The meteorite in question has been estimated to be approximately 10 km in diameter, and the nickel fallout would have been somewhere between 130 and 1300 ppm (parts per million). Exposure to these fumes should be regulated, and anybody in that Environment is strongly advised to wear a facemask to limit exposure. With nickel allergy, there are typical allergic reactions like swelling, hives, difficulty breathing, etc. Dietary standards for trace nickel in human consumption are not established. Exposure to nickel sulfate or nickel subsulfide also produced damage to the nasal olfactory epithelium. Exposure to Nickel Nickel is a silvery-white metal with a slight golden tinge that takes a high polish. About 10% of women and 2% of men are highly sensitive to nickel. Nickel sulfate was the most toxic of the three compounds and nickel oxide was the least toxic. Overview Information Nickel is a mineral. It is found in several foods including nuts, dried beans and peas, soybeans, grains, and chocolate.The body needs nickel, but in very small amounts. ysmina January 15, 2013 . I thought that nickel poisoning and nickel allergy is the same but apparently it's not. Heavy metal poisoning can cause many different conditions such as cancer, hormonal imbalances, neurological disturbances, depression, food allergies and much more. Nickel is a common metal that can cause many of these problems. The level usually found in soil samples is 15 ppm; at 40 ppm, the nickel concentration is considered toxic. It is one of only four elements that are magnetic at or near room temperature, the others being iron, cobalt and gadolinium.Its Curie temperature is 355 °C (671 °F), meaning that bulk nickel is non-magnetic above this temperature. Nickel is a silver-colored metal found naturally in the environment. Cocoa Powder Animal studies suggest that nickel may play a role in the body’s use of folic acid and vitamin B12, which are both necessary to help maintain desirable levels of homocysteine, a toxic amino acid that is associated with an increased risk of heart disease and stroke. @ankara-- It's not that difficult to know because these symptoms will be triggered by nickel exposure. Compared to chromium, nickel leaching is a much more serious issue since it’s right up there in the Substance Priority List (SPL) of the Agency for Toxic Substances and Disease Registry (ATSDR). Nickel Leaching. For all three compounds, the threshold for lung effects decreased as the duration of exposure increased. Nickel chloride is used in electroplating, in nickel catalysts and to absorb ammonia in industrial gas masks. Exposure to this substance can cause severe dermatitis, skin and asthma-like allergies and affects the lungs, kidneys, gastrointestinal tract and neurological system. Certain amounts of nickel are useful to the human body, but too much nickel can be toxic. Exposure to nickel can be found where metal compounds and alloys are welded, cut, and plated, causing the air to become extremely hot, and setting-off metal carcinogenic fumes, such as nickel. General Nickel Toxicity Information Nickel is a silver-white metal found in the earth’s crust that is used to produce steel, nickel-cadmium batteries, heating fuel, nickel plating and ceramics. Nickel Chloride is a green or yellow colored, crystalline inorganic compound that produces toxic gases upon heating. 2. However, there’s sad news for people allergic to nickel – chocolate is full of it. Toxicity. nickel subsulfide, or nickel oxide. According to the Agency of Toxic Substances and Disease Registry, dark chocolate contains a concentration of 2.6 µg/g of nickel, while milk chocolate has 1.2 µg/g. It’s often mixed with other metals and used to make various everyday items. 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