Immediately Dangerous To Life or Health (IDLH) Values
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Table of IDLH Values
Since the development of the original IDLH values in the 1970s and their subsequent revision in 1994, NIOSH has continued to review relevant scientific data and conduct research on methods for developing IDLH values. This has led to the development of Current Intelligence Bulletin (CIB) 66: Derivation of Immediately Dangerous to Life or Health (IDLH) [NIOSH 2014-100].
It is the goal of NIOSH to re-evaluate all IDLH values included in the list below using the guidelines and criteria included in CIB 66. Until this occurs, this list contains IDLH values based on both the 1994 revised criteria and CIB 66 [NIOSH 2014-100]. It is important to note which criteria was applied to develop a specific IDLH value. When a chemical entry contains more than one IDLH value, the IDLH value based on CIB 66 should be treated as current NIOSH policy.
Table of IDLH Values
IDLH Value (1994)*New/Updated Values Substance CAS no. (2016-present)** Acetaldehyde Acetic acid Acetic anhydride Acetone Acetonitrile Acetylene tetrabromide Acrolein Acrylamide Acrylonitrile 75-07-0 64-19-7 108-24-7 67-64-1 1975/5/8 79-27-6 107-02-8 1979/6/1 107-13-1 2,000 ppm50 ppm200 ppm2,500 ppm [LEL]500 ppm8 ppm2 ppm137 ppm (NIOSH Pub. No. 2017-203) 60 mg/m385 ppm60 ppm (NIOSH Pub. No. 2016-167)Aldrin Allyl alcohol Allyl chloride Allylglycidyl ether 2 Aminopyridine Ammonia Ammonium sulfamate n-Amyl acetate sec-Amyl acetate Aniline o-Anisidine p-Anisidine Antimony compounds (as Sb) ANTU 309-00-2 107-18-6 107-05-1 106-92-3 504-29-0 7664-41-7 7773-06-0 628-63-7 626-38-0 62-53-3 90-04-0 104-94-9 7440-36-0 86-88-4 25 mg/m320 ppm 250 ppm50 ppm5 ppm300 ppm1,500 mg/m31,000 ppm1,000 ppm100 ppm50 mg/m350 mg/m350 mg Sb/m3100 mg/m3Arsenic (inorganic compounds, as 7440-38-2 As) (metal) Arsine Azinphosmethyl 7784-42-1 86-50-0 5 mg As/m33 ppm10 mg/m3Barium (soluble compounds, as Ba) 7440-39-3 Benzene 71-43-2 Benzonitrile 50 mg Ba/m3500 ppm Benzoyl peroxide Benzyl chloride Beryllium compounds (as Be) 94-36-0 100-44-7 7440-41-7 (metal) 1,500 mg/m310 ppm14 ppm (66 mg/m3) (NIOSH Pub. No. 2017-104) 4 mg Be/m3Boron oxide Boron trifluoride Bromine Bromine Pentafluoride Bromoform 1303-86-2 7637/7/2 7726-95-6 2,000 mg/m325 ppm3 ppm 75-25-2 850 ppm 1.7 ppm (NIOSH Pub. No. 2017-106) Butane 106-97-8 1,3-Butadiene 106-99-0 2,000 ppm [LEL]2-Butanone 2-Butoxyethanol n-Butyl acetate sec-Butyl acetate tert-Butyl acetate n-Butyl alcohol sec-Butyl alcohol tert-Butyl alcohol n-Butylamine tert-Butyl chromate n-Butyl Acrylate n-Butyl glycidyl ether n-Butyl mercaptan p-tert-Butyltoluene Cadmium dust (as Cd) 78-93-3 111-76-2 123-86-4 105-46-4 540-88-5 71-36-3 78-92-2 75-65-0 109-73-9 1189-85-1 141-32-2 2426/8/6 109-79-5 98-51-1 7440-43-9 (metal) 3,000 ppm700 ppm1,600 ppm (>10% LEL) (NIOSH Pub. No. 2016-174)2,000 ppm (10% LEL) (NIOSH Pub. No. 2017-107) 1,700 ppm [LEL]1,700 ppm [LEL]1,500 ppm [LEL]1,400 ppm [LEL]2,000 ppm1,600 ppm300 ppm15 mg Cr(VI)/m3 250 ppm500 ppm100 ppm113 ppm (NIOSH Pub. No. 2016-173) 9 mg Cd/m3
IDLH浓度[NIOSH 2014-100]
