PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Nitric oxide 10102-43-9 1660
13.00
6.00
14.01
4.01
11.01
14.02
4.08
4.05
7.01
11.00
Formula Synonyms
NO NITRIC OXIDE, AMIDOGEN, OXO-, MONONITROGEN MONOXIDE, MONOXYDE D^AZOTE (DOT FRENCH), MONOXYDE D'AZOTE, COMPRIMÉ (DOT FRENCH), NITRIC OXIDE (NO), NITRIC OXIDE TRIMER, NITRIC OXIDE, COMPRESSED, NITROGEN MONOOXIDE, NITROGEN MONOXIDE, NITROGEN OXIDE, NITROGEN OXIDE (N4O4), NITROGEN OXIDE (NO), NITROGEN(II) OXIDE, NITROSYL RADICAL, OXIDO NÍTRICO (DOT SPANISH), OXIDO NÍTRICO, COMPRIMIDO (DOT SPANISH), OXYDE NITRIQUE (DOT FRENCH), OXYDE NITRIQUE, COMPRIMÉ (DOT FRENCH)
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
30.01 G -163.3 -151.74 750 -151.9 1.226
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.50 12 20
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
0.61 15 25
Technical Basis
A review of available sources identified acute toxicity data for nitric oxide. In addition, AEGLs for a similar chemical, nitrogen dioxide (CASRN: 10102-44-0), where evaluated for TEEL development. Data sources were selected according to the hierarchy listed in Table 3.1. The AEGLs for nitrogen dioxide were selected due to their priority among Protective Action Criteria (Section 1) and the NRC assessment that “The toxicity of NO is associated with methemoglobin formation and oxidation to NO2.” (pg. 168 of AEGL support documentation).
• PAC-1 = AEGL-1
• PAC-2 = AEGL-2
• PAC-3 = AEGL-3
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information: https://www.epa.gov/aegl/nitric-oxide-aegl-program
Nitric oxide: https://www.epa.gov/aegl/nitric-oxide-aegl-program
AEGLs for nitric dioxide (CASRN: 10102-44-0) retrieved from: https://www.epa.gov/aegl/nitrogen-dioxide-aegl-program
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.