Material Safety Data Sheet (MSDS)1 鈥? Oriented Strand Board (OSB)
Product Identification
Product: Generic OSB
Hazardous Ingredients
Ingredient CAS# Percent Agency Exposure Limits Comments
Wood None 95-99 OSHA PEL-TWA 15mg/m3 Total dust
OSHA PEL-TWA 5mg/m3 Respirable dust fraction
ACGIH TLV-TWA .5mg/m3 Inhalable western red cedar
ACGIH TLV-TWA 1mg/m3 Inhalable, All other species
2
OSHA PEL-TWA 5mg/m3 Softwood or hardwood total dust
2
OSHA PEL-STEL 10mg/m3 Softwood or hardwood total dust
2
OSHA PEL-TWA 2.5mg/m3 Western red cedar total dust
3
Phenol None 1-15 OSHA PEL-TWA 0.75 ppm Free gaseous formaldehyde
formaldehyde OSHA PEL-STEL 2 ppm Free gaseous formaldehyde
resin solids ACGIH TLV-Ceiling 0.3 ppm Free gaseous formaldehyde
3
Polymeric 9016-87-9 1-15 OSHA None None
Diphenylmethane ACGIH None
Diisocyanate ACGIH TLV-Ceiling 0.3 ppm
Free None 0.01 OSHA PEL-TWA 0.3 ppm Free gaseous formaldehyde
Formaldehyde PEL-STEL 2.0 ppm
Paraffin Wax N/A 0-2 OSHA PEL-TWA 2mg/m3 Paraffin wax fume
ACGIH TLV-TWA 2mg/m3 Paraffin wax fume
Hazard Identification
Appearance and Odor: OSB is produced with interlocking wood fibers having a slightly aromatic
resinous odor and natural wood color. The wood component of these products may consist of alder,
aspen, beech, birch, hickory, maple, oak, pecan, pine, poplar, Western red cedar and/or other mixed
hardwood species.
1
This MSDS is intended to be used solely for safety education and not for use as specification or warranties. The information in this MSDS comes from
sources4 believed to be accurate or otherwise technically correct but is provided without any representations or warranties regarding the accuracy or
correctness. It is the user鈥檚 responsibility to determine if this information is suitable for their applications and to follow safety precautions as deemed
necessary.
2
Exposure Limits based on 1989 OSHA PELs. A number of states have incorporated the OSHA PELs from the 1989 standard. Accordingly, OSHA has
announced that it may cite companies under the OSH Act general duty clause under appropriate circumstances for non-compliance with the 1989 PELs.
3
These products contain less than 0.05 ppm free formaldehyde.
4
Weyerhaeuser MSDS WC 301-06; LP data sheet-021; and SBA TB-115
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Primary Health Hazards: The primary health hazard posed by this product is thought to be due to
exposure to wood dust.
Primary Route(s) of Exposure:
( ) Ingestion:
(X) Skin: Dust
(X) Inhalation: Dust
(X) Eyes: Dust
Medical Conditions Generally Aggravated by Exposure: Wood dust may irritate eyes and
aggravate preexisting respiratory conditions or allergies.
Chronic Health Hazards: Dust of some 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 to be associated with nasal cancer.
Carcinogenicity Listing:
(X) NTP: Known Human Carcinogen
(X) IARC Monographs: Wood dust, Group 1
( ) OSHA Regulated: Not listed
NTP: According to its Tenth Report on Carcinogens, NTP states, 鈥淲ood dust is known to be a human
carcinogen based on sufficient evidence of carcinogenicity from studies in humans. An association
between wood dust exposure and cancer of the nose has been observed in many case reports,
cohort studies, and case-control studies that specifically addressed nasal cancer. Strong and
consistent associations with cancer of the nasal cavities and Para nasal sinuses were observed both
in studies of people whose occupations are associated with wood dust exposure and in studies that
directly estimated wood dust exposure.鈥?
IARC 鈥? Group 1: Carcinogenic to humans; sufficient evidence of carcinogenicity. Classification is
based on studies showing an association between occupational exposure to wood dust and
adenocarcinoma of the nasal cavities and paranasal sinuses. There is insufficient evidence of an
association between occupational exposure to wood dust and cancers of the oropharynx,
hypopharynx, lung, lymphatic and hematopoetic systems, stomach, colon or rectum.
Emergency and First-Aid Procedures
Ingestion: N/A under normal use.
Eye Contact: Wood dust may cause mechanical irritation. Flush with water for at least 15 minutes
to remove dust particles. Seek medical help if irritation persists.
Skin Contact: Dust of certain species can elicit allergic contact dermatitis in sensitized individuals,
as well as mechanical irritation resulting in erythema and hives. Wash with soap and water. Seek
medical attention if sighs of rash, irritation or dermatitis persists.
Skin Absorption: Not known to occur under normal use.
Inhalation: Dust may cause obstruction in the nasal passages, resulting in dryness of nose, dry
cough, sneezing and headaches. Clear passages and remove to fresh air. Seek medical help if
persistent irritation, severe coughing or breathing difficulty occurs.
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Fire and Explosion Data
Flash Point: N/A
Flammable Limits:
LEL: See (1) below
UEL: N/A
Extinguishing Media: Water, carbon dioxide, sand.
Autoignition Temperature: Variable [typically 400-500掳F (204-260掳C)]
Special Firefighting Procedures: None
(1) Unusual Fire and Explosion Hazards: Depending on moisture content and 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.
Accidental Release Measures
Steps to be Taken in Case of Release or Spills: N/A for product in purchased form. Wood dust
generated from machining of this product may be vacuumed or shoveled for recovery or disposal.
Avoid dusty conditions and provide good ventilation. Use NIOSH/MSHA-approved dust respirator
and goggles where ventilation is not possible and the allowable exposure limits may be exceeded.
Handling and Storage
Precautions:
(1) No special handling precautions required for product in purchase form.
(2) Provide ventilation or other measures so that wood dust levels are below the exposure limits.
(3)These products may release very small quantities of formaldehyde in gaseous form. Under
foreseeable conditions of use, these products release less than 0.050 ppm in standard large chamber
test conditions.
(4) Store in well-ventilated, cool, dry place away from open flame.
Note: Products with 100% polymeric (MDI) adhesives have no formaldehyde emissions.
Exposure Control Measures
Personal Protective Equipment:
RESPIRATORY PROTECTION - N/A for product in purchase form. A NIOSH/MSHA-approved dust
respirator is recommended when allowable exposure limits may be exceeded.
PROTECTIVE GLOVES 鈥? Not required. Cloth, canvas, or leather gloves are recommended to
minimize potential mechanical irritation and or slivers from handling product.
EYE PROTECTION 鈥? N/A for product in purchased form. Goggles or safety glasses are
recommended when machining this product do to wood dust.
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OTHER PROTECTIVE CLOTHING OR EQUIPMENT 鈥? N/A for product in purchased form.
WORK/HYGIENE PRACTICES 鈥? Clean up areas where wood dust settles to avoid excessive
accumulation. Minimize 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? N/A
Physical/Chemical Properties
Boiling Point (@ 760 mm Hg): N/A
Vapor Pressure (mm Hg): N/A
Vapor Density (air = 1; 1 atm): N/A
Specific Gravity (H2O) = 1): Variable; depends on wood species and moisture
Melting Point: N/A
Evaporation Rate (Butyl acetate = 1): N/A
Solubility in Water (% by weight): N/A to 0.2%
% Volatile by Volume [@ 70掳F (21掳C): 0
pH: N/A
Oil-water distribution coefficient: N/A
Odor threshold: Slight to None
Stability and Reactivity
Stability: ( ) Unstable (X) Stable
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 oxidizers such as concentrated nitric acid,
oxygen, hydrogen, peroxide, and chlorine.
Hazardous Decomposition or By-Products: By-products of thermal decomposition include carbon
monoxide, carbon dioxide, aliphatic aldehydes, rosin acids, terpenes and polycyclic aromatic
hydrocarbons.
Hazardous Polymerization: ( ) May occur (X) Will not occur
Sensitivity to Mechanical Impact: N/A
Sensitivity to Static Discharge: N/A
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Toxicological Information
None available for product in purchased form.
Wood Dust: Wood dust is known to be a human carcinogen. An increased incidence of
adenocarcinoma of the nasal cavities and Para nasal sinuses was observed in studies of people
whose occupations are associated with wood dust exposure. (10th Edition of the National Toxicology
Program鈥檚 Report on Carcinogens) Wood dust from some tree species may induce sensitization.
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).
MDI Resins and Formaldehyde: N/A
Chronic (Cancer) Information: For typical products tested, MDI off gassing is below the detection
limit of 20ppt. See section Hazardous Ingredients.
Birth defect information: N/A
Reproduction Information: Reproductive effects in animals have been reported in RTECS for
formaldehyde.
Sensitizer: Exposure to low doses of formaldehyde may cause sensitization.
Ecological Information
OSB products are not expected to pass any ecological hazard as a result of intended uses.
Disposal Considerations
Waste Disposal Method: Incinerator is preferred if disposed or discarded in its purchased form. Dry
land disposal is acceptable in most states. Follow applicable federal, state, and local regulations.
Transport Information
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) regulation.
Regulatory Information
OSHA Hazard Communication CFR 1910.1200 (b)(6)(iv)
EPCRA (Emergency Planning and Community Right-to-Know act) EHS RQ section 302 N/A
EPCRA Section 313 N/A
Comprehensive Environmental Response Compensation and Liability Act N/A
Environmental Protection Agency & Clean Air Act section 112(r) N/A
Uniform Fire Code N/A
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Additional Information
Definition of Terms:
ACGIH American Conference of Governmental Industrial Hygienists
CAS# Chemical Abstracts System Number
CFR Code of Federal Regulations
IARC International Agency for Research on Cancer
LEL Lower Explosive Limits
MSHA Mining Safety and Health Administration
N/A Not Applicable
NIOSH National Institute for Occupational Safety and Health
NTP National Toxicology Program
OSHA Occupational Safety and Health Administration
PEL Permissible Exposure Limit
PPM Parts per Million
STEL Short-Term Exposure Limit (15 minutes)
TLV Threshold Limit Value
TWA Time-Weighted Average (8 hours)
UEL Upper Explosive Limits
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