Toxic Exposure Limits: Hydrogen chloride
ERPG to NRC Vol2
Toxic chemical exposure limits for hazardous gases and vapors, combining ERPG (Emergency Response Planning Guidelines: ERPG-1/2/3), IDLH (Immediately Dangerous to Life or Health), TLV-TWA (ACGIH Threshold Limit Value, time-weighted average), and NRC Spacecraft Maximum Allowable Concentration (SMAC) limits for 60-min, 24-hr, and 90-day continuous exposure. Covers ~49 chemicals under the ERPG framework and ~30 under NRC SMAC. Data from Perry's Chemical Engineers' Handbook 8th Ed., Tables 23-16 and 23-17.
| chemical name | exposure framework | cas number | erpg 1 (ppm or mg/m3) | erpg 2 (ppm or mg/m3) | erpg 3 (ppm or mg/m3) | exposure 60min ppm (ppm) | idlh (ppm or mg/m3) | nrc volume | tlv twa (ppm or mg/m3) |
|---|---|---|---|---|---|---|---|---|---|
| Hydrogen chloride | ERPG | 7647-01-0 | 3 ppm | 20 ppm | 150 ppm | — | 50 ppm | — | 5 ppm C |
| Hydrogen chloride | NRC Vol2 | 7647-01-0 | — | — | — | 2 | — | 2 | — |
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