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Tellurium compounds (as Te)																				Related Pages
										May 1994
Immediately Dangerous to Life or Health Concentrations (IDLH)
**CAS number:** 13494–80–9 (Metal)
**NIOSH REL:** 0.1 mg/m3 TWA
**Current OSHA PEL:** 0.1 mg/m3 TWA
**1989 OSHA PEL:** Same as current PEL
**1993-1994 ACGIH TLV:** 0.1 mg/m3 TWA
**Description of substance:** Varies
**Original (SCP) IDLH*:** No Evidence [*Note: “Effective” IDLH = 50 mg Te/m3 — see discussion below.]
**Basis for original (SCP) IDLH:** Because no evidence of an IDLH for tellurium is shown in the available toxicological data, respirators have been selected on the basis of the assigned protection factor afforded by each device up to 500  ́ the OSHA PEL of 0.1 mg Te/m3 (i.e., 50 mg Te/m3); only the “most protective” respirators are permitted for use in concentrations exceeding 50 mg Te/m3.
**Short-term exposure guidelines:** None developed
**ACUTE TOXICITY DATA:**
**Lethal dose data:**

**Species**
    **Reference**
    **Route**
    **LD50** **(mg/kg)**
    **LDLo** **(mg/kg)**
    **Adjusted LD**
    **Derived value**Te: Rat
    Izmerov et al. 1982
    oral
    83
    -----
    581 mg Te/m3
    58 mg Te/m3Te: Mouse
    Izmerov et al. 1982
    oral
    20
    -----
    140 mg Te/m3
    14 mg Te/m3Te: Rabbit
    Izmerov et al. 1982
    oral
    67
    -----
    469 mg Te/m3
    47 mg Te/m3G. pig
    Izmerov et al. 1982
    oral
    45
    -----
    315 mg Te/m3
    32 mg Te/m3TeO6H6 Rabbit
    Muehlberger &Schrenk 1928
    oral
    56
    -----
    392 mg Te/m3
    39 mg Te/m3**Human data:** None relevant for use in determining the revised IDLH.
 
 **Revised IDLH:** 25 mg Te/m3**Basis for revised IDLH:** No inhalation toxicity data are available on which to base an IDLH for tellurium compounds. Therefore, the revised IDLH for tellurium compounds is 25 mg Te/m3 based on acute oral toxicity data in animals [Izmerov et al. 1982; Muehlberger and Schrenk 1928].**REFERENCES:**
1. Izmerov NF, Sanotsky IV, Sidorov KK [1982]. Toxicometric parameters of industrial toxic chemicals under single exposure. Moscow, Russia: Centre of International Projects, GKNT, p. 107.
2. Muehlberger CW, Schrenk HH [1928]. The effect of the state of oxidation on the toxicity of certain elements. J Pharmacol Exp Ther *33*:270-271.

			
							
								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
Abbreviations for Journal Titles Follow NIOSH Facebook
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