7553-56-2 Iodine

Name: Iodine
Synonyms: Actomar;DentaPure DP 90;Diatomic iodine;Diiodine;Eranol;Iodel FD;Iodine (127I2);Iodine colloidal;Iodine crystals;Iodine molecule (I2);Iodine sublimed;Iodomarin;Iosan Superdip;Jodosan;Molecular iodine;NSC 42355;Tegodyne;
CAS Number:7553-56-2
Molecular Formula:I₂
Molecular Weight:253.80
EINECS:231-442-4
Density:3.834 g/cm³
Boiling Point:184.3 °C at 760 mmHg
Flash Point:
Safety Description:A human poison by ingestion and possibly other routes. An experimental poison by intravenous and subcutaneous routes. Moderately toxic by inhalation. Human systemic effects by ingestion: diarrhea, evidence of thyroid hyperfunction. Experimental reproductive effects. Mutation data reported. The effect of iodine vapor upon the body is similar to that of chlorine and bromine, but it is more irritating to the lungs. Serious exposures are seldom encountered in industry due to the low volatility of the solid at ordinary room temperatures. Signs and symptoms are irritation and burning of the eyes, lachrymation, coughing, and irritation of the nose and throat. Ingestion of large quantities causes abdominal pain, nausea, vomiting, diarrhea. In severe cases, purging, excessive thirst, and circulatory failure may develop. Doses of 2–3 g have been fatal. Chronic ingestion of large amounts (200 mg/day) results in thyroid disease.

Explosive reaction with acetylene, antimony powder, hafnium powder + heat, tetraamine copper(II) sulfate + ethanol, trioxygen difluoride (possibly ignition), polyacetylene (at 113°C). Forms sensitive, explosive mixtures with potassium (impact- and heat-sensitive), sodium (shock-sensitive), oxygen difluoride (heat-sensitive). Reacts to form explosive products with ammonia, ammonia + lithium 1-heptynide, ammonia + potassium, butadiene + ethanol + mercuric oxide, silver azide.

Ignition on contact with bromine pentafluoride (or violent reaction), chlorine trifluoride, fluorine, metals (powdered) + water, aluminum-titanium alloys + heat, metal acetylides (e.g., cesium acetylide, copper(I) acetylide, lithium acetylide, rubidium acetylide), nonmetals (e.g., boron ignites at 700°C), phosphorus, sodium phosphinate. Violent reaction with acetaldehyde, aluminum + diethyl ether, dipropylmercury, titanium (above 113°C). Incandescent reaction with cesium oxide (above 150°C), bromine trifluoride, metal acetylides or carbides [e.g., barium acetylide (above 122°C), calcium acetylide (above 305°C), strontium acetylide (above 182°C), zirconium acetylide (above 400°C)].

Incompatible with ethanol, ethanol + butadiene, ethanol + phosphorus, ethanol + methanol + HgO, formamide + pyridine + sulfur trioxide, formamide, halogens or interhalogens (e.g., chlorine), mercuric oxide, metals (e.g., aluminum, lithium, magnesium), metal carbides (e.g., lithium carbide, zirconium carbide), oxygen, pyridine, sodium hydride, sulfides.

When heated to decomposition it emits toxic fumes of I⁻ and various iodine compounds. Reacts vigorously with reducing materials. See also IODIDES.

Analytical Methods:

   

For occupational chemical analysis use OSHA: #ID-177 or NIOSH: Iodine, 6005.
liansport Information:UN 2056