Phosphorus trichloride
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CAS
7719-12-2
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PCl3
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RTECS
TH3675000
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Synonyms & Trade Names
Phosphorus chloride
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DOT ID & Guide
1809 / 137
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Exposure
Limits
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NIOSH REL: TWA 0.2 ppm (1.5 mg/m3) ST 0.5 ppm (3 mg/m3)
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OSHA PEL†: TWA 0.5 ppm (3 mg/m3)
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IDLH
25 ppm
See: 7719122
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Conversion
1 ppm = 5.62 mg/m3
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Physical Description
Colorless to yellow, fuming liquid with an odor like hydrochloric acid.
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MW: 137.4
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BP: 169°F
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FRZ: -170°F
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Sol: Reacts
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VP: 100 mmHg
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IP: 9.91 eV
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Sp.Gr: 1.58
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Fl.P: NA
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UEL: NA
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LEL: NA
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Noncombustible Liquid; however, a strong oxidizer that may ignite combustibles upon contact.
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Incompatibilities & Reactivities
Water, chemically-active metals such as sodium & potassium, aluminum, strong nitric acid, acetic acid, organic matter [Note: Hydrolyzes in water to form hydrochloric acid and phosphoric acid.]
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Measurement Methods
NIOSH 6402
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH
Up to 10 ppm:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 25 ppm:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is 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 canister providing protection against the compound of concern¿/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, nose, throat; pulmonary edema; eye, skin burns
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Target Organs
Eyes, skin, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0696 See MEDICAL TESTS: 0191
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