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Tellurium hexafluoride (as Te)																				Related Pages
										May 1994
Immediately Dangerous to Life or Health Concentrations (IDLH)
**CAS number:** 7783–80–4
**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
**1993-1994 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 1-hour 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].
**Short-term exposure guidelines:** None developed
**ACUTE TOXICITY DATA:**
**Lethal concentration data:**

**Species**
    **Reference**
    **LC50** **(ppm)**
    **LCLo** **(ppm)**
    **Time**
    **Adjusted 0.5-hr** **LC (CF)**
    **Derived value**Rat MouseRabbitG. pig
    Kimmerle 1960 Kimmerle 1960Kimmerle 1960Kimmerle 1960
    ----- ---------------
    5 555
    4 hr 1 hr4 hr4 hr
    10 ppm (2.0) 6.3 ppm (1.25)10 ppm (2.0)10 ppm (2.0)
    1.0 ppm 0.6 ppm1.0 ppm1.0 ppm**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 1-hour exposure at 1 ppm produced greatly accelerated respiration but no mortality [Kimmerle 1960].
 **Human data:** None relevant for use in determining the revised IDLH.
 
 **Revised IDLH:** 1 ppm [Unchanged] **Basis for revised IDLH:** Based on acute inhalation toxicity data in animals [Kimmerle 1960], the original IDLH for tellurium hexafluoride (1 ppm) is not being revised at this time.**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*:140-144 (in German).

			
							
								Page last reviewed:  December 4, 2014						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Publications & Products
Immediately Dangerous To Life or Health (IDLH) Values
Table of IDLH Values
Criteria for Determining IDLH Values
Historical Documentation
Original (SCP) Values
Abbreviations for IDLH Documentation
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