Agent Name

Welding fumes (not otherwise specified)

Major Category

Other Uses


Pyrolysis Products


The 3 main types of arc welding are Tungsten Inert Gas (TIG), Metal Inert Gas (MIG), and Manual Metal Arc (MMA) or stick welding. The welding fume is mainly determined by the composition of the filler metal, not the composition of the parent metal. Of the metals in welding fume, hexavalent chromium and manganese are of greatest concern. Toxic gases may include carbon monoxide, nitrogen oxide, ozone, and phosgene. [Hendrick, p. 467-79] See the Process "Welding."


Based on six case-control studies, there is sufficient evidence for ocular melanoma in welders. [IARC 2012] See the occupational diseases linked to the following Job Tasks: Arc weld aluminum; Arc weld stainless steel; Decompose chlorinated solvents by UV light or heat from welding; Gas or arc weld on galvanized metal; Gas weld or cut in a confined space; Heat or machine chromium alloys; Heat or machine cobalt alloys; Heat or machine manganese alloys; Heat, machine, or spray lead products; Machine or weld on cadmium-alloyed or cadmium-plated steel; Use manganese-containing welding rods; Weld mild steel; Weld on metal painted with chlorinated polyester paint; and Weld or machine on beryllium-containing alloys.

Exposure Assessment
Explanatory Notes

NIOSH REL = lowest feasible conc.;

Adverse Effects
Chronic Bronchitis


IARC Carcinogen

Possible Carcinogen

Links to Other NLM Databases
Toxicity Information


Related Information in HazMap

Occupational diseases associated with exposure to this agent:


Industrial Processes with risk of exposure: