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Highly Toxic: a gas that has a LC 50 in air of 200 ppm or less. [2] NFPA 704: Materials that, under emergency conditions, can cause serious or permanent injury are given a Health Hazard rating of 3. Their acute inhalation toxicity corresponds to those vapors or gases having LC 50 values greater than 1,000 ppm but less than or equal to 3,000 ppm ...
Early refrigerators could only be opened from the outside, making accidental entrapment a possibility, particularly of children playing with discarded appliances; many such deaths have been recorded. [ 1 ] [ 2 ] Modern designs have a magnetic closure that can be opened by pushing from the inside.
Whether to practice safe food storage or to adopt a healthier lifestyle, we'll show you nine hidden hazards in your refrigerator that you should throw out immediately.
The device is a blood glucose monitor targeted at children with diabetes that provides users with incentives to monitor their blood glucose levels through the use of games and points. Advertised as the "first medical device to interface with a Nintendo Game Boy", [ 1 ] the Glucoboy received retrospective attention for its innovative and unusual ...
Gas stoves also affect children. A 2023 study also linked gas stoves with nearly 13% of childhood asthma cases, while a meta-analysis of 41 scientific papers found that owning a gas stove could ...
The first air conditioners and refrigerators employed toxic or flammable gases, such as ammonia, sulfur dioxide, methyl chloride, or propane, that could result in fatal accidents when they leaked. [4] In 1928 Thomas Midgley Jr. created the first non-flammable, non-toxic chlorofluorocarbon gas, Freon (R-12).
Thomas Midgley Jr. (May 18, 1889 – November 2, 1944) was an American mechanical and chemical engineer.He played a major role in developing leaded gasoline (tetraethyl lead) and some of the first chlorofluorocarbons (CFCs), better known in the United States by the brand name Freon; both products were later banned from common use due to their harmful impact on human health and the environment.
Kettering patented a refrigerating apparatus to use the gas; this was issued to Frigidaire, a wholly owned subsidiary of General Motors. [5] In 1930, General Motors and DuPont formed Kinetic Chemicals to produce Freon. Their product was dichlorodifluoromethane and is now designated "Freon-12", "R-12", or "CFC-12".