and
allowable exposure limits may be exceeded.
7. Handling and Storage
Precautions to be Taken In Handling and Storage: Avoid repeated or prolonged breathing of wood dust.
Avoid eye contact and repeated or prolonged contact with skin. Keep in cool, dry place away from open
flame.
8. Exposure Control Measures, Personal Protection
Personal Protective Equipment:
RESPIRATORY PROTECTION 鈥? A NIOSH-approved dust respirator is recommended when allowable
exposure limits may be exceeded.
EYE PROTECTION 鈥? Not applicable for product in purchased form. Goggles or safety glasses are
recommended when machining this product and in areas with high dust levels.
PROTECTIVE GLOVES 鈥? Leather gloves are recommended to minimize potential mechanical irritation from
handling product.
OTHER PROTECTIVE CLOTHING OR EQUIPMENT 鈥? Outer garments may be desirable in extremely dusty
areas. If dust accumulates on clothes, launder before reuse. Wash work clothes separately from other
household clothing.
WORK/HYGIENE PRACTICES 鈥? Follow good hygienic and housekeeping practices. Clean up areas where
wood dust settles to avoid excessive accumulation of this combustible material. Minimize blowdown or
other practices that generate high airborne-dust concentrations.
Ventilation:
LOCAL EXHAUST 鈥? Provide local exhaust as needed so that exposure limits are met.
MECHANICAL (GENERAL) 鈥? Provide general ventilation in processing and storage areas so that exposure
limits are met.
SPECIAL 鈥? Self-contained breathing apparatus (SCBA) recommended when fighting fire.
OTHER 鈥? None
9. Physical/Chemical Properties
Physical Description: Color and odor depend on the wood species and time since wood was treated. The
product may have a faint wood odor having a color inherent to the species of wood that was treated.
NAP
Boiling Point (@ 760 mm Hg):
Evaporation Rate (Butyl Acetate = 1): NAP
NAP
Freezing Point:
NAP
Melting Point:
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9. Physical/Chemical Properties (cont鈥檇.)
NAP
Molecular Formula:
NAP
Molecular Weight:
NAP
Oil-water Distribution Coefficient:
NAV
Odor Threshold:
NAP
pH:
Insoluble
Solubility in Water (% by weight):
Variable; depends on wood species and moisture
Specific Gravity (H2O = 1):
NAP
Vapor Density (air = 1; 1 atm):
NAP
Vapor Pressure (mm Hg):
NAP
Viscosity:
% Volatile by Volume [@ 70oF (21oC)]: NAP
10. Stability and Reactivity
鈱? Stable
Stability: Unstable
Conditions to Avoid: Avoid open flame. Product may ignite at temperatures in excess of 400掳F (204掳C).
Incompatibility (Materials to Avoid): Avoid contact with oxidizing agents and drying oils.
Hazardous Decomposition or By-Products: Thermal decomposition products include carbon monoxide,
carbon dioxide, aliphatic aldehydes, rosin acids, terpenes, polycyclic aromatic hydrocarbons, hydrogen
cyanide and oxides of nitrogen.
鈱? Will not occur
Hazardous Polymerization: May occur
Sensitivity to Mechanical Impact: NAP
Sensitivity to Static Discharge: NAP
11. Toxicological Information
Toxicity Data: No information available for product in purchased form. Individual component information is
listed below if available.
Components:
Wood dust (softwood or hardwood): OSHA Hazard Rating = 3.3; moderately toxic with probable oral lethal
dose to humans being 0.5-5 g/kg (about 1 pound for a 70 kg or 150 pound person).
Source: OSHA Regulated Hazardous Substances, Government Institutes, Inc., February 1990.
Mycostat 鈥揚: LD50 (rats, oral) = >2000mg/kg Moderately toxic. LD50 (rats, dermal) = >2000mg/kg
Moderately toxic. LC50 (rats, inhalation) = >0.62 but < 2.0mg/l highly toxic. Mycostat 鈥揚 data is based
on internal studies performed by Diacon, the manufacturer of Mycostat-P.
Target Organs: NAP
12. Ecological Information
Environmental Fate: No information available for product in purchased form. Individual component
information is listed below if available. Mycostat-P: LC50 (rainbow trout) = 1.1 ppm
Environmental Toxicity: No information available for product in purchased form.
13. Disposal Considerations
Waste Disposal Method: Follow applicable federal, state, and local regulations for disposal of a waste
material. It is the user鈥檚 responsibility to determine at the time of disposal whether your product meets
RCRA criteria for hazardous waste.
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14. Transport Information
Mode: (Air, Land, water) Not regulated as a hazardous material by the U.S. Department of Transportation.
Not listed as a hazardous material in Canadian Transportation of Dangerous Goods (TDG) regulations.
Not listed as a Hazardous material for IATA, and IMDG.
NAP
Proper Shipping Name:
NAP
Hazard Class:
NAP
UN/NA ID Number:
NAP
Hazard Zone:
NAP
Packing Group:
15. Regulatory Information
TSCA: All ingredients are on the TSCA inventory.
CERCLA:
DSL: Wood dust is not required to be listed under the Canadian Domestic Substance List.
OSHA:
STATE RIGHT-TO-KNOW: This product is known to contain any substances subject to the disclosure
requirements of:
California Prop 65 鈥? none
New Jersey 鈥? none
Pennsylvania 鈥? When cut or otherwise machined, the product may emit wood dust, a listed substance in
Pennsylvania.
SARA 313 Information: To the best of our knowledge, this product contains no chemical subject to SARA
Title III Section 313 supplier notification requirements.
SARA 311/312 Hazard Category: This product has been reviewed according to the EPA 鈥淗azard
Categories鈥? promulgated under SARA Title III Sections 311 and 312 and is considered, under applicable
definitions, to meet the following categories:
An immediate (acute) health hazard Yes
A delayed (chronic) health hazard Yes
A fire hazard No
A reactivity hazard No
A sudden release hazard No
FDA:
WHMIS Classification:
16. Additional Information
Date Prepared: 12/1/96
Date Revised: 01/10/2006
Prepared By: Weyerhaeuser Company, Corporate Environment, Health & Safety
Weyerhaeuser MSDS available on: http://www.weyerhaeuser.com/environment/msds/default.asp
User鈥檚 Responsibility: The information contained in this Material Safety Data Sheet is based on the
experience of occupational health and safety professionals and comes from sources believed to be
accurate or otherwise technically correct. It is the user鈥檚 responsibility to determine if this information is
suitable for their applications and to follow safety precautions as may be necessary. The user has the
responsibility to make sure that this sheet is the most up-to-date issue.
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16. Additional Information (cont鈥檇.)
Definition of Common Terms:
ACGIH = American Conference of Governmental Industrial Hygienists
C = Ceiling Limit
CAS# = Chemical Abstracts System Number
DOT = U. S. Department of Transportation
DSL = Domestic Substance List
EC50 = Effective concentration that inhibits the endpoint to 50% of control population
EPA = U.S. Environmental Protection Agency
IARC = International Agency for Research on Cancer
IATA = International Air Transport Association
IMDG = International Maritime Dangerous Goods
LC50 = Concentration in air resulting in death to 50% of experimental animals
LCLo = Lowest concentration in air resulting in death
LD50 = Administered dose resulting in death to 50% of experimental animals
LDLo = Lowest dose resulting in death
LEL = Lower Explosive Limit
LFL = Lower Flammable Limit
MSHA = Mine Safety and Health Administration
NAP = Not Applicable
NAV = Not Available
NIOSH = National Institute for Occupational Safety and Health
NPRI = Canadian National Pollution Release Inventory
NTP = National Toxicology Program
OSHA = Occupational Safety and Health Administration
PEL = Permissible Exposure Limit
RCRA = Resource Conservation and Recovery Act
STEL = Short-Term Exposure Limit (15 minutes)
STP = Standard Temperature and Pressure
TCLo = Lowest concentration in air resulting in a toxic effect
TDG = Canadian Transportation of Dangerous Goods
TDLo = Lowest dose resulting in a toxic effect
TLV = Threshold Limit Value
TSCA = Toxic Substance Control Act
TWA = Time-Weighted Average (8 hours)
UFL = Upper Flammable Limit
WHMIS = Workplace Hazardous Materials Information System
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