Paraformaldehyde is a polymer of formaldehyde with the chemical formula (CH2O)n, where n is typically in the range of 8 to 100. It is a white, crystalline solid composed of small, polymeric formaldehyde units. Paraformaldehyde is commonly used as a solid form of formaldehyde, and it has various applications in different fields.
Form and Structure:
Paraformaldehyde is a low-molecular-weight polymer of formaldehyde, consisting of repeating CH2O units.
It is often produced in the form of white, crystalline granules or as a powder.
Uses:
Fixative in Histology: Paraformaldehyde is commonly used in histology and pathology laboratories as a fixative for preserving biological specimens for microscopic analysis.
Disinfectant: It has disinfectant properties and can be used for sterilizing equipment.
Crosslinking Agent: Paraformaldehyde is used in the crosslinking of proteins, peptides, and nucleic acids in molecular biology applications.
Chemical Synthesis: It serves as a source of formaldehyde in various chemical reactions and syntheses.
Handling and Safety:
Paraformaldehyde should be handled with care, and precautions should be taken to avoid inhalation, skin contact, or ingestion.
When paraformaldehyde is heated, it releases formaldehyde gas, which is a strong irritant. Adequate ventilation and protective equipment should be used when working with paraformaldehyde.
Dissolution:
To use paraformaldehyde as a fixative or in other applications, it is typically dissolved in water to generate a formaldehyde solution.
Storage:
Paraformaldehyde should be stored in a cool, dry place away from heat sources and incompatible materials.
Product Name: 2 4-Dichloro-3,5-Dimethylphenol (DCMX)
"Type: Cosmetic raw materials
Origin: China
CAS No.: 133-53-9
AUCO No.: 453
Packing: 25kg drum"
Items Standard
Appearance Light yellow flake crystals or clusters of crystals
Odor Phenolic characteristic odor
Content,% 98.0
Moisture,% 0.5
Iron ion(ppm) 80
Burning residue,% 0.5
Clarity of solution The solution is clarified without microscopic particles
Type: Cosmetic raw materials
Origin: China
CAS No.: 88-04-0
AUCO No.: 459
Packing: 25kg drum
Items Standard
Appearance White or near-white crystals
Odor Phenolic characteristic odor
Content,% 98.5
Melting point 114-116
Moisture,% 0.5
Iron ion(ppm) 80
Burning residue,% 0.1
3, 5-dimethylphenol,% 0.5
2-chloro-3, 5-dimethylphenol,% 0.3
Clarity of solution The solution is clarified without microscopic particles
* Soluble in acid and ammonium chloride, insoluble in water and ketone.
Application
* It is mainly used to manufacture special alloy precision optical glass, high refractive optical fiber board, suitable for making
cameras, microscope lenses and advanced optical instrument prisms, etc. *
* It is also used to manufacture ceramic capacitors,
piezoelectric ceramic dopants and X-ray luminescent materials such as lanthanum bromide oxide powder. It is used as a catalyst for
various reactions. Lanthanum oxide impregnated with lithium oxide or zirconium oxide (1%) can be used to manufacture ferrite
magnets, fiber optical devices and optical glass.
