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Iodine

Synonyms & Trade Names
Iodine crystals, Molecular iodine
CAS No.
7553-56-2
RTECS No.
NN1575000
DOT ID & Guide
Formula
I₂
Conversion
1 ppm = 10.38 mg/m3
IDLH
2 ppm
See: 7553562
Exposure Limits
NIOSH REL
C 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 Weight
253.8
Boiling Point
365°F
Melting Point
236°F
Solubility
0.01%
Vapor Pressure
(77°F): 0.3 mmHg
Ionization Potential
9.31 eV
Specific Gravity
4.93
Flash Point
NA
Upper Exposive Limit
NA
Lower Explosive Limit
NA
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

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