NIOSH Pocket Guide to Chemical Hazards

Phosphorus (yellow) CAS 7723-14-0
P4 RTECS TH3500000
Synonyms & Trade Names
Elemental phosphorus, White phosphorus
DOT ID & Guide
1381 136
NIOSH REL: TWA 0.1 mg/m3
OSHA PEL: TWA 0.1 mg/m3
IDLH 5 mg/m3 Conversion
Physical Description
White to yellow, soft, waxy solid with acrid fumes in air. [Note: Usually shipped or stored in water.]
MW: 124.0
BP: 536°F
MLT: 111°F
Sol: 0.0003%
VP: 0.03 mmHg
IP: ?

Sp.Gr: 1.82
Fl.P: ?
UEL: ?
LEL: ?

Flammable Solid
Incompatibilities & Reactivities
Air, oxidizers (including elemental sulfur & strong caustics), halogens [Note: Ignites SPONTANEOUSLY in moist air.]
Measurement Methods
NIOSH 7905
Personal Protection & Sanitation
Skin: Prevent skin contact* [*Note: Flame retardant personal protective equipment should be provided.]
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 1 mg/m3: (APF = 10) Any supplied-air respirator
Up to 2.5 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 5 mg/m3: (APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece
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: Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, respiratory tract; eye, skin burns; abdominal pain, nausea, jaundice; anemia; cachexia; dental pain, salivation, jaw pain, swelling
Target Organs Eyes, skin, respiratory system, liver, kidneys, jaw, teeth, blood