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KENNAMETAL 434,CD3,CD4,CM3,CM4,PVA,P30,PVACM,P3M
| Flammability | 0 | |
| Toxicity | 2 | |
| Body Contact | 2 | |
| Reactivity | 0 | |
| Chronic | 2 | |
| SCALE: Min/Nil=0 Low=1 Moderate=2 High=3 Extreme=4 | ||
Hard metal carbide.
"Hard Metal", "Cemented WC", "Tungsten Carbide"
May cause SENSITIZATION by inhalation and skin contact.
Limited evidence of a carcinogenic effect.
Tantalum exerts no action on body tissues and fluids. When compounds of tantalum (tantalates) are administered by injection it appears to be deposited in the lungs, with degeneration of lung tissue. Tantalum can remain in the body for many years. In toxic doses soluble cobalt salts produce stomach pain and vomiting, flushing of the face and ears, rash, ringing in the ears, nervous deafness and reduced blood flow to the extremities. Toxicity of niobium is low if swallowed because it is poorly absorbed. However once it has gained access to the blood stream animal studies have shown the toxic effects are pronounced. Symptoms include urination, defecation, stretching of the lower region of the stomach as well as decreased respiration. Acute effects of poisoning may include bowel and urinary movements, milky discharge from the anus, slow breathing and lethargy. The kidneys may also be damaged. If given orally, tungsten can accumulate in the spleen, kidney and liver. Symptoms of poisoning include diarrhea, stoppage of breathing and circulatory collapse leading to death. Loss of appetite, abdominal pain, incoordination, trembling and shortness of breath can occur; weight loss is also common.
There is some evidence to suggest that this material can causeeye irritation and damage in some persons.
The material is not thought to produce adverse health effects or skin irritation following contact (as classified using animal models). Nevertheless, good hygiene practice requires that exposure be kept to a minimum and that suitable gloves be used in an occupational setting. 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.
Inhalation may produce health damage*. Persons with impaired respiratory function, airway diseases and conditions such as emphysema or chronic bronchitis, may incur further disability if excessive concentrations of particulate are inhaled. Effects on lungs are significantly enhanced in the presence of respirableparticles. Cobalt poisoning can cause inflammation of the terminal airways (bronchioles), and cause lethargy and death within hours. Tungsten is relatively inert and produces few respiratory effects.
There has been concern that this material can cause cancer or mutations, but there is not enough data to make an assessment. Inhaling this product is more likely to cause a sensitization reaction in some persons compared to the general population. Skin contact with the material is more likely to cause a sensitization reaction in some persons compared to the general population. Repeated exposures, in an occupational setting, to high levels of fine- divided dusts may produce a condition known as pneumoconiosis which is the lodgement of any inhaled dusts in the lung irrespective of the effect. This is particularly true when a significant number of particles less than 0.5 microns (1/50,000 inch), are present. Lung shadows are seen in the X-ray. Symptoms of pneumoconiosis may include a progressive dry cough, shortness of breath on exertion, increased chest expansion, weakness and weight loss. As the disease progresses the cough produces a stringy mucous, vital capacity decreases further and shortness of breath becomes more severe. Pneumoconiosis is the accumulation of dusts in the lungs and the tissue reaction in its presence. It is further classified as being of noncollagenous or collagenous types. Noncollagenous pneumoconiosis, the benign form, is identified by minimal stromal reaction, consists mainly of reticulin fibres, an intact alveolar architecture and is potentially reversible. Niobium can cause scarring of the lungs and damage the epithelium of thebronchi. Tantalum can cause some degree of lung scarring and chronic inflammationof the nose. Sensitization may give severe responses to very low levels of exposure, i.e. hypersensitivity. Sensitized persons should not be allowed to work in situations where exposure may occur.
免责声明：本MSDS仅供参考，使用者需根据实际情况评估风险并采取适当措施。
