Toxicity of Various Wood Species

This chart first appeared in the June 1990 issue of American Woodturner.
It has been posted on many websites and presented in many formats ...

Wood Species Reaction Areas Affected Potency
1=Low, 4=High
Assimilation
Source
Incidence
Bald Cypress Sensitizer Respiratory 1 Dust Rare
Balsam Fir Sensitizer Eyes, Skin 1 Leaves, Bark Common
Basswood Sensitizer Respiratory 1 Dust, Wood  
Beech Sensitizer, Cancer Respiratory, Skin, Eyes 2 Dust, Leaves, Bark Common
Birch Sensitizer Respiratory 2 Dust, Wood Common
Black Locust Irritant, Nausea, Malaise Eyes, Skin 3 Leaves, Bark Common
Blackwood Sensitizer Eyes, Skin 2 Dust, Wood Common
Boxwood Sensitizer Eyes, Skin 2 Dust, Wood Common
Cashew Sensitizer Eyes, Skin 1 Dust, Wood Rare
Cocobolo Irritant, Sensitizer, Eyes, Skin, Respiratory 3 Dust, Wood Common
Dahoma Irritant Eyes, Skin 2 Dust, Wood Common
Ebony Irritant, Sensitizer Eyes, Skin 2 Dust, Wood Common
Elm Irritant Eyes, Skin 1 Dust Rare
Goncalo Alves Sensitizer Eyes, Skin 2 Dust, Wood Rare
Greenheart Sensitizer Eyes, Skin 3 Dust, Wood Common
Hemlock Cancer Respiratory ? Dust Uncommon
Iroko Irritant, Sensitizer,
Hypersensitivity Pneumonia
Eyes, Skin, Respiratory 3 Dust, Wood Common
Jelutong Sensitizer Eyes, Skin, Respiratory 2 Dust, Wood Uncommon
Mahogany Sensitizer,
Hypersensitivity Pneumonia
Skin, Respiratory 1 Dust Common
Mansonia Irritant, Sensitizer, Nausea, Malaise Eyes, Skin 3 Dust, Wood Common
Maple (Spalted) Sensitizer,
Hypersensitivity Pneumonia
Respiratory 3 Dust Common
Mimosa Nausea, Malaise Internal ? Leaves, Bark Uncommon
Myrtle Sensitizer Respiratory 2 Dust, Leaves, Bark Common
Oak Sensitizer Eyes, Skin 2 Dust, Leaves, Bark Rare
Obeche Irritant, Sensitizer Eyes, Skin, Respiratory 3 Dust, Wood Common
Oleander Direct Toxin Cancer, Nausea, Malaise 4 Dust, Wood,
Leaves, Bark
Common
Olivewood Irritant, Sensitizer Eyes, Skin, Respiratory 3 Dust, Wood Common
Opepe Sensitizer Respiratory 1 Dust Rare
Padauk Sensitizer Eyes, Skin, Respiratory 1 Dust, Wood Rare
Pau Ferro Sensitizer Eyes, Skin 1 Dust, Wood Rare
Peroba Rosa Irritant Respiratory, Nausea, Malaise 2 Dust, Wood Uncommon
Purpleheart Irritant Nausea, Malaise 2 Dust, Wood Common
Quebracho Irritant Respiratory, Nausea, Malaise 2 Leaves, Bark,
Dust
Common
Redwood Sensitizer,
Hypersensitivity Pneumonia
Eyes, Skin, Respiratory 2 Dust Rare
Rosewoods Sensitizer, Irritant Eyes, Skin, Respiratory 4 Dust, Wood Uncommon
Satinwood Irritant Eyes, Skin, Respiratory 3 Dust, Wood Common
Sassafras Sensitizer Respiratory 1 Dust Common
Sequoia Irritant Respiratory 1 Dust Rare
Snakewood Irritant Respiratory 2 Dust, Wood Rare
Spruce Sensitizer Respiratory 1 Dust, Wood Rare
Tupelo Sensitizer Eyes, Respiratory 1 Dust  
Walnut, Black Sensitizer Eyes, Skin 2 Dust, Wood Common
Wenge Sensitizer Eyes, Skin, Respiratory 1 Dust, Wood Common
Willow Sensitizer Respiratory, Nausea, Malaise 1 Dust, Wood,
Leaves, Bark
Uncommon
Western Red Cedar Sensitizer Respiratory 3 Dust, Leaves, Bark Common
Teak Sensitizer,
Hypersensitivity Pneumonia
Eyes, Skin, Respiratory 2 Dust Common
Yew Irritant
Direct Toxin
Eyes, Skin
Cardiac
2
4
Dust
Dust, Wood
Common
Common
Zebrawood Sensitizer Eyes, Skin 2 Dust, Wood  
References:
1. Woods Toxic to Man, author unknown
2. Woods, B., Calnan, C.D., "Toxic Woods." Br. Journal of Dermatology 1976
3. ILO Encyclopedia of Occupational Health and Safety 1983
4. Lame, K., McAnn, M., AMA Handbook of Poisonous and Injurious Plants, AMA 1985
5. Poisondex, Micromedix Inc. 1990