SDS

11. Toxicological Information
Likely Route(s) of Exposure:
Ingestion:
Skin: Dust
Inhalation: Dust
Eye: Dust
Signs and Symptoms of Exposure: See section 4
Wood Dust - NTP: According to its Report on Carcinogens, Thirteenth Edition, NTP states, “Wood 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 nasal cavity has been
observed in many case reports, cohort studies, and case-control studies that specifically addressed
nasal cancer. Associations with cancer of the nasal cavities and paranasal 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. This classification is based primarily on increased risk in
the occurrence of adenocarcinomas of the nasal cavities and paranasal sinuses associated with
exposure to wood dust. The evaluation did not find sufficient evidence to associate cancers of the
oropharynx, hypopharynx, lung, lymphatic and hematopoietic systems, stomach, colon or rectum with
exposure to wood dust. There is inadequate evidence for the carcinogenicity of wood dust from
studies in experimental animals according to NTP.
Wood Dust: IARC – 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 to 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.
Carcinogenicity Listing(s):
NTP:
Wood dust, Known Human Carcinogen.
IARC Monographs:
Wood dust, Group 1 - Carcinogenic to Humans.
 OSHA Regulated:
Toxicity Data: No specific information available for product or material in purchased form. Individual
component information is listed below.
Components:
Wood dust (softwood or hardwood)
Dusts generated from sawing, sanding or machining the product may cause respiratory irritation, nasal
dryness and irritation, coughing and sinusitis. NTP and IARC (Group 1) classify wood dust as a
human carcinogen. See Section 2 above.
Target Organs: Eyes, skin, and respiratory system.
Note: Weyerhaeuser evaluated the studies referenced in the ACGIH
®
TLV
®
Documentation for Wood
Dust and others which included potential allergenic references for wood species which may cause
skin or respiratory sensitization. There are a limited number of studies of highly variable consistency
which reference sensitization from some species of wood. When the total weight of evidence is
considered this product is considered to be an eye, skin and repository irritant and not a respiratory or
skin sensitizer according to health hazard classification criteria.
12. Ecological Information
Ecotoxicity: NAV for finished product.
Biopersistance and Degradability: Wood in this product or byproduct would be expected to be
biodegradable.
Bioaccumulation: Not expected to bioaccumulate.
Soil Mobility: NAV
Other Adverse Effects: NAP
Weyerhaeuser SDS WC S335-12 (M)
Page 6 of 9 Rev. 09/11/2015