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| Ethyl mercaptan | CAS 75-08-1 | ||
| CH3CH2SH | RTECS K19625000 | ||
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Synonyms & Trade Names Ethanethiol, Ethyl sulfhydrate, Mercaptoethane |
DOT ID & Guide 2363 130 |
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Exposure Limits |
NIOSH REL: C 0.5 ppm (1.3 mg/m3) [15-minute] | ||
| OSHA PEL�: C 10 ppm (25 mg/m3) | |||
| IDLH 500 ppm | Conversion 1 ppm = 2.54 mg/m3 | ||
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Physical Description Colorless liquid with a strong, skunk-like odor. [Note: A gas above 95°F.] |
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MW: 62.1 |
BP: 95°F |
FRZ: -228°F |
Sol: 0.7% |
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VP: 442 mmHg |
IP: 9.29 eV |
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Sp.Gr: 0.84 |
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Fl.P: -55°F |
UEL: 18.0% |
LEL: 2.8% |
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| Class IA Flammable Liquid: Fl.P. below 73�F and BP below 100�F. | |||
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Incompatibilities & Reactivities Strong oxidizers [Note: Reacts violently with calcium hypochlorite.] |
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Measurement Methods NIOSH 2542 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH Up to 5 ppm: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)/(APF = 10) Any supplied-air respirator Up to 12.5 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s) Up to 25 ppm: (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode/(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 500 ppm: (APF = 1000) Any supplied-air respirator operated in a pressure-demand or other positive-pressure mode Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation mucous membrane; headache, nausea; in animals: incoordination, lassitude (weakness, exhaustion); liver, kidney damage; cyanosis; narcosis | |
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Target Organs
Eyes, respiratory system, liver, kidneys, blood |
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| See also: INTRODUCTION |