Other Chemicals
Fluorine Compounds: A fluorine compound is one that contains fluorine as an element in chemical combination, not as a free gas.
In confined spaces, welding or cutting involving fluxes, coverings, or other materials which contain fluorine compounds must be done in compliance with 1910.252(c)(4). The NIOSH (REL) and OSHA (PEL) Exposure limits for fluorine compounds the same: TWA 0.1 ppm (0.2 mg/m3).
Brazing and gas welding fluxes containing fluorine compounds must have cautionary warning labels to indicate that they contain fluorine compounds. The labels must indicate the hazards associated with fluorine compounds including eye and respiratory tract effects. One such cautionary wording recommended by the American Welding Society for brazing and gas welding fluxes reads as follows:
CAUTION--CONTAINS FLUORIDES--This flux, when heated, gives off fumes that may irritate eyes, nose, and throat.
- Avoid fumes--use only in well-ventilated spaces.
- Avoid contact of flux with eyes or skin.
- Do not take internally.
Hexavalent chromium (Cr(VI): Hexavalent chromium (Cr(VI)) is a toxic form of the element chromium and is generally man-made. Hexavalent chromium may be present in fumes generated during the production or welding of chrome alloys. Workplace exposure to Cr(VI) may cause the following health effects:
- lung cancer in workers who breathe airborne Cr(VI);
- irritation or damage to the nose, throat and lungs (respiratory tract) if Cr(VI) is inhaled; and
- irritation or damage to the eyes and skin if Cr(VI) contacts these organs.
Knowledge Check Choose the best answer for the question.
6-8. Which of the following is TRUE when welding using fluxes, coverings, or other materials which contain fluorine compounds?
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