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A saturated water solution, of about 40% formaldehyde by volume or 37% by mass, is called "100% formalin". A small amount of stabilizer, such as methanol, is usually added to suppress oxidation and polymerization. A typical commercial-grade formalin may contain 10–12% methanol in addition to various metallic impurities.
The methylene blue sulfide test is a convenient method often used in soil microbiology to quickly detect in water the metabolic activity of sulfate reducing bacteria (SRB). It must be noted that in this colorimetric test, methylene blue is a product formed by the reaction and not a reagent added to the system.
Bleach. Bleach is the generic name for any chemical product that is used industrially or domestically to remove colour (whitening) from fabric or fiber (in a process called bleaching) or to disinfect after cleaning. It often refers specifically to a dilute solution of sodium hypochlorite, also called "liquid bleach".
Paraquat is an oxidant that interferes with electron transfer, a process that is common to all life. Addition of one electron gives the radical cation: [paraquat]2++ e−↽−⇀{\displaystyle {\ce {<=>>}}}[paraquat]•+. The radical cation is also susceptible to further reduction to the neutral [paraquat]0:[26]
Unpasteurized juices. Prepared salads (especially with creamy dressings) Raw sprouts. Unwashed fruits and vegetables. While some measures can help make some of these items safer — such as ...
Sea salt is one of the most common causes of sodium poisoning. Salt poisoning is an intoxication resulting from the excessive intake of sodium (usually as sodium chloride) in either solid form or in solution ( saline water, including brine, brackish water, or seawater ). Salt poisoning sufficient to produce severe symptoms is rare, and lethal ...
The trumpet shell Charonia sauliae has been implicated in food poisonings, and evidence suggests it contains a tetrodotoxin derivative. There have been several reported poisonings from mislabelled pufferfish, and at least one report of a fatal episode in Oregon when an individual swallowed a rough-skinned newt Taricha granulosa on a dare. [61]
Food poisoning is one of the last things most of us want to plan for when preparing for a trip. Even the thought of an upset stomach while on the road is uncomfortable. In any case, the ...