SDS

3. Composition/Information on Ingredients
Ingredients
CAS#
Wt %
Wood (wood dust, softwood or hardwood, logs,
wood chips)
None 84-89
Common names: Untreated lumber, untreated wood, sawdust, sander dust, raw logs, wood chips.
NOTE: Wood products such as logs, bark and wood dust may include additional material such as soil and rock
fragments which may contain particles of crystalline silica
.
4. First Aid Measures
Inhalation: Remove to fresh air if respiratory symptoms are experienced. Seek medical help if persistent
irritation, severe coughing, breathing difficulty or other serious symptoms occur.
Eye Contact: Treat dust in eye as a foreign object. Flush with water to remove dust particles. Remove
contact lenses if present and easy to do so. Avoid touching or rubbing eyes to avoid further irritation
or injury. Seek medical help if irritation persists.
Skin Contact: Wood dust can elicit contact dermatitis. Seek medical help if rash, irritation or dermatitis
persists.
Skin Absorption: Not known to be absorbed through the skin.
Ingestion: Not applicable under normal use.
Symptoms or Effects:
Acute Symptoms/Effects – Wood dust may cause mechanical irritation of the respiratory system. Wood
dust can cause physical obstructions in the nasal passages, resulting in dryness of nose, dry cough,
and sneezing. Wood dust may cause mechanical irritation of the eyes.
Delayed Symptoms/Effects – Unique delayed effects are not anticipated after exposure. See Section 11
for additional information on chronic effects.
5. Fire-fighting Measures
Extinguishing Media and Restrictions: Water, carbon dioxide and sand.
Specific Hazards, Anticipated Combustion Products: Natural decomposition of organic materials
such as wood may produce toxic gases and an oxygen deficient atmosphere in enclosed or poorly
ventilated areas. Thermal decomposition (i.e. smoldering, burning) products include carbon
monoxide, carbon dioxide, aliphatic aldehydes, terpenes, and polycyclic aromatic hydrocarbons.
Autoignition Temperature: Variable [typically 400°-500°F (204°-260°C)]
Special Firefighting Equipment/Procedures: No special equipment anticipated. Beware of potential
combustible dust explosion hazard.
Unusual Fire and Explosion Hazards: Depending on moisture content and more importantly, particle
diameter and airborne concentration, wood dust may explode in the presence of an ignition source.
Wood dust may similarly deflagrate (combustion without detonation like an explosion) if ignited in an
open or loosely contained area. 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. Reference NFPA Standards 654 and 664 and
the NFPA Fire Protection Handbook for guidance. Ventilation systems should be kept clean and
precautions should be taken to prevent sparks or other ignition sources.
6. Accidental Release Measures
Steps to be taken in case Material Is Released or Spilled: Sweep or vacuum up for recovery and
disposal. Avoid creating dusty conditions whenever feasible. Maintain good housekeeping to avoid
accumulation of wood dust on exposed surfaces. Use approved filtering facepiece respirator (“dust
mask”) or higher levels of respiratory protection as indicated and goggles where ventilation is not
possible and exposure limits may be exceeded or for additional worker comfort.
Weyerhaeuser SDS WC S335-12 (M)
Page 3 of 9 Rev. 09/11/2015