Tungsten hexafluoride

Toxic Gases & Vapors -> Corrosive Gases

Corrosives

3.44 g/cu cm

13.069 @25 °C

Yellow liquid or colorless gas

Orthorhombic, deliquescent crystals when solid

Reacts with water

Decomposes in water

Very soluble in carbon tetrachloride, cyclohexane

Solubility in anhydrous hexafluoride: 3.14 moles/1000 g HF

MIscible with many colvents (e.g. cyclohexane, carbon tetrachloride)

67 °F

17.1 °C

17.5 °C @760 [mm Hg]

37 °F

1.9 °C

2.3 °C

Tungsten hexafluoride appears as a toxic corrosive light yellow liquid or gas. Noncombustible. Used in the manufacture of other chemicals and in the manufacture of electronics.

CBI; Gas Vapor; Liquid

Colorless gas or light-yellow liquid that decomposes in water; [Hawley]

Critical volume: 233 cu cm/mol

Specific gavity: 3.551 at 15 °C/liquid

Hexane solutions often strongly colored

Danger

H280 (100%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]

P260, P262, P264, P264+P265, P270, P271, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P320, P321, P330, P361+P364, P363, P403+P233, P405, P410+P403, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 142 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Danger

H280: Contains gas under pressure; may explode if heated [Warning Gases under pressure]

Tungsten fluoride (WF6), (OC-6-11)- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Tungsten fluoride (WF6), (OC-6-11)- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

REACH registered substance: Tungsten hexafluoride (EC: 232-029-1)

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

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

· Some may burn but none ignite readily.

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

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

Section 8(a) of TSCA requires manufacturers of this chemical substance to report preliminary assessment information concerned with production, exposure, and use to EPA as cited in the preamble in 51 FR 41329. Effective date: 1/6/2005; Reporting date: 3/7/2005.

Tungsten hexafluoride

UN2196

Div 2.3 Poisonous gas (49 eCFR § 173.115)

Div 2.3 Poisonous gas (49 eCFR § 173.115)

· 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.

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

General First Aid:

· 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)]

If material involved in fire: Use dry chemical, dry sand, or carbon dioxide. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

Environmental considerations: Land spill: Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents.

Environmental considerations: Water spill: Use natural deep water pockets excavated lagoons, or sand bag barriers to trap material at bottom. Remove trapped material with suction hoses.

Environmental considerations: Air spill: Vapor knockdown water is corrosive or toxic and should be diked for containment.

If material not involved in fire: Neutralize spilled material with crushed limestone, soda ash, or lime.

According to the 2006 TSCA Inventory Update Reporting data, the number of persons reasonably likely to be exposed in the industrial manufacturing, processing, and use of tungsten hexafluoride is 1 to 99; the data may be greatly underestimated(1).

Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Fluorine and related compounds/

Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. 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 adn treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) 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 patent can swallow, has a strong gag reflex, and does not drool. ... . Cover skin burns with dry sterile dressings after decontamination ... . /Fluorine and related compounds/

Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors if patient is hypotensive with a normal fluid volume. Watch for signs of fluid overload ... . Treat seizures with diazepam or lorazepam ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Fluorine and related compounds/

Section 8(a) of TSCA requires manufacturers of this chemical substance to report preliminary assessment information concerned with production, exposure, and use to EPA as cited in the preamble in 51 FR 41329. Effective date: 1/6/2005; Reporting date: 3/7/2005.

Tungsten hexafluoride

7.1

45

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

Used in the application of tungsten coatings; Used in chemical synthesis; [NJ-HSFS]

Its major use is in chemical vapor deposition (CVD), which produces tungsten coatings on both conducting and insulating substrates.

In the electronics industry as a source of tungsten metal that connects the aluminum layers within semiconductor devices.

Fluorinating agent

2023: 1,000,000 - <5,000,000 lb

Production volume for non-confidential chemicals reported under the 2006 Inventory Update Rule. Chemical: Tungsten fluoride. Aggregated National Production Volume: 500,000 to < 1 million lbs.

Manufactured by the direct action of elemental fluorine on solid powdered tungsten, e.g., in a flame reactor.

Prepared by direct fluorination of powdered tungsten. Can be purified by distillation, preferably under pressure.

Computer and Electronic Product Manufacturing

Tungsten fluoride (WF6), (OC-6-11)-: ACTIVE