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Black walnut wood saw dust is considered to be a highly toxic
substance. I don't know about walnut shell dust but I would prefer to
_good_ dust removal system when using walnut shells, _and_ working
walnut. Black walnut is the more desirable cabinet wood.
Newton
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cat woodrisk
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From: rwex@clark.net (Richard L. Wexelblat)
Newsgroups: rec.woodworking
Subject: Toxic woods
Date: 24 Feb 1995 00:54:43 GMT
Organization: Wood Lily Turned Wood Products
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I'll be darned. I kept this list from the last time it was posted:
Newsgroups: rec.woodworking
Date: 4 Nov 1994 20:37:04 GMT
Reply-To: Bruce Taylor
I found the following chart in _American Woodturner_ June 1990, reprinted from
_Art Hazards News_ Vol. 13 No.5, compiled by Robert Woodcock, RN,BSN,CEN.
------------------------------------------------------------------------
Wood Reaction Site Potency Source Incidence
---- -------- ---- ------- ------ ---------
Bald Cypress S R +- D R
Balsam Fir S E,S +- LB C
Beech S,C E,S,R +-+- LB,D C
Birch S R +-+- W,D C
Black Locust I,N E,S +-+-+- LB C
Blackwood S E,S +-+- W,D C
Boxwood S E,S +-+- W,D C
Cashew S E,S +- W,D R
Cocobolo I,S E,S,R +-+-+- W,D C
Dahoma I E,S +-+- W,D C
Ebony I,S E,S +-+- W,D C
Elm I E,S +- D R
Goncalo Alves S E,S +-+- W,D R
Greenheart S E,S +-+-+- W,D C
Hemlock C R ? D U
Iroko I,S,P E,S,R +-+-+- W,D C
Mahogany S,P S,R +- D U
Mansonia I,S E,S +-+-+- W,D C
N +- D
Maple (Spalted) S,P R +-+-+- D C
Mimosa N ? LB U
Myrtle S R +-+- LB,D C
Oak S E,S +-+- LB,D R
C ? D U
Obeche I,S E,S,R +-+-+- W,D C
Oleander DT N,C +-+-+-+- D,W,LB C
Olivewood I,S E,S,R +-+-+- W,D C
Opepe S R +- D R
Padauk S E,S,R +- W,D R
Pau Ferro S E,S +- W,D R
Peroba Rosa I R,N +-+- W,D U
Purpleheart N +-+- W,D C
Quebracho I R,N +-+- LB,D C
C ? D U
Redwood S,P E,S,R +-+- D R
C ? D U
Rosewoods I,S E,S,R +-+-+-+- W,D U
Satinwood I E,S,R +-+-+- W,D C
Sassafras S R +- D C
DT N +- D,W,LB R
C ? D U
Sequoia I R +- D R
Snakewood I R +-+- W,D R
Spruce S R +- W,D R
Walnut, Black S E,S +-+- W,D C
Wenge S E,S,R +- W,D C
Willow S R,N +- D,W,LB U
West. Red Cedar S R +-+-+- D,LB C
Teak S,P E,S,R +-+- D C
Yew I E,S +-+- D C
DT N,C +-+-+-+- W,D C
Zebrawood S E,S +-+- W,D
------------------------------------------------------------------------
REACTION: SITE: SOURCE: INCIDENCE:
I - irritant S - skin D - dust R - rare
S - sensitizer E - eyes LB - leaves,bark C - common
C - nasopharyngeal R - respiratory W - wood U - uncommon
cancer
P - pheumonitis, C - cardiac
alveolitis
(hypersensitivity
pneumonia)
DT - direct toxin
N - nausea, malaise
------------------------------------------------------------------------
Reference:
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
In addition to the above, remember to take appropriate precautions when
working with spalted wood.
The question about toxicity in wood happens often enough that maybe this
ought to be added to the FAQlist
--
Dick Wexelblat
rwexelblat@acm.org
202 927 2864
202 927 0231 (Fax)
gandalf%
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