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Phosphorus (yellow)																				Related Pages
Synonyms & Trade Names
			Elemental phosphorus, White phosphorus
CAS No.
			7723-14-0
	RTECS No.
			TH3500000
	DOT ID & Guide
			1381 136

FormulaP4
	Conversion
	IDLH
			5 mg/m3See: 7723140

Exposure Limits
			NIOSH RELTWA 0.1 mg/m3OSHA 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 Weight124.0	
	Boiling Point536°F
	Melting Point111°F
	Solubility0.0003%
	Vapor Pressure0.03 mmHg
	Ionization Potential?											
Specific Gravity1.82	
	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 NIOSH Pocket Guide to Chemical Hazards
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
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