| Use | *MANUFACTURE OF HYDRIODIC ACID, MANUFACTURE OF ORG IODO CMPD, TO REMOVE IODINE FROM IODO CMPD [R1]
EXPECTORANT; CHEM INTERMED FOR INORGANIC IODIDES & ORGANIC SYNTHESIS [R5]
FORMERLY USED FOR ITS EXPECTORANT ACTION IN CHRONIC BRONCHITIS & BRONCHIAL ASTHMA TO LIQUEFY THICK, TENACIOUS SPUTUM. /HYDRIODIC ACID, SYRUP/ [R3]
MANUFACTURE OF DISINFECTANTS; THE 57% ACID IS ... USED FOR ANALYTICAL PURPOSES, SUCH AS METHOXYL DETERMINATIONS /HYDRIODIC ACID SYRUP/ [R6, 1268]
PROD: *(1972) GREATER THAN 4.54X10+5 G [R5]
(1975) GREATER THAN 4.54X10+5 G [R5]
| Apparent Color | COLORLESS GAS
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| Odor | PUNGENT ODOR
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| Boiling Point | -35.1 DEG C @ 760 MM HG
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| Melting Point | -50.8 DEG C
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| Molecular Weight | 127.93
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| Density | 5.66 @ 0 DEG C
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| Consumption Patterns | CORR: *ATTACKS NATURAL RUBBER
CTP: +CRITICAL TEMP: 152.0 DEG C; CRITICAL PRESSURE: 82.0 ATM
DEN: *5.66 @ 0 DEG C; 5.23 G/L @ 25 DEG C
PH: *1.0 strong acid /Solution (Hydriodic acid)/
SOL: *234 G IN 100 G H2O @ 10 DEG C; *Soluble in alcohol
OCPP: *SPECIFIC HEAT: 0.0545 CAL/G/DEG C @ 25 DEG C; REACTS WITH LOWER ALIPHATIC ALCOHOLS FORMING CORRESPONDING IODO CMPD; FORMS AN AZEOTROPE WITH WATER; FUMES IN MOIST AIR; ATTACKS NATURAL RUBBER; FORMS COLORLESS LIQUID @ ATMOSPHERIC PRESSURE WHEN COOLED WITH DRY ICE & ETHER OR OTHER COOLING MIXTURE
SPECIFIC GRAVITY: 2.85 @ -4.7 DEG C (LIQUID)
IT IS 4.4 TIMES AS HEAVY AS AIR
Heat of fusion= 0.686
Pale yellow liquid /Hydriodic acid/
Strong corrosive acid /Solution (Hydriodic acid)/
900 G SOL IN 100 G H2O @ 0 DEG C
DOT: +Health Hazards: Poisonous; may be fatal if inhaled or absorbed through skin. Contact may cause burns to skin and eyes. Contact with liquid may cause frostbite. Runoff from fire control or dilution water may cause pollution. /Hydrogen iodide, anhydrous/ [R7,p. G-15]
Fire or Explosion: Some of these materials may burn, but none of them ignites readily. Cylinder may explode in heat of fire. /Hydrogen iodide, anhydrous/ [R7,p. G-15]
Emergency Action: Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind, out of low areas, and ventilate closed spaces before entering. Self-contained breathing apparatus (SCBA) and structural firefighter's protective clothing will provide limited protection for short-term exposure to these materials. Fully-encapsulated protective clothing should be worn for spills and leaks with no fire. Evacuate the leak or spill area immediately for at least 50 feet in all directions. CALL CHEMTREC AT 1-800-424-9300 AS SOON AS POSSIBLE, especially if there is no local hazardous materials team available. /Hydrogen iodide, anhydrous/ [R7,p. G-15]
Fire: Small Fires: Dry chemical, CO2 or Halon. Large Fires: Water spray, fog or standard foam is recommended. Do not get water inside container. Move container from fire area if you can do it without risk. Cool containers that are exposed to flames with water from the side until well after fire is out. Stay away from ends of tanks. Isolate area until gas has dispersed. /Hydrogen iodide, anhydrous/ [R7,p. G-15]
Spill or Leak: Stop leak if you can do it without risk. Use water spray to reduce vapor; do not put water directly on leak or spill area. Small Spills: Flush area with flooding amounts of water. Large Spills: Dike far ahead of liquid spill for later disposal. Do not get water inside container. Isolate area until gas has dispersed. /Hydrogen iodide, anhydrous/ [R7,p. G-15]
First Aid: Move victim to fresh air and call emergency medical care; if not breathing, give artificial respiration; if breathing is difficult, give oxygen. Remove and isolate contaminated clothing and shoes at the site. In case of contact with material, immediately flush skin or eyes with running water for at least 15 minutes. Keep victim quiet and maintain normal body temperature. Effects may be delayed; keep victim under observation. /Hydrogen iodide, anhydrous/ [R7,p. G-15]
Health Hazards: Contact causes burns to skin and eyes. If inhaled, may be harmful. Fire may produce irritating or poisonous gases. Runoff from fire control or dilution water may cause pollution. /Hydrogen iodide, solution/ [R7,p. G-60]
Fire or Explosion: Some of these materials may burn, but none of them ignites readily. Flammable/poisonous gases may accumulate in tanks and hopper cars. Some of these materials may ignite combustibles (wood, paper, oil, etc). /Hydrogen iodide, solution/ [R7,p. G-60]
Emergency Action: Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Self-contained breathing apparatus (SCBA) and structural firefighter's protective clothing will provide limited protection. CALL CHEMTREC AT 1-800-424-9300 FOR EMERGENCY ASSISTANCE. If water pollution occurs, notify the appropriate authorities. /Hydrogen iodide, solution/ [R7,p. G-60]
Fire: Some of these materials may react violently with water. Small Fires: Dry chemical, CO2, Halon, water spray or standard foam. Large Fires: Water spray, fog or standard foam is recommended. Move container from fire area if you can do it without risk. Cool containers that are exposed to flames with water from the side until well after fire is out. Stay away from ends of tanks. /Hydrogen iodide, solution/ [R7,p. G-60]
Spill or Leak: Do not touch spilled material; stop leak if you can do it without risk. Small Spills: Take up with sand or other noncombustible absorbent material and place into containers for later disposal. Small Dry Spills: With clean shovel place material into clean, dry container and cover; move containers from spill area. Large Spills: Dike far ahead of liquid spill for later disposal. /Hydrogen iodide, solution/ [R7,p. G-60]
First Aid: Move victim to fresh air; call emergency medical care. Remove and isolate contaminated clothing and shoes at the site. In case of contact with material, immediately flush skin or eyes with running water for at least 15 minutes. Keep victim quiet and maintain normal body temperature. /Hydrogen iodide, solution/ [R7,p. G-60]
NFPA: *Flammability: 3. 3= Liquids that can be ignited under almost all normal temp conditions. Water may be ineffective on these liq because of their low flash points. Solids that form coarse dusts, solids in shredded or fibrous form that create flash fires, solids that burn rapidly, usually because they contain their own oxygen, and any material that ignites spontaneously at normal temp in air. [R8,p. 49-52]
Reactivity: 0. 0= Materials that are normally stable even under fire exposure conditions and that are not reactive with water. Normal fire fighting procedures may be used. [R8,p. 49-52]
Health: 0. 0= Materials that on exposure under fire conditions would offer no health hazard beyond that of ordinary combustible material. [R8,p. 49-52]
FIRP: *USE WATER ON FIRES IN WHICH HYDRIODIC ACID IS INVOLVED. NEUTRALIZE WITH CHEMICALLY BASIC SUBSTANCES SUCH AS SODIUM BICARBONATE, SODA ASH, OR SLAKED LIME. /HYDROGEN IODIDE 57% + WATER/ [R8,p. 49-52]
TOXC: *DANGEROUS; WHEN HEATED TO DECOMPOSITION, IT EMITS HIGHLY TOXIC FUMES OF IODIDES [R9]
REAC: *WILL REACT WITH WATER OR STEAM TO PRODUCE TOXIC & CORROSIVE FUMES. [R9]
MAGNESIUM BURNS MOMENTARILY IN HYDROGEN IODIDE. WHEN HYDROGEN IODIDE IS PASSED THROUGH FUMING NITRIC ACID, EACH BUBBLE PRODUCES A RED FLAME WITH SEPARATION OF IODIDE. POTASSIUM BURNS MOMENTARILY IN HYDROGEN IODIDE; THE FLAME THEN GOES OUT. MOLTEN POTASSIUM CHLORATE IGNITES IN HYDROGEN IODIDE. [R8,p. 491M-122]
A very violent explosion results when a mixture of potassium and hydrogen iodide is struck by a hammer. [R8,p. 491M-169]
DCMP: *DANGEROUS; WHEN HEATED TO DECOMPOSITION, IT EMITS HIGHLY TOXIC FUMES OF IODIDES [R9]
/IF/ ... DECOMP IN SIMPLE AQUEOUS SOLN ... FREE IODINE ... LIBERATED. [R6, 1239]
SERI: *STRONG IRRITANT /HYDROGEN IODIDE 57% + WATER/ [R8,p. 49-52]
The vapors of hydrogen iodide are severly irritating to the mucous membranes of the eyes and nose. [R10]
OPRM: *SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emmissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.
Contact lens use in industry is controversial. A survey of 100 corporations resulted in the recommendation that each company establish their own contact lens use policy. One presumed hazard of contact lens use is possible chemical entrapment. /It was/ found that contact lens minimized injury or protected the eye. The eye was afforded more protection from liquid irritants. Soft contact lenses do not worsen corneal damage from strong chemicals and in some cases could actually protect the eye. Overall, the literature supports the wearing of contact lenses in industrial environments as part of the standard eye protection, eg, face shields; however, more data are needed to establish the value of contact lenses. [R11]
SRP: Contact lenses should not be worn when working with this chemical.
SSL: +DECOMP BY LIGHT; FUMES IN MOIST AIR [R1]
SHIP: *No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless that material is properly classed, described, packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardous materials regulations (49 CFR 171-177)./ [R12]
Int'l Air Shipments: Chemical: Hydrogen iodide, anhydrous. IMO Class: 2. UN 2197. Additional packaging instructions listed in the table must also be followed. Hydrogen iodide, anhydrous is forbidden for transport on passenger and cargo aircraft. [R13, 133]
International Water Shipments: Chemical: Hydrogen iodide, anhydrous. IMO Class: 2, Gases. UN 2197. Packaging Label(s) required: Nonflammable compressed gas, corrosive. Transportation of hydrogen iodide, anhydrous is limited on passenger vessels. [R14]
Domestic Transportation: Chemical: Hydriodic acid. Primary Hazard Class: Corrosive material. A corrosive material is any liquid or solid that can seriously destroy human skin tissue, or a liquid that produces a severe corrosion rate on steel. UN 1787. Label(s) required: Corrosive. Acceptable Modes of Transportation: Air, rail, road, and water. /Hydriodic acid/ [R15]
Int'l Air Shipments: Chemical: Hydriodic acid. IMO Class: 8. UN 1787. Primary hazard label: Corrosive (packaging group II). Additional packaging instructions listed in the table must also be followed. /Hydriodic acid/ [R13, 132]
International Water Shipments: Chemical: Hydriodic acid. IMO Class: 8, Corrosives. UN 1787. Packaging Group: II. Label(s) required: Corrosive. /Hydriodic acid/ [R16]
STRG: *MATERIALS THAT ARE TOXIC AS STORED OR THAT CAN DECOMPOSE INTO TOXIC COMPONENTS ... SHOULD BE STORED IN A COOL WELL VENTILATED PLACE, OUT OF THE DIRECT RAYS OF THE SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, & SHOULD BE PERIODICALLY INSPECTED. INCOMPATIBLE MATERIALS SHOULD BE ISOLATED. ... [R9]
DISP: *SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
HTOX: *EDEMA OF THE GLOTTIS NECESSITATING TRACHEOTOMY HAS OCCURRED. [R17]
Inhalation of hydrogen iodide causes irritation of the upper respiratory tract, and a concentration of about 35 ppm causes irritation of the throat after short exposure. More severe exposures result in pulmonary edema, and often in laryngeal edema. [R18]
/IF/ ... DECOMP IN SIMPLE AQUEOUS SOLN ... FREE IODINE ... LIBERATED, & IF TAKEN INTERNALLY ... IT IS IRRITATING TO THE ALIMENTARY TRACT. [R6, 1239]
IT ... MAY CAUSE INJURY BY VIRTUE OF ITS ACID NATURE ... [R19]
Skin contact with the vapor or liquid causes severe tissue irritation and necrosis. [R18]
ADE: *THE IODIDE ION IS EXCRETED IN PART BY THE BRONCHIAL GLANDS. ... /HYDRIODIC ACID SYRUP/ [R3]
ACTN: *... BELIEVED TO ACT REFLEXLY BY IRRITATING THE GASTRIC MUCOSA, WHICH IN TURN, STIMULATES RESP TRACT SECRETION. /HYDRIODIC ACID SYRUP/ [R20]
ALAB: *Method 414A: Leuco Crystal Violet Method. This method is applicable to iodide concentration of 50 to 6,000 ug/l and is capable of determining iodide in the presence of iodine. ... Iodide is selectively oxidized to iodine by the addition of potassium peroxymonosulfate. The iodine produced reacts instantaneously with colorless reagent containing 4,4',4"-methylidyntris (N,N-dimethylaniline) also known as leuco crystal violet dye. The developing color is sufficiently stable and adheres to Beer's law over a wide range of iodine. Chloride concentration greater than 200 mg/l may interfer with color development. Reduce this interference by diluting sample to contain less than 200 mg chloride ion/l. /Iodide/ [R21]
The catalytic reduction method is applicable to iodide concn of 80 ug/l or less. Iodide can be determined by using its ability to catalyze the reduction of ceric ions by arsenious acid. The effect is nonlinearly proportional to the amount of iodide present. The reaction is stopped after a specific time interval by the addition of ferrous ammonium sulfate. The resulting ferric ions are directly proportional to the remaining ceric ions and develop a relatively stable color complex with potassium thiocyanate. Results obtained by this method are reproducible on samples of Los Angeles source waters, and have been reported to be accurate to + or - 0.3 ug iodide ion/l on samples of Yugoslavian water containing from 0 to 14.0 ug iodide/l. /Total iodide/ [R22]
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