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         1. NIOSH Pocket Guide to Chemical Hazards
      Phosphorus (yellow)
      Print
        Phosphorus (yellow)
            Related Pages
                Synonyms & Trade Names
                  Elemental phosphorus, White phosphorus
                CAS No.
                  7723-14-0
                RTECS No.
                  TH3500000
                DOT ID & Guide
                  1381 136
                Formula
                  P₄
                Conversion
                IDLH
                  5 mg/m3
                  See: 7723140
                Exposure Limits
                  NIOSH REL
                  TWA 0.1 mg/m3
                  OSHA PEL
                  TWA 0.1 mg/m3
                Measurement Methods
                  NIOSH 7905
                  See: NMAM or OSHA Methods
                Physical Description
                  White to yellow, soft, waxy solid with acrid fumes in air. [Note: Usually shipped or stored in water.]
                Molecular Weight
                  124.0
                Boiling Point
                  536°F
                Melting Point
                  111°F
                Solubility
                  0.0003%
                Vapor Pressure
                  0.03 mmHg
                Ionization Potential
                  ?
                Specific Gravity
                  1.82
                Flash Point
                  ?
                Upper Explosive Limit
                  ?
                Lower Explosive Limit
                  ?
                  Flammable Solid
                Incompatibilities & Reactivities
                  Air, oxidizers (including elemental sulfur & strong caustics), halogens [Note: Ignites SPONTANEOUSLY in moist air.]
                Exposure Routes
                  inhalation, ingestion, skin and/or eye contact
                Symptoms
                  irritation eyes, resp 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
                Personal Protection/Sanitation
                (See protection codes)
                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
                Important additional information about respirator selection
                See also
                INTRODUCTION ICSC CARD: 0628 MEDICAL TESTS: 0188
      Page last reviewed: October 30, 2019
        Content source: National Institute for Occupational Safety and Health
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