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| Quantity: | |
|---|---|
Formaldehyde
XLW
Sodium formaldehyde bisulphite cas no 870-72-4
| CAS No. | 870-72-4 |
| Molecular weight | CH3NaO4S |
| EINECS | 212-800-9 |
| Spec: | two specs: 94% white powder type, and low purity liquid type |
Formaldehyde (systematic name methanal) is a naturally occurring organic compound with the formula CH2O (H−CHO). It is the simplest of the aldehydes (R−CHO).
Formaldehyde is more complicated than many simple carbon compounds in that it adopts several different forms. As a gas, formaldehyde is colorless and has a characteristic pungent, irritating odor. Upon condensation, the gas converts to various other forms of formaldehyde (with different chemical formulas) that are of more practical value. One derivative is the cyclic trimer metaformaldehyde (1,3,5-trioxane) with the formula (CH2O)3. There is also a linear polymer called paraformaldehyde. These compounds have similar chemical properties and are often used interchangeably.
When dissolved in water, formaldehyde also forms a hydrate, methanediol, with the formula H2C(OH)2. This compound also exists in equilibrium with various oligomers (short polymers), depending on the concentration and temperature. 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. "Formaldehyde" was first used as a generic trademark in 1893 following a previous trade name, "formalin".
Protect packages from damage and keep cargo well closed, and keep from fire.Store in a warm,well ventilated,dry and shaded area. Avoid inhalation, ingestion and contact with eyes and skin.
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