Tellurium hexafluoride (as Te)

NIOSH REL: 0.02 ppm (0.1 mg/m³) TWA

Current OSHA PEL: 0.02 ppm (0.2 mg/m³) TWA

1989 OSHA PEL: Same as current PEL

1993­1994 ACGIH TLV: 0.02 ppm (0.10 mg/m³) TWA

Description of substance: Colorless gas with a repulsive odor.

LEL :. . Nonflammable Gas

Original (SCP) IDLH: 1 ppm

Basis for original (SCP) IDLH: The chosen IDLH is based on the statements by ACGIH [1971] that "animals showed evidence of pulmonary edema (disturbed breathing) at the lowest exposure tested, 1 ppm for 4 hours; a 1­hour exposure at 1 ppm produced greatly accelerated respiration but no mortality" [Kimmerle 1960]. The IDLH has been conservatively set, but no other data on acute inhalation toxicity are available on which to base an IDLH. Exposure for 4 hours to higher concentrations (5, 10, 25, 50, and 100 ppm) invariably proved fatal to all exposed animals [Kimmerle 1960].

Short­term exposure guidelines: None developed

ACUTE TOXICITY DATA:

Lethal concentration data:

Other animal data: It has been reported that animals showed evidence of pulmonary edema (disturbed breathing) at the lowest exposure tested, 1 ppm for 4 hours; a 1­hour exposure at 1 ppm produced greatly accelerated respiration but no mortality [Kimmerle 1960].

Human data: None relevant for use in determining the revised IDLH.

REFERENCES:

1. ACGIH [1971]. Tellurium hexafluoride. In: Documentation of the threshold limit values for substances in workroom air. 3rd ed. Cincinnati, OH: American Conference of Governmental Industrial Hygienists, p. 246.

2. Kimmerle G [1960]. Vergleichende untersuchungen der inhalationstoxicitat von schwefel­, selen­ und tellurhexafluorid. Arch Toxikol 18:140­144 (in German).