All - I have no problem with Joe's data. but here is what the EU (at the recommendation of the Germans and Slovakians) is using. Read away - the good parts about males is toward the end. ECHA is the European Chemicals Agency.
http://echa.europa.eu/doc/consultations/svhc/svhc_axvrep_germany_cmr_boric_acid.pdf
-----Original Message-----
From: [log in to unmask]
To: [log in to unmask]
Sent: Tue, Mar 9, 2010 8:26 pm
Subject: Re: [LF] More importantly.... 8 new substances proposed for REACH control
Thanks Denny,
ound this which supports your comments but look at the levels required...
oxicologic studies on borax and boric acid
eferences and further reading may be available for this article. To view
eferences and further reading you must purchase this article.
Robert J. Weir, Jr.
azleton Laboratories, Inc., Falls Church, Virginia, 22046, USA
ussell S. Fisher Office of the Chief Medical Examiner of the State of
aryland, Baltimore, Maryland 21201, USA
eceived 22 July 1971.
vailable online 27 September 2004.
n Sprague-Dawley rats the acute po LD50 values for borax were 4.5 g/kg and
4.98 g/kg in males and females. respectively; boric acid, 3.45 g/kg in
ales and 4.08 g/kg in females. In Long-Evans male rats the LD50 values for
orax and boric acid were 6.08 g/kg and 3.16 g/kg, respectively. In 90 day
eeding studies, rats tolerated both borax and boric acid at 525 ppm boron
quivalent. Dogs displayed no adverse effect at 175 ppm of borax (as boron
quivalent) and 525 ppm of boric acid (as boron equivalent). In rats, high
oron levels at 1750 and 5250 ppm of both compounds caused growth
uppression, decreased food utilization efficiency, degeneration of gonads and
kin
esquamation on the paws and tails. At the 1750 ppm level, both boron
ompounds produced testicular atrophy in all male dogs. Two year dietary
eeding
tudies indicated that both borax and boric acid could be tolerated by rats
nd dogs at 350 ppm boron equivalent. Rats fed dietary boron compounds at
170 ppm levels showed toxic signs which were found to be similar to those
bserved in subchronic studies. Testicular degeneration was also observed in
ats and dogs fed 1170 ppm levels. Reproduction studies revealed that rats
ed both borax and boric acid at 1170 ppm boron equivalent were sterile.
oth compounds at 350 ppm boron equivalent had no adverse effect on
ertility, lactation, litter size, weight and appearance.
o it goes...
oe
n a message dated 3/9/2010 5:14:09 P.M. Pacific Standard Time,
[log in to unmask] writes:
Yes, I know about all the "good" health applications of boric acid.
owever, in low doses, I it does not kill you, but damages the reproductive
ystem - seems I read particularly males. Soooooo, that makes it a mutagen -
nd hence, "toxic". Remember my rant a month ago that started with "toxic
omputers". Never mind that its lethal oral does is comparable to table
alt - as you point in your post. Just remember the three catagories of
toxic" now -
PBT – Persistent, Bioaccumulative, and Toxic
CMR – Carcinogenic, Mutagenic, or toxic for Reproduction
vPvB – very Persistent and very Bioaccumulative
-----Original Message-----
rom: [log in to unmask]
o: [log in to unmask]
ent: Tue, Mar 9, 2010 7:02 pm
ubject: Re: [LF] More importantly.... 8 new substances proposed for REACH
ontrol
http://_www.stuffinanutshell.com/health/boricacid.html__
http://www.stuffinanutshell.com/health/boricacid.html_)
_http://www.stuffinanutshell.com/health/boricacid.html_
http://www.stuffinanutshell.com/health/boricacid.html) )
In a message dated 3/9/2010 3:58:38 P.M. Pacific Standard Time,
[log in to unmask] (mailto:[log in to unmask]) writes:
Thanks Nigel.
Here in the US, the Aerospace Industries Association EH&S committee sent
this around yesterday asking where these might be used. I am no expert
n
fiberglass, but boric acid is listed as an ingredient in E-Glass, that is
borosilicate glass. I am not sure REACh listing would cripple the supply
f
boric acid as an intermeidate, but the loss of E-glass in laminate would
probably be worse than the lead-free issue. Anyone on here a fiberglass
expert?
I think fluoroborate plating is way down in board fab, but may not be
gone.
Any further impacts to report from the world of circuit boards?
Denny Fritz
SAIC, Inc
-----Original Message-----
From: Nigel Burtt <[log in to unmask] (mailto:[log in to unmask]) >
To: [log in to unmask] (mailto:[log in to unmask])
Sent: Tue, Mar 9, 2010 4:16 pm
Subject: [LF] More importantly.... 8 new substances proposed for REACH
control
The eight substances suggested for consultation are:
Trichloroethylene
Boric acid
Disodium tetraborate, anhydrous
Tetraboron disodium heptaoxide, hydrate
Sodium chromate
Potassium chromate
Ammonium dichromate
Potassium dichromate
See:
_http://echa.europa.eu/doc/press/pr_10_03_svhc_consultation_20100308.pdf_
http://echa.europa.eu/doc/press/pr_10_03_svhc_consultation_20100308.pdf)
igel Burtt
NJAYBEE ASSOCIATES
EL: 44-8454-710989
OBILE: 44-7941-232900
KYPE: nigelburtt
ww.nigelburtt.co.uk | [log in to unmask]
mailto:[log in to unmask])
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask] (mailto:[log in to unmask])
______________________________________________________________________
---------------------------------------------------------------------------
---Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask]
mailto:[log in to unmask]) with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send:
SET Leadfree NOMAIL/(MAIL)
Search previous postings at: _http://listserv.ipc.org/archives_
http://listserv.ipc.org/archives)
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16_ (http://www.ipc.org/contentpage.asp?Pageid=4.3.16)
for additional information, or contact Keach Sasamori at [log in to unmask]
mailto:[log in to unmask]) or
847-615-7100 ext.2815
---------------------------------------------------------------------------
---
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask] (mailto:[log in to unmask])
______________________________________________________________________
------------------------------------------------------------------------------Leadfee
Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask]
mailto:[log in to unmask]) with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send:
ET
Leadfree NOMAIL/(MAIL)
Search previous postings at: _http://listserv.ipc.org/archives_
http://listserv.ipc.org/archives)
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16_ (http://www.ipc.org/contentpage.asp?Pageid=4.3.16)
or
additional information, or contact Keach Sasamori at [log in to unmask]
mailto:[log in to unmask]) or
847-615-7100 ext.2815
------------------------------------------------------------------------------
_____________________________________________________________________
his email has been scanned by the MessageLabs Email Security System.
or more information please contact helpdesk at x2960 or [log in to unmask]
_____________________________________________________________________
-------------------------------------------------------------------------------Leadfee
ail List provided as a service by IPC using LISTSERV 1.8d
o unsubscribe, send a message to [log in to unmask] with following text in
he BODY (NOT the subject field): SIGNOFF Leadfree
o temporarily stop/(start) delivery of Leadree for vacation breaks send: SET
eadfree NOMAIL/(MAIL)
earch previous postings at: http://listserv.ipc.org/archives
lease visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
dditional information, or contact Keach Sasamori at [log in to unmask] or
47-615-7100 ext.2815
------------------------------------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------
|
