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Iodine																				Related Pages
Synonyms & Trade Names
			Iodine crystals, Molecular iodine
CAS No.
			7553-56-2
	RTECS No.
			NN1575000
	DOT ID & Guide

FormulaI2
	Conversion
			1 ppm = 10.38 mg/m3
	IDLH
			2 ppmSee: 7553562

Exposure Limits
			NIOSH RELC 0.1 ppm (1 mg/m3)
					OSHA PEL C 0.1 ppm (1 mg/m3)
	Measurement Methods
			**NIOSH** 6005;**OSHA** ID212
					
					See: NMAM or OSHA Methods
										
Physical Description
			Violet solid with a sharp, characteristic odor.													
										
Molecular Weight253.8	
	Boiling Point365°F
	Melting Point236°F
	Solubility0.01%
	Vapor Pressure(77°F): 0.3 mmHg
	Ionization Potential9.31 eV											
Specific Gravity4.93	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Solid
Incompatibilities & Reactivities
			Ammonia, acetylene, acetaldehyde, powdered aluminum, active metals, liquid chlorine
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, nose; lacrimation (discharge of tears); headache; chest tightness; skin burns, rash; cutaneous hypersensitivity
Target Organs
			Eyes, skin, respiratory system, central nervous system, cardiovascular system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**Daily
							**Provide:**Eyewash (>7%), Quick drench (>7%)
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 1 ppm**: (APF = 10) Any supplied-air respirator***Up to 2 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*(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:** (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted acid gas canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.Any appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0167
					  MEDICAL TESTS: 0121

			
							

			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
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