Overview
4% Formaldehyde Aqueous Solution, often referred to as formalin, is a diluted solution of formaldehyde in water. It is widely used in medical, laboratory, and industrial settings due to its disinfectant and preservative properties. The solution typically contains 4% formaldehyde by weight, with methanol added as a stabilizer to prevent polymerization. Formalin is a critical reagent in histology for tissue fixation, ensuring cellular structures are preserved for microscopic examination. Its antimicrobial properties also make it valuable for disinfection and sterilization purposes. Despite its utility, handling requires strict safety measures due to its toxicity and irritant effects.
Physical and Chemical Properties
4% Formaldehyde Aqueous Solution is a clear, colorless liquid with a sharp, pungent odor. It has a density of approximately 1.08 g/cm³ and is miscible with water and alcohol. The solution is highly reactive, particularly in the presence of oxidizing agents, and can polymerize under certain conditions. The chemical stability of formalin depends on storage conditions. Exposure to heat or light can degrade the solution, reducing its effectiveness. The addition of methanol (typically 10-15%) helps stabilize the formaldehyde, preventing the formation of paraformaldehyde, a white precipitate that can clog containers and equipment.
Main Applications
The primary use of 4% Formaldehyde Aqueous Solution is in histology and pathology labs, where it serves as a fixative for tissue samples. It cross-links proteins and nucleic acids, preserving cellular morphology for accurate diagnosis and research. In the medical field, it is also employed for disinfecting surfaces and medical instruments. Industrially, formalin is used in the production of resins, adhesives, and coatings. It acts as a biocide in water treatment and as a preservative in cosmetics and personal care products. Its versatility makes it indispensable in sectors requiring antimicrobial and preservative solutions.
Safety and Storage
4% Formaldehyde Aqueous Solution poses significant health risks, including respiratory irritation, skin burns, and potential carcinogenicity with prolonged exposure. Proper personal protective equipment (PPE), such as gloves, goggles, and respirators, is essential when handling the solution. Work areas should be well-ventilated to minimize inhalation risks. Storage requires airtight containers made of materials resistant to formaldehyde, such as polyethylene or glass. The solution should be kept in a cool, dark place to prevent degradation. Spills must be neutralized with ammonium hydroxide or sodium bisulfite and cleaned up immediately to avoid environmental contamination.
B2B Procurement Guide
When procuring 4% Formaldehyde Aqueous Solution, verify the concentration and purity to ensure it meets application requirements. Reputable suppliers should provide certificates of analysis (CoA) and material safety data sheets (MSDS). Bulk purchases may offer cost savings, but consider storage capacity and shelf life. Regulatory compliance is critical, particularly for medical and laboratory use. Ensure the supplier adheres to relevant standards, such as ISO or USP. For industrial applications, evaluate the solution’s compatibility with other chemicals in the production process. Always prioritize suppliers with a track record of reliability and safety.
Related Manufacturers
- 主营：透析袋、移液器、SIGMA、甲醛水溶液、赛默飞、爱思进、康宁、离心管、巴氏吸管、保存管、封板膜、细胞爬片、滤器、ELISA试剂盒
- 主营：透析袋、移液器、SIGMA、甲醛水溶液、赛默飞、爱思进、吸头/枪头、离心管、巴氏吸管、保存管、封板膜、细胞爬片、滤器、ELISA试剂盒
- 主营：硫酸钡、碳酸钙、硅溶胶、多聚甲醛、苄基胂酸、甲基磺酸、氨基磺酸、正硅酸乙酯
- 主营：脱漆剂、壬二酸、辛二酸、422、戊二酸、交联剂、己二醇、戊二醇、异己烷、清洗剂、氯代叔丁烷、正癸烷
- 主营：四氢噻吩、二甲基亚砜、二甲基二硫醚、水杨酸、苯甲醛、水合肼、乙酰氯、氢氟酸、二甲苯、甲酰胺、丙烯腈、正丙醇、甲酸钠、正丙醛、丙二腈、二甲基硫醚、硬脂酸、石油醚、氯乙酸、乙二醛、乙二醇、异戊烷、苯乙烯、仲丁胺、叔丁醇
- 主营：乙硫醇、环丁砜、四氢吡咯、三聚甲醛、四氢噻吩、四氢呋喃、3-羟基丙腈、二甲基亚砜、二甲基二硫醚、氯乙酸、氯乙酸钠、偏铝酸钠、异辛烷、偏三甲苯、硬脂酸锌、苯酚、邻苯二甲酸二丁酯、MIBC、苯酐、顺酐
- 主营：石油醚、四氢噻吩、顺酐、苯酐
- 主营：聚乙二醇、聚丙二醇、叔胺、伯胺、染料中间体
- 主营：四氢噻吩、乙硫醇、单氰胺、二甲基二硫醚、3-甲硫基丙醛、四氢吡咯、邻氯苯腈、噻吩、盐酸羟胺、硬脂酸锌、异丙胺、氯乙酸、氟硼酸
- 主营：氯化亚铁、对甲苯磺酸、十溴二苯乙烷、K54促进剂、酚醛树脂2402、硼酸锌、促进剂DMP-30、叔丁基过氧化氢TBH、木材防腐剂ACQ、癸二酸二辛酯DOS、磷酸三乙酯TEP、硫酸锆、有机锡T12、三羟甲基丙烷、N-甲基吡咯烷酮、雕白粉、衣康酸、氢氧化铝、溴酸钠、吊白块
- 主营：十六烷基三甲基溴化铵、十二烷基甜菜咸、乳化剂、对氟苯甲醛、亚磷酸三丁酯、棕榈油、钛酸四丁酯、钛酸四乙酯
- 主营：异丙醇、冰醋酸、化工原料、无水乙醇、正庚烷、甲基环己烷、乙二醇、苯酚、江苏异丙醇、江苏化工原料、工业吡啶、工业苯酚、正丁醇、MIBK、正己烷
- 主营：聚乙烯亚胺、三甘醇二异辛酸酯3G8、TS-1钛硅分子筛、三硫代碳酸钠40%、六氯环三磷腈、5-甲基靛红、烷基苯磺酸酯、苯基次磷酸钠、甲巯咪唑、吡啶硫酮锌、焦磷酸哌嗪、热敏材料、油酸甲酯、曲酸
- 主营：抗氧剂BHT、苯磺酸、苯酚磺酸、环烷酸铈、N235 萃取剂、C272萃取剂、均苯四甲酸二酐、对苯乙烯磺酸钠、氟化铝、椰油酰胺丙基甜菜碱、甘油三苯甲酸酯
- 主营：正己烷、苯乙烯、异丙醇、溶剂油、叔丁醇、正庚烷、醋酸丁酯、环氧树脂、二氯甲烷、乙酸乙酯、醋酸甲酯、n-甲基甲胺、多乙烯多胺、丙烯酸甲酯、金属清洗剂、甲基丙烯酸、二乙氨基乙醇
- 主营：有机原料、中间体、香精香料、催化剂、有机硅、表面活性剂
- 主营：甘氨酸、阻燃剂、硫酸锌、水苏糖、硫酸锆、硫酸锂、硫酸锶、硫酸锰、铝酸锌、1680-21-3、牛磺酸、褪黑素、磷酸铁、丙酸铵、苏云金、碳酸镁、麝香酮、肉桂醛、磷酸铝、王浆酸、椰油胺、赖氨酸、增塑剂、浸膏粉、乙氧基