Polymeric Aldehyde PFA Industry Chemicals is a white, solid polymer of Formaldehyde with the pungent, characteristic formaldehyde odor. High Purity Chemicals Paraformaldehyde is made up of connected formaldehyde molecules. High-Grade Chemicals Paraformaldehyde is slightly soluble in alcohols and insoluble in ethers, hydrocarbons, and carbon tetrachloride. It is relative insoluble in cold water, but soluble in hot water with depolymerization. High-End Chemicals
The solubility and rate of solution of paraformaldehyde in water are greatly influenced by pH and temperature. Both acidic and alkaline pHs and higher temperatures accelerate the rate of solution. Once dissolved, the paraform solution behaves like the methanol-free Formaldehyde Solution of the same concentration. Paraformaldehyde is composed of varying molecular weight polymers of polyoxymethylene glycols. It is generally prepared as 91 or 95% formaldehyde by weight with the remainder being free and combined water. The combined water is the terminating agent for the paraformaldehyde chains. Paraformaldehyde reacts chemically as formaldehyde at a rate determined by its rate of depolymerization under the conditions of use. The rate of depolymerization and thus perceived reactivity decreases with increasing molecular weight of the polymer chains.
Paraformaldehyde CAS 30525-89-4 is not a fixative; it must be depolymerized to formaldehyde in solution. In cell culture, a typical formaldehyde fixing procedure would involve using a 4% formaldehyde solution in phosphate buffered sline (PBS) on ice for 10 minutes.
Paraformaldehyde PFA by Xinlongwei
Molecular formula: (CH2O)n
Molecular weight: 600
CAS No.: 30525-89-4
Resins, Agrochemicals, Medical Applications, Others (Including Development of Photographic Films, Papermaking, Oil Field Chemicals, lubricant additives, etc.)
25KG woven bag, 20MT/20`FCL on pallets.
5. Storage and Handling
Keep away from heat and flame. Keep from contact with oxidizing materials.
Store in a cool, dry, well ventilated area.
Looking for ideal Paraform White Powder Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the PFA 96% Specification are quality guaranteed. We are China Origin Factory of Best Price Para-formaldehyde. If you have any question, please feel free to contact us.
Product Categories : Formaldehyde