텔루르 헥사플루오르화물

2.499 @ -10 °C /Liquid/

Density: 4.006 @ -191 °C /solid/; sublimes @ -38.9 °C; not as inert chemically as selenium hexafluoride or sulfur hexafluoride because covalence max of tellurium is more than 6; slowly absorbed by water with hydrolysis to telluric acid, H6TeO6; more quickly hydrolyzed by aq potassium hydroxide

9.875 @25 °C

8.34(relative gas density)

Decomposes (NIOSH, 2024)

Decomp in cold, hot water, acid, and alkali

Decomposes

95.9 °F at 760 mmHg (EPA, 1998)

Sublimes

TOXIC GASES AND VAPORS (SUCH AS HYDROGEN FLUORIDE) MAY BE RELEASED WHEN TELLURIUM HEXAFLUORIDE DECOMPOSES.

When heated to decomp it emits very toxic fumes of /hydrogen fluoride and tellurium/.

Hydrolyzes slowly in water to telluric acid; is hydrolyzed more quickly by aqueous potassium hydroxide.

-35.7 °F (EPA, 1998)

MP: -37.6 °C @ > 1 atm /triple point/

-36 °F (Sublimes)

2.499 at 14 °F (EPA, 1998) - Heavier than air; will sink (Relative to Air)

8.3 (Air= 1 at boiling point of tellurium hexafluoride)

Greater than 760 mmHg (EPA, 1998)

>1 atm

760 [mm Hg] @20 °C

>1 atm

Container may explode in heat of fire. When heated to decomposition, it emits very toxic fumes of fluoride and tellurium. Decomposes in water, acid, and alkali. (EPA, 1998)

· Some may burn but none ignite readily.

Capable of causing death or permanent injury. Acute -- the material is highly toxic by inhalation exposure and a strong irritant to skin, eyes, the lungs, the throat, and stomach. Death can occur from filling of the lungs with fluid (pulmonary edema) or from asphyxiation due to spasm of the throat (larynx) or bronchi. Those with impaired pulmonary function, especially obstructive airway diseases are at a greater risk. (EPA, 1998)

· TOXIC and/or CORROSIVE; may be fatal if inhaled, ingested or absorbed through skin.

Estimated to be 2.5 times more toxic than ozone, tellurium hexafluoride causes pulmonary edema in experimental animals at relatively low concentrations. Two cases of poisoning occurred after a leak in a laboratory. Patients complained of metallic taste, rash, fatigue, and garlic odor of the breath and urine. [ACGIH] IDLH = 1 ppm; [NIOSH] See Tellurium.

2195 125

2195 125

Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and full protective clothing. Do not get water inside container. Move container from fire area if you can do so without risk. Stay away from ends of tanks. Spray cooling water on containers that are exposed to flames until well after fire is out. Isolate area until gas has dispersed.

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· Do not touch or walk through spilled material.

Signs and Symptoms of Acute Tellurium Hexafluoride Exposure: Signs and symptoms of acute exposure to tellurium hexafluoride may include drowsiness, malaise, lassitude, weakness, and dizziness. A metallic taste, garlicky breath, and profuse sweating may be noted. Kidney damage, liver injury, and pulmonary effects such as pulmonary edema and bronchial spasms may also occur. Gastrointestinal effects may include nausea, vomiting, anorexia, and constipation. Dermal exposure may result in dermatitis (red, inflamed skin).

General First Aid:

(General first aid procedures)

· Wear positive pressure self-contained breathing apparatus (SCBA).

Biological Exposure Indices (BEI) [ACGIH] - Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)

1.0 [mg/m3], as F, inhalable fraction[German Research Foundation (DFG)]

1. VENTILATE AREA OF LEAK TO DISPERSE GAS. 2. STOP FLOW OF GAS. IF SOURCE OF LEAK IS A CYLINDER & THE LEAK CANNOT BE STOPPED IN PLACE, REMOVE THE LEAKING CYLINDER TO A SAFE PLACE IN THE OPEN AIR, AND REPAIR THE LEAK OR ALLOW THE CYLINDER TO EMPTY.

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.

Not recommendable method: Thermal destruction. Peer review: Insoluble TE /tellurium/ cmpd should be solidified before landfill. /Insol tellurium cmpd/ (Peer-review conclusions of an IRPTC expert consultation (May 1985))

SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.

Excerpt from ERG Guide 125 [Gases - Toxic and/or Corrosive]:

Immediate precautionary measure

Small spill:

Small spill:

0.1 [mg/m3], as Te (2.5 mg/m3 as F)

8 Hr Time Weighted Avg (TWA): 0.02 ppm.

Excursion Limit Recommendation: Excursions in worker exposure levels may exceed three times the TLV-TWA for no more than a total of 30 min during a work day, and under no circumstances should they exceed five times the TLV-TWA, provided that the TLV-TWA is not exceeded.

0.1 [mg/m3], as Te (2.5 mg/m3 as F)

TWA 0.02 ppm (0.2 mg/m3)

Initial Medical Screening: Employees should be screened for history of certain medical conditions which might place the employee at increased risk from tellurium hexafluoride exposure. Chronic respiratory disease: Tellurium hexafluoride causes respiratory irritation. In persons with impaired pulmonary function, especially those with obstructed airway diseases, the breathing of tellurium hexafluoride might cause exacerbation of symptoms due to its irritant properties. Periodic Medical Examination: Any employee developing the above-listed conditions should be referred for further medical examination.

Two cases of excessive occupational exposure to tellurium hexafluoride were reported. Because both workers were also handling volatile liquid esters, some increased absorption & deposition of elemental tellurium in the skin may have occurred. The signs included garlic breath. An unusual feature was bluish black discoloration of the webs of the fingers & streaks on the face & neck. No permanent damage was noted ... .

Tellurium hexafluoride is also a respiratory irritant & has caused delayed pulmonary edema, anorexia, & somnolence. Victims of tellurium hexafluoride intoxication have been reported to have a bluish discoloration in the webs of the fingers.

Human exposure to /tellurium hexafluoride/ has caused headache, chest pain, & dyspnea.

Tellurium hexafluoride has caused headache, chest pain, and dyspnea. It is considered toxic by inhalation and may produce pulmonary edema and death.

Short term exposure of experimental rodents to airborne concentrations of tellurium hexafluoride produced evidence of pulmonary edema. The animals exposed to 1 ppm for 4 hr were adversely affected. Those exposed for 1 hr to 1 ppm had an increased respiratory rate; however, repeated exposure to 1 ppm for 5 days produced no effect.

ACUTE INHALATION TOXICITY STUDIES OF SMALL NUMBERS OF 4 ANIMAL SPECIES /RABBIT, GUINEA PIG, RAT & MOUSE, AT 100, 50, 25, 10, 5, 1 PPM FOR 4 HR/ SHOWED EVIDENCE OF PULMONARY EDEMA (DISTURBED BREATHING) AT THE LOWEST EXPOSURE TESTED, 1 PPM FOR 4 HR; ALL OTHER EXPOSURES ... FATAL TO ... EXPOSED ... .

/RABBITS, GUINEA PIGS, RATS, & MICE/ ... 1-HR EXPOSURE @ 1 PPM PRODUCED HYPERPNEA BUT NO MORTALITY. A DAILY REPEATED 1-HR EXPOSURE AT 1 PPM FOR 5 DAYS RESULTED IN "NO RECOGNIZABLE INJURY AMONG THE ANIMALS".

/RABBITS, GUINEA PIGS, RATS, & MICE WERE EXPOSED TO 1 PPM FOR 5 DAYS/ ... WITHOUT EFFECT ... WHEREAS SERIOUS EFFECTS WERE SEEN AFTER A SINGLE EXPOSURE OF /1 PPM FOR 4 HR/ ... TOLERANCE DEVELOPMENT AGAINST THE ACUTE EFFECTS WOULD SEEM A REASONABLE INTERPRETATION.

TELLURIUM HEXAFLUORIDE CAUSES RESPIRATORY IRRITATION. IN PERSONS WITH IMPAIRED PULMONARY FUNCTION, ESPECIALLY THOSE WITH OBSTRUCTIVE AIRWAY DISEASES, THE BREATHING OF TELLURIUM HEXAFLUORIDE MIGHT CAUSE EXACERBATION OF SYMPTOMS DUE TO ITS IRRITANT PROPERTIES.

Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poison A and B/

Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in respiratory arrest. Positive pressure ventilation techniques with a bag valve mask device may be beneficial. Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV with D5W /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. Consider drug therapy for pulmonary edema ... . For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poison A and B/

Releases of CERCLA hazardous substances are subject to the release reporting requirement of CERCLA section 103, codified at 40 CFR part 302, in addition to the requirements of 40 CFR part 355. Tellurium hexafluoride is an extremely hazardous substance (EHS) subject to reporting requirements when stored in amounts in excess of its threshold planning quantity (TPQ) of 100 lbs.

Tellurium hexafluoride

0.83

15

Weapons of Mass Effect chemical material that, if stolen or diverted, can be converted into weapons using simple chemistry, equipment, or techniques.

... Two postgraduate chemists ... accidentally inhaled tellurium hexafluoride gas when 50 g leaked from a cylinder in their laboratory. ... They were hospitalized for 2 and 3 days, respectively. Apart from the pungent odor of their breaths, their only symptoms were tiredness and a tendency to fall asleep in the late afternoon. One of them showed a unique bluish black pigmentation below the skin surface on the webs of his fingers and to a lesser degree in streaks on his face and neck. These intradermal deposits of tellurium took several weeks to fade. Photographs of this case show very clearly a rare form of true skin absorption, in this instance probably of the volatile tellurium esters.

A byproduct of ore refining; [ACGIH]

Metal Extraction and Refining [Category: Industry]

Tellurium hexafluoride is a by-product of ore refining.