Edouard Bastarache on mon 21 aug 00
Hello Tony,
Vanadium compounds have a variable toxicity.They act chiefly as an irrita=
nt
to the eyes and respiratory tract. Acute and chronic exposure can give ri=
se
to
conjunctivitis, rhinitis, reversible irritation of the respiratory tract,
and to bronchitis,
bronchospasms, and asthma-like diseases in more severe cases.
Though certain workers believe that it is only the pentoxide which is
harmful,
other investigators have found that patronite dust (chiefly vanadium
sulfide)
is quite toxic to animals, causing acute pulmonary edema.
I do not know the composition of the ore or the dust these miners
are exposed to, but if they are exposed to vanadium pentoxide,
here is the way it goes:
Vanadium pentoxide:
Fume is recognized as being generally more toxic than dust because of the
smaller particle size of fume, which allows more complete penetration to =
the
small
airways of the lungs.The absorption of V2O5 by inhalation is nearly 100%.
Poison by ingestion, inhalation, and other routes of entry(experimental)
like
intraperitoneal, sub-cutaneous, intrathecal and intravenous.
Human systemic effects by inhalation:
-bronchiolar constriction,
-including asthma,
-cough,
-dyspnea(shortness of breath),
-sputum,
-conjonctiva irritation.
A respiratory irritant.
It causes skin pallor, greenish-black tongue, chest pain, dyspnea,
palpitation,
lung changes.
When ingested it causes gastrointestinal tract disturbances.
It may also cause a papular skin rash.
An experimental teratogen, experimental reproductive effects,
mutagenic data.
When heated to decomposition it emits acrid smoke and irritating fumes of
VOx.
References:
1-Dangerous Properties of Industrial Materials by Sax and Lewis.
2-Chemical Hazards of the Workplace by Proctor and Hughes.
As for delayed healing of skin wounds, I have not found anything in the
medical
literature.
Later,
Edouard Bastarache M.D.( Occupational & Envirnmental Medicine)
Dans / In "La Belle Province"
edouardb@sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/~edouardb/
-----Message d'origine-----
De : Tony Hansen
=C0 : CLAYART@LSV.CERAMICS.ORG
Date : 21 ao=FBt, 2000 22:30
Objet : Vanadium toxicity
>Here is a frightening story I got in an email today:
>
>>I have been working for a vanadium mine in South Africa for five years.
They
>>they told us that vanadium holds absolutely no health risk to the human
>>boddy.
>>But a lot of the guys as well as myself find that after working in the
>>smelter for about seven to sixteen hours that we are coughing up blood.
>>As well as having severe chest pain. And when you have many open wounds
>>and come in contact with V2O5 powder it will not heal for a long period=
of
>>time.
>
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D
>T o n y H a n s e n thansen@digitalfire.com
>http://digitalfire.com Calculation/Database Software for Ceramic Industr=
y
>http://ceramicsearch.com Search engine for the Ceramic Industry
>
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Tony Hansen on mon 21 aug 00
Here is a frightening story I got in an email today:
>I have been working for a vanadium mine in South Africa for five years. They
>they told us that vanadium holds absolutely no health risk to the human
>boddy.
>But a lot of the guys as well as myself find that after working in the
>smelter for about seven to sixteen hours that we are coughing up blood.
>As well as having severe chest pain. And when you have many open wounds
>and come in contact with V2O5 powder it will not heal for a long period of
>time.
====================================================
T o n y H a n s e n thansen@digitalfire.com
http://digitalfire.com Calculation/Database Software for Ceramic Industry
http://ceramicsearch.com Search engine for the Ceramic Industry
friedlover on tue 22 aug 00
This is always the most amazing source of information. I was just logging
onto this site to clear my email, before looking for sources to order
Vanadium!
Does fume toxicity refer to fumes from the kiln when glazes containing this
are fired? Is the toxicity the reason I can't find this coloring item
readily available?
Should I be warned off this idea?
As always, thanks for all your kind assistance.
Rhonda Fried Friedlover@msn.com
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