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Iodine


   General
   Physical data
   Stability
   Toxicology
   Personal protection

General

 
    Synonyms:
    Molecular formula: I2
    CAS No: 7553-56-2
    EC No: 231-442-4
    EU No: 053-001-00-3

Physical data

 

Appearance: Purple to black crystals
Melting point: 113 - 114 C
Boiling point: 183 C
Specific gravity: 4.93
Vapour pressure: 0.31 mm Hg at 25 C
Vapour density: 9.0 (air = 1)
Flash point: n/a
Explosion limits: n/a
Autoignition temperature:

Stability

 

Stable. Oxidizer. Substances to be avoided include strong reducing agents, powdered metals, ammonia, ammonium salts, acetylene, acetaldehyde, combustible materials, aluminium, chemically active metals, carbides, turpentine oils, azides, carbides, ammonium hydroxide, sodium thiosulfate. Sublimes slightly at room temperature.

Toxicology

 

Toxic - may be fatal if swallowed or inhaled. Corrosive, causes burns. Harmful by inhalation and through skin absorption. UK OES short-term 1 mg/m3 (0.1 ppm). Readily absorbed through skin. Very destructive of mucous membranes and upper respiratory tract, eyes and skin. Severe irritant. Sublimes at room temperature to yield dangerous levels of vapour. May cause sensitization. May cause damage to the unborn child.

Toxicity data
(The meaning of any abbreviations which appear in this section is given here.)
ORL-HMN LDLO 28 mg kg-1
ORL-RAT LD50 14000 mg kg-1 (? Although quoted by a reputable chemical supplier, this value looks unreasonably high compared to that given for humans. However, the same supplier quotes an ORL-MUS LD50 of 22000 mg kg-1, and ORL-RBT LD50 of 10000 mg kg-1.)
UNR-MAN LDLO 29 mg kg-1

Risk phrases

R21- Harmful in contact with skin
R23- Toxic by inhalation
R25- Toxic if swallowed
R34- Causes burns
 

Personal protection

 

Safety glasses, nitrile gloves. Effective ventilation.

Safety phrases

S23- Do not breathe vapour,
S25- Avoid contact with eyes
 


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