SDS

SDS: Problem Solver USF
October 1, 2014
Page 6 of 9
The following limits can be used as guidance. Refer to Section 11 for more information about welding fumes.
CAS
Exposure Limit (mg/m
3
)
Substance NUMBER OSHA PEL ACGIH-TLV
Iron Oxide
1309-37-1
10 (as Fe)
5 (as Fe)
Nitric Oxide
10102-43-9
30
31
Chromium (VI)
not listed
0.005
0.05 (as Cr VI)
Nickel Oxide #
1313-99-1
1 (as Ni)
0.2 (as Ni)
Manganese fume #
7439-96-5
5
0.02
Gaseous reaction products may include carbon monoxide and carbon dioxide. Ozone and nitrogen oxides may also be formed by
radiation from the arc. The fume limit for Cr VI (5 micrograms/m³) may be reached before the ACGIH recommended general
welding fume limit of 5 mg/m³ is reached. Monitor fume levels and Cr VI level. Train workers about the hazards of Cr (VI). Read
and comply with the OSHA permissible exposure limits for hexavalent chromium (CrVI), Fed. Reg. 71 – 10099 (specifically
29 CFR 1910.1026, 29 CFR 1915.1026, and 29 CFR 1926.1126). For CrVI, OSHA requires: “The employer
shall perform initial
monitoring to determine the 8-hour TWA exposure for each employee on the basis of a sufficient number of personal breathing zone
air samples to accurately characterize full shift exposure on each shift, for each job classification, in each work area”. Specialized
equipment is required for monitoring Cr (VI) concentration in the workplace. OSHA Analytical Method Number ID-215 for area
and breathing zone sampling and OSHA Analytical Method Number W4001 for wipe samples are listed on the OSHA website -
www.osha.gov -as methods for measuring Cr(VI). This standard is complex and the employer should contact an occupational
health professional for doing the Cr(VI) monitoring and all other fume monitoring.
Exposure limits are subject to change. Contact ACGIH, OSHA, NIOSH, and IARC for current values.
SECTION 9: PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE: Solid appearance, non volatile, wire with a flux coating. No odor. Not soluble in water.
MELTING POINT: > 1800 °F (> 1000 °C)
SECTION 10: STABILITY AND REACTIVITY
GENERAL: These items are only intended for normal welding purposes.
STABILITY: Stable under normal conditions.
HAZARDOUS POLYMERIZATION: Will not occur
REACTIVITY: Contact with chemical substances like acids or strong bases could cause generation of gas.
HAZARDOUS DECOMPOSITION OR BY-PRODUCTS:
Gaseous reaction products may include carbon monoxide and carbon dioxide. Ozone and nitrogen oxides may also be formed by
radiation from the arc.
Refer to applicable national exposure limits for the fume compounds. Reasonably expected fume constituents of the fume could
include complex oxides of iron, chromium, nickel and manganese. The employer should contact an occupational health
professional for doing fume monitoring to determine fumes emitted and to ensure compliance to the applicable country limits.
Manganese also has a low exposure limit listed in the USA. Other country exposure limits may be different and the appropriate
country standards should be used.
SECTION 11: TOXICOLOGICAL INFORMATION
Welding fumes cannot be classified simply. The composition and quantity of both are dependent upon the metal being welded, the
process, procedure, and the electrode 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 work area, the quality and the amount of ventilation, 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