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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

Product Name: 4-Chloro-3,5-Dimethylphenol (PCMX) 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

Product name : Lanthanum Oxide Formula : La2O3 CAS No. : 1312-81-8 Purity : 99.9-99.999% Color : White Powder Feature * 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.