SDS

Revision date: 11/10/2014
Hazardous decomposition
products:
Welding fumes and gases cannot be classified simply. The composition and
quantity of both are dependent upon the metal being welded, the process,
procedure and electrodes used. Other conditions which also influence the
composition and quantity of the fumes and gases to which workers may be
exposed include: coatings on the metal being welded (such as paint,
plating, or galvanizing), the number of welders and the volume of the
worker area, the quality and amount of ventilation, the position of the
welder's head with respect to the fume plume, as well as the presence of
contaminants in the atmosphere (such as chlorinated hydrocarbon vapors
from cleaning and degreasing activities.)
When the electrode is consumed, the fume and gas decomposition
products generated are different in percent and form from the ingredients
listed in Section 3. Decomposition products of normal operation include
those originating from the volatilization, reaction, or oxidation of the
materials shown in Section 3, plus those from the base metal and coating,
etc., as noted above. Reasonably expected fume constituents produced
during arc welding include the oxides of iron, manganese and other metals
present in the welding consumable or base metal. Hexavalent chromium
compounds may be in the welding fume of consumables or base metals
which contain chromium. Gaseous and particulate fluoride may be in the
welding fume of consumables which contain fluoride. Gaseous reaction
products may include carbon monoxide and carbon dioxide. Ozone and
nitrogen oxides may be formed by the radiation from the arc.
11. TOXICOLOGICAL INFORMATION
Information on likely routes of exposure
Ingestion:
Health injuries from ingestion are not known or expected under normal use.
Inhalation:
Potential chronic health hazards related to the use of welding consumables
are most applicable to the inhalation route of exposure. Refer to Inhalation
statements in Section 11.
Skin contact:
Arc rays can burn skin. Skin cancer has been reported.
Eye Contact:
Arc rays can injure eyes.
Symptoms related to the physical, chemical and toxicological characteristics
Inhalation:
Short-term (acute) overexposure to welding fumes may result in discomfort
such as metal fume fever, dizziness, nausea, or dryness or irritation of
nose, throat, or eyes. May aggravate pre-existing respiratory problems
(e.g. asthma, emphysema). Long-term (chronic) overexposure to welding
fumes can lead to siderosis (iron deposits in lung), central nervous system
effects, bronchitis and other pulmonary effects.
Information on toxicological effects
Acute toxicity (list all possible routes of exposure)
Oral
Product:
Not classified
Specified substance(s):
Iron
LD 50 (Rat): 98.6 g/kg
Dermal
Product:
Not classified
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