Other Exposure Limits for Hydrogen Sulfide. NIOSH Recommended Exposure Limit (REL): 10 ppm, 10-minute ceiling. Concentration considered immediately dangerous to life and health (IDLH): 100 ppm. ACGIH ® recommends a threshold limit value (TLV ®) of 1 ppm as an 8-hour time weighted average (TWA) and a short-term exposure limit (STEL) of 5 ppm.

2024年11月1日 · ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Hydrogen sulfide. See annual publication for most recent information.

The revised IDLH for hydrogen sulfide is 100 ppm based on acute inhalation toxicity data in humans

2019年7月17日 · In February 2010, the American Conference of Governmental Industrial Hygienists (ACGIH ®) adopted a new Threshold Limit Value (TLV ®) recommendation for H 2 S, lowering the 8-hour TWA to 1.0 ppm, and the STEL to 5.0 ppm. The new TLV ® has forced many companies to reconsider exposure limit guidelines and alarm settings. A major issue is ...

HYDROGEN SULFIDE. CAS number: 7783-06-4. Synonyms: Hydrosulfuric acid; Stink damp; Sulfur hydride; Sulfureted hydrogen. Molecular formula: H 2 S. TLV–TWA, 1 ppm (1.4 mg/m 3) TLV–STEL, 5 ppm (7 mg/m 3) To view TLV and Documentation, you must be logged in as an ACGIH member or have previously purchased the documentation.

2019年11月26日 · What is the Acceptable Short-Term Exposure for H2S? The actual term, according to the American Council of Government Industrial Hygienists (ACGIH), is Threshold Limit Value-Short Term Exposure Limit (TLV-STEL). Short-Term Exposure Limit, or STEL, is used in common language.

Hydrogen sulfide is a highly flammable, explosive gas, and can cause possible life-threatening situations if not properly handled. Hydrogen sulfide gas burns and produces other toxic vapors and gases, such as sulfur dioxide. In addition to exposure to hydrogen sulfide in the air, exposure to liquid hydrogen sulfide can cause "blue skin" or ...

2025年1月27日 · ACGIH recommends a Threshold Limit Value-Short Term Exposure Limit (TLVSTEL) of 15 ppm (21 mg/m3 ) for hydrogen sulfide. The TLV-STEL is the IS-minute TWA exposure that should not be exceeded at any time during a workday even if the 8-hour TWA is within the TLV- TWA.

(ACGIH®) adopted a new threshold limit value (TLV®) recommendation for H 2S, lowering the 8-hour TWA to 1.0 ppm, and the STEL to 5.0 ppm. The new TLV® has forced many companies to reconsider exposure limit guidelines and alarm settings. A major issue is whether a company’s current instruments are capable of operation with alarms set to

2011年6月2日 · In February 2010, the American Conference of Governmental Industrial Hygienists (ACGIH®) adopted a new threshold limit value (TLV®) recommendation for H2S, lowering the 8-hour TWA to 1.0 ppm, and the STEL to 5.0 ppm. The new TLV® has forced many companies to reconsider exposure limit guidelines and alarm settings.