IDLH immediately dangerous to life and health

Immediately Dangerous to Life and Health (IDLH). Not estabUshed foi acryhc acid value shown is the emergency response-planning guide-3 (ERPG-3) for exposure up to one hour without life-threatening effects. 

Immediately dangerous to life and health (IDLH) A condition that poses a threat of exposure to airborne contamination likely to cause death or immediate or delayed permanent adverse health effects, or that prevents escape. 

Another quantity frequently reported is the amount immediately dangerous to life and health (IDLH). Exposures to this quantity and above should be avoided under any circumstances. 

Immediately Dangerous to Life and Health (IDLH), also developed by OSHA, means a maximum airborne concentration from which one could escape within thirty minutes without any escape-impairing symptoms or any irreversible health effects. 

Real-time, low-level monitors (with alarm) are required for Lewisite operations. In their absence, an Immediately Dangerous to Life and Health (IDLH) atmosphere must be presumed. Laboratory operations conducted in appropriately maintained and alarmed engineering controls require only periodic low-level monitoring. 

The NIOSH immediately dangerous to life and health (IDLH) value (NIOSH 1994) is greater than the 30-min AEGL-3. NIOSH based their recommended exposure limit (REL) on the statement by Flury and Zernik (1931) that 45-54 ppm could be tolerated by man for 0.5 to 1 h without immediate or late effects. Although the Flury and Zernik (1931) data are based on animal studies, NIOSH did not apply a UF. 

In an open system with gas production, the volume of gas can be obtained from Equation 10.3, and the volume calculated either for a toxicity limit, as for example the level called Immediately Dangerous to Life and Health (IDLH) ... 

The strychnine oral reference dose (RfD) of 0.0003 mg/kg/ day or 0.02 mg/day for a 70 kg person is derived from the Seidl and Zbinden (1982) short-term to subchronic study by applying an uncertainty factor of 10,000. This factor accounts for extrapolation from a less than chronic to a chronic exposure study, extrapolation from animals to humans, and differences in sensitivity among the human population. An additional factor of 10 is used because an LOAEL/FEL (2.5 mg/kg/day) was utilized in the estimation of the RfD instead of an NOAEL. The immediately dangerous to life and health (IDLH) dose for strychnine by NIOSH REE is 0.15 mg/m and the current OSHA PEL is 0.15mg/m. ... 

As a first step in assisting the LEPCs, EPA identified approximately 400 EHSs largely on the basis of their immediately dangerous to life and health (IDLH) values developed by the National Institute for Occupational Safety and Health in experimental animals. Although several public and private groups, such as the Occupational Safety and Health Administration and the... 

As described earlier, the immediately dangerous to life and health (IDLH) level is the maximum concentration of a substance to which one can be exposed for 30 min without irreversible health effects or death. A lethal level is the concentration at which death is almost certain to occur. The IDLH values were determined by the National Institute for Occupational Safety and Health (NIOSH) for the purpose of respirator selection. Respirators provide protection against the inhalation of toxic or harmful materials and may he necessary in certain hazardous situations. 

The immediate concern about the presence of phosphine in doped oxide films was safety in handling these materials. The permissible exposure limit (PEL) set by OSHA is 0.3 ppm, and the concentration immediately dangerous to life and health (IDLH) is 200 ppm. All precautions must be taken when etching plasma PSG of BPSG wafers. A basket of twenty 3 inch wafers, 5000 angstroms thick, containing 5 wt. % phosphorus could release as much as 2500 ppm of phosphine or 12.5 times the IDLH. 

The EPA and OSHA regulations [A-1, A-2, and A-3] apply to facilities from which a release of hazardous material could occur, at or above the quantities specified, as shown in bold in Table 17.A.1. Also shown are the Immediately Dangerous to Life and Health [IDLH] concentrations (for 30-minute exposure) [A-4] the Lower Flammable Limits and Heats of Combustion for combustible materials and the EPA toxic, thermal-radiation, and overpressure endpoints for public-exposure evaluations. N/L indicates that the chemical is not listed in the pertinent document. Estimated values are shown with a superscript ( ). Where no inhalation-toxicity data were available, the oral dose that caused 50% fatalities is shown only to indicate qualitatively the systemic toxicity (for example, an oral LD50 of 1000 mg/kg would be considered relatively nontoxic). The data are for pure chemicals, except where otherwise indicated, that is, without added diluents. Additional hazardous-properties information can be obtained via the Sax No. [A-6]. 

One-tenth of the Immediately Dangerous to Life and Health [IDLH] value [A-4]. 

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