PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hydrogen cyanide; (Hydrocyanic acid) | 74-90-8 | 1614 |
17.00
15.01
4.01
11.01
4.08
4.05
7.01
8.00
11.00
4.09
|
|||||||||
| Formula | Synonyms | |||||||||||
| CHN | HYDROGEN CYANIDE, ANHYDROUS, STABILIZED (ABSORBED), ACIDO CIANHÍDRICO, ANHIDRO, ESTABILIZADO (ABSORBIDO) (DOT SP, ACIDO CIANHÍDRICO, ESTABILIZADO (ABSORBIDO) (DOT SPANISH), CARBON HYDRIDE NITRIDE (CHN), CIANURO DE HIDRÓGENO, ANHIDRO, ESTABILIZADO (ABSORBIDO) (DOT, CIANURO DE HIDRÓGENO, ESTABILIZADO (ABSORBIDO) (DOT SPANISH), CYANURE D^HYDROGÈNE, ANHYDRE, STABILISÉ (ABSORBÉ) (DOT FRENC, CYANURE D'HYDROGÈNE, STABILISÉ (ABSORBÉ) (DOT FRENCH), EVERCYN, FORMIC ANAMMONIDE, FORMONITRILE, HYDROCYANIC ACID, HYDROGEN CYANIDE, HYDROGEN CYANIDE, STABILIZED (ABSORBED), PRUSSIC ACID, HYDROCYANIC ACID, LIQUEFIED, HYDROCYANIC ACID SOLUTION, [< 5% HYDROCYANIC ACID], | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 27.03 | L or G | -13.29 | 26 | 750 | 25.4 | 0.6876 @ 20°C | 56000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 2.0 | 7.1 | 15 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 2.2 | 7.8 | 17 |
Technical Basis
A review of available sources identified AEGLs for this chemical. The AEGLs were selected due to their priority among Protective Action Criteria (Section 1).
• PAC-1 = AEGL-1
• PAC-2 = AEGL-2
• PAC-3 = AEGL-3
This review generated PAC values consistent with Rev. 29A*.
• PAC-1 = AEGL-1
• PAC-2 = AEGL-2
• PAC-3 = AEGL-3
This review generated PAC values consistent with Rev. 29A*.
References
AEGLs (Table 5-1) and chemical information (Table 5-2) retrieved from: https://www.epa.gov/aegl/hydrogen-cyanide-results-aegl-program