How to use Formaldehyde in a sentence
The metal can be reduced by magnesium, zinc, cadmium, iron, tin, copper and substances like hypophosphorous acid from acid solutions or from alkaline ones by formaldehyde.
It was further commented that the DETR paper indicated that other simple aldehydes were generally present at lower concentrations than formaldehyde and acetaldehyde.
Plywood, for example, can contain formaldehyde - a " probable carcinogen ", according to the International Agency for Research on Cancer.
This Formaldehyde free formula penetrates thick, dry cuticles leaving them soft and transparent.
Liquid dish soap is the leading cause of poisoning among children under six years old as many commercial dish soaps contain formaldehyde and ammonia.Advertisement
Carpets hide dust mites which contribute to asthma, plus the glue and underlay can release formaldehyde into the air.
If the wrong fluid is used it is possible that unpleasant and toxic fumes including formaldehyde could be produced.
For our main hospital based units we rarely use formaldehyde.
Following decontamination, the microbiological safety cabinet must be purged of all residual formaldehyde.
Waste timber can contribute to gas generation in landfill and wood treated with preservatives (e.g. formaldehyde) has the potential to produce leachate.Advertisement
In the UK, board manufacturers are advertising low formaldehyde or zero formaldehyde emission boards made to the stringent German " E1 " standard.
Swinburne became interested in plastics in 1902 when he was introduced to the phenol formaldehyde reaction.
Thus 4% buffered formaldehyde is equivalent to 10% buffered formalin.
There is a significant exposure to formaldehyde in the construction industry from paints, hardboard, rockwool, plastics and waterproof glues.
Investigations in phenol formaldehyde resins for example elucidate mechanism and provide new flame retardant materials.Advertisement
Formaldehyde proved safer and less troublesome than corrosive sublimate, chlorine gas or sulfur dioxide.
In the manufacturing process, it is often treated with chlorine bleach, formaldehyde and other finishing agents that are considered toxic.
The same applies for thermal insulation materials which use urea and formaldehyde.
The fabric is formaldehyde free, 100% cotton bonded either side of a 100% polyurethane waterproof layer.
Formaldehyde vapor was undetectable using solution M for the RO cleaning procedure.Advertisement
They are then covered in fabrics like polyester, vinyl, or nylon and treated with chemicals, including formaldehyde.
Other bad air toxic materials used during building include mold, vermiculite attic insulation, formaldehyde, glues, paints, wood strippers, waxes and more.
Common culprits include poison ivy, poison oak, and poison sumac; fragrances and preservatives in cosmetics and personal care products, such latex items as gloves and condoms; and formaldehyde.
Have fun styling black teen hair, but avoid chemicals like formaldehyde that can do more harm than good.
Brazilian Blowout solution has been shown in some studies to contain formaldehyde, which is a human carcinogen and commonly an allergen.Advertisement
Other tests by Health Canada found the solutions to contain 8.4 to 12 percent formaldehyde.
Bakelite is a compound formed from carbolic acid and formaldehyde; yet this compound has many favorable properties that helped to make it a long lasting and useful material in everything from car parts to fashion pieces.
However, findings suggest that these reactions often occur with inks containing toxic ingredients such as cinnabar in red pigments, or dispersing solutions composed of formaldehyde or denatured alcohols.
At one time people were using formaldehyde to harvest maple syrup.
A couple of these ingredients, such as formaldehyde and toluene, are a cause of concern.Advertisement
Formaldehyde is a known carcinogen, but it's usually present in such small doses that the amount in nail polish is infinitesimal.
For a nail polish to be considered natural, it should be free of formaldehyde, toluene, xylene and artificial colors.
Unlike Brisa, other UV gel systems contain formaldehyde and acrylates, ingredients that can cause skin sensitivity issues.
The formation of formaldehyde has till recently not been satisfactorily proved, though it has been obtained from certain leaves by distillation.
Recent investigations have confirmed Baeyers view of the formation of formaldehyde, but a different explanation has been recently advanced.Advertisement
The first chemical change suggested is an interaction between carbon dioxide and water, under the influence of light acting through chlorophyll, which leads to the simultaneous formation of formaldehyde and hydrogen peroxide.
The formaldehyde at once undergoes a process of condensation oi- polymerization by the protoplasm of the plastid, while the hydrogen peroxide is said to be decomposed into water and free oxygen by another agency in the cell, of the nature of one of the enzymes of which we shall speak later.
The steps which lead from the appearance of formaldehyde to that of the first well-defined carbohydrate are again matters of speculation.
Its tetramethyl-diamino derivative, which is formed by condensing formaldehyde with dimethyl-meta-aminophenol and subsequent elimination of water from the resulting diphenyl methane derivative, is the leuco base of pyronine, into which it passes by oxidation.
It behaves as a powerful reducing agent, and on hydrolysis with dilute mineral acids is decomposed into formaldehyde and hydroxylamine, together with some formic acid and ammonia, the amount of each product formed varying with temperature, time of reaction, amount of water present, &c. This latter reaction is probably due to some of the oxime existing in the form of the isomeric formamide HCO NH 2.Advertisement
It appears to be synthesized in the plant tissues from carbon dioxide and water, formaldehyde being an intermediate product; or it may be a hydrolytic product of a glucoside or of a polysaccharose, such as cane sugar, starch, cellulose, &c. In the plant it is freely converted into more complex sugars, poly-saccharoses and also proteids.
The lower members of the series are neutral liquids possessing a characteristic smell; they are soluble in water and are readily volatile (formaldehyde, however, is a gas at ordinary temperatures).
In 1861 Butlerow obtained a sugar-like substance, methylenitan, by digesting trioxymethylene, the solid polymer of formaldehyde, with lime.
Oxidation gives formaldehyde, formic acid and carbonic acid; chlorine and bromine react, but less readily than with ethyl alcohol.
It condenses readily with aldehydes, yielding with formaldehyde, on the addition of.Advertisement
It was formerly thought that its action was due to the setting free of formaldehyde in the urine, but it is now known by the researches of P. Cammidge that this is not so.