Section 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION

PRODUCT NAME

URANIUM HEXAFLUORIDE

NFPA

PRODUCT USE

The use of a quantity of material in an unventilated or confined space may result in
increased exposure and an irritating atmosphere developing.Before starting consider
control of exposure by mechanical ventilation. This radioactive material may be supplied
in a variety of package types and may exhibit a range of specific activities. This
document is intended to describe one such material thought to be representative of a
typical commercial product. Gaseous diffusion process for separating isotopes of uranium.

SYNONYMS

F6-U, UF6, "uranium fluoride", "uranium (VI) fluoride", "uranium (VI) fluoride"

Section 2 - HAZARDS IDENTIFICATION

CANADIAN WHMIS SYMBOLS

EMERGENCY OVERVIEW

RISK

Contact with water liberates toxic gas.
Danger of cumulative effects.
Causes burns.
Risk of serious damage to eyes.
Limited evidence of a carcinogenic effect.
Very toxic by inhalation and if swallowed.
Toxic to aquatic organisms, may cause long- term adverse effects in the aquatic
environment.

POTENTIAL HEALTH EFFECTS

ACUTE HEALTH EFFECTS

SWALLOWED

  The material can produce chemical burns within the oral cavity and gastrointestinal tract following ingestion.  Severely toxic effects may result from the accidental ingestion of the material; animal experiments indicate that ingestion of less than 5 gram may be fatal or may produce serious damage to the health of the individual.  The material can produce severe chemical burns within the oral cavity and gastrointestinal tract following ingestion.  The kidney and liver can be damaged by uranium, causing excessive acid and urea in the blood and generalized ill health.  Uranium compounds are not highly poisonous in low concentrations but may be lethal in high concentrations.  Fluoride causes severe loss of calcium in the blood, with symptoms appearing several hours later including painful and rigid muscle contractions of the limbs. Cardiovascular collapse can occur and may cause death with increased heart rate and other heart rhythm irregularities. The brain and kidneys may be affected. Other toxic effects include headache, increased saliva output, jerking of the eyeball and dilated pupils, lethargy, stupor, coma and rarely, convulsions.  

EYE

  The material can produce chemical burns to the eye following direct contact. Vapors or mists may be extremely irritating.  The material can produce severe chemical burns to the eye following direct contact. Vapors or mists may be extremely irritating.  If applied to the eyes, this material causes severe eye damage.  The eye is particularly sensitive to radioactivity. A single dose of 1 Gy can cause inflammation of the conjunctiva and cornea. It is unlikely that a dose sufficient to cause radiation sickness would occur if only the eyes were involved. However, if eye damage caused by ionizing radiation occurs, it should be assumed that other parts of the body are involved.  

SKIN

  The material can produce chemical burns following direct contactwith the skin.  The material can produce severe chemical burns following direct contactwith the skin.  Skin contact with the material may damage the health of the individual; systemic effects may result following absorption.  Fluorides are easily absorbed through the skin and cause death of soft tissue and erode bone. Healing is delayed and death of tissue may continue to spread beneath skin.  Open cuts, abraded or irritated skin should not be exposed to this material.  Entry into the blood-stream, through, for example, cuts, abrasions or lesions, may produce systemic injury with harmful effects. Examine the skin prior to the use of the material and ensure that any external damage is suitably protected.  A whole body dose of 2-10 Gray may cause loss of appetite, tiredness, nausea and vomiting,  most severe after 6-12 hours. After this subsides a gross disturbance in blood cell distribution occurs with loss of white blood cells and platelets over weeks. The activity of bone marrow may become so depressed that overwhelming infections can occur and cause death. A dose of 4 Gray can lead to damage of the bowel lining, causing untreatable nausea, vomiting and diarrhea, which may result in severe dehydration, collapse and death. Although repair of the damage may occur, failure of blood cell production can ensue. At 6 Gray, damage to the blood cell production and digestive systems can be fatal. Whole body doses of 30 Gray can cause nausea, vomiting, listlessness, drowsiness, weakness, tremors, convulsions, inco-ordination and death within hours. The reproductive organs are particularly sensitive to radiation. A does of 0.3 Gray can cause temporary loss of fertility in men; there may be cessation of periods in women.  All soluble uranium compounds are lethal when applied at sufficiently high concentrations in a single dose to the skin of rabbits; insoluble salts do not cause death and cause no signs of poisoning.  

INHALED

  Inhalation of dusts, generated by the material, during the course of normal handling, may produce severely toxic effects; these may be fatal.  The material can cause respiratory irritation in some persons. The body's response to such irritation can cause further lung damage.  A whole body dose of 2-10 Gray may cause loss of appetite, tiredness, nausea and vomiting,  most severe after 6-12 hours. After this subsides a gross disturbance in blood cell distribution occurs with loss of white blood cells and platelets over weeks. The activity of bone marrow may become so depressed that overwhelming infections can occur and cause death. A dose of 4 Gray can lead to damage of the bowel lining, causing untreatable nausea, vomiting and diarrhea, which may result in severe dehydration, collapse and death. Although repair of the damage may occur, failure of blood cell production can ensue. At 6 Gray, damage to the blood cell production and digestive systems can be fatal. Whole body doses of 30 Gray can cause nausea, vomiting, listlessness, drowsiness, weakness, tremors, convulsions, inco-ordination and death within hours. The reproductive organs are particularly sensitive to radiation. A does of 0.3 Gray can cause temporary loss of fertility in men; there may be cessation of periods in women.  Material is highly volatile and may quickly form a concentrated atmosphere in confined or unventilated areas. Vapor is heavier than air and may displace and replace air in breathing zone, acting as a simple asphyxiant. This may happen with little warning of overexposure.  The use of a quantity of material in an unventilated or confined space may result in increased exposure and an irritating atmosphere developing.Before starting consider control of exposure by mechanical ventilation.  Dusts and mists containing uranium compounds are highly toxic and more so if inhaled rather than ingested. A single large dose can produce radiation sickness. Whole body doses of 2 to 10 Gray may cause loss of appetite, tiredness, nausea and vomiting. Soluble compounds are more dangerous and the effects on the body vary. Small particles may lodge in the lungs; larger ones tend to be swallowed. After a delay of up to several days, blood disturbances including loss of white blood cells and platelets may occur. Gastrointestinal symptoms can be severe with intense nausea, vomiting and diarrhea leading to dehydration and death. At doses up to 6 Gray survival is inversely proportional to dose. At 30 Gray, nausea, vomiting, listlessness and drowsiness, with tremors, weakness, convulsions, inco-ordination and death occurring within hours. Very small doses (0.3 Gray) can cause loss of male fertility; periods may stop in women.  

CHRONIC HEALTH EFFECTS

  There has been concern that this material can cause cancer or mutations, but there is not enough data to make an assessment.  Repeated or prolonged exposure to corrosives may result in the erosion of teeth, inflammatory and ulcerative changes in the mouth and necrosis (rarely) of the jaw. Bronchial irritation, with cough, and frequent attacks of bronchial pneumonia may ensue. Gastrointestinal disturbances may also occur. Chronic exposures may result in dermatitis and/or conjunctivitis.  Repeated or long-term occupational exposure is likely to produce cumulative health effects involving organs or biochemical systems.  Long-term exposure to respiratory irritants may result in disease of the airways involving difficult breathing and related systemic problems.  If absorbed in the body, uranium can be a hazard due to its radioactivity (alpha and gamma radiation). Uranium accumulates in the bones and can cause cancers there. It also increases the risk of developing cancers of the lung, central nervous system, and lymph. Uranium can cause kidney failure and damage the liver. It also causes skin inflammation, conjunctivitis and cataracts. Soluble compounds can be toxic if inhaled. Insoluble uranium compounds can accumulate in the lungs, causing scarring. Uranium can cause a wide range of genetic damage; if the reproductive cells are affected, there may be no signs until the damage is inherited to the next generation.  Limited evidence suggests that repeated or long-term occupational exposure may produce cumulative health effects involving organs or biochemical systems.  A single large or prolonged low exposure to radiation can cause delayed effects, including blood cancers, genetic disorders, shortened lifespan and cataracts. Leukemia is the most common cancer caused; cancers of the thyroid, bone, lung (due to radioactive particle deposits) and skin are also seen. Many and varied genetic changes can occur; if they affect cells of the reproductive system, they may only display themselves after being inherited.  Long term exposure to high dust concentrations may cause changes in lung function i.e. pneumoconiosis; caused by particles less than 0.5 micron penetrating and remaining in the lung. Prime symptom is breathlessness; lung shadows show on X-ray.  Extended exposure to inorganic fluorides causes fluorosis, which includes signs of joint pain and stiffness, tooth discoloration, nausea and vomiting, loss of appetite, diarrhea or constipation, weight loss, anemia, weakness and general unwellness. There may also be frequent urination and thirst. Redness, itchiness and allergy-like inflammation of the skin and mouth cavity can occur. The central nervous system may be involved.