Overview
Xylene standard is a high-purity grade of xylene used as a reference material in analytical chemistry and industrial applications. It typically consists of a mixture of three isomers (ortho-, meta-, and para-xylene) with precisely controlled composition. As a certified reference material (CRM), xylene standard is essential for instrument calibration, method validation, and quality assurance in laboratories. Manufacturers produce it under strict quality controls to ensure batch-to-b consistency and traceability to international measurement standards.
Physical and Chemical Properties
Xylene standard shares the fundamental properties of commercial xylene but with enhanced purity (typically 99.5% or higher). The liquid has a characteristic aromatic odor and exhibits moderate volatility at room temperature. Its chemical stability makes it suitable for long-term storage when properly contained. The standard demonstrates consistent chromatographic behavior, which is critical for its use in analytical applications. The precise ratio of isomers may vary depending on the specific standard formulation required for different testing protocols.
Main Applications
The primary use of xylene standard is in gas chromatography (GC) and high-performance liquid chromatography (HPLC) as a calibration reference and system suitability test material. It helps establish retention times and verify column performance. In environmental testing, xylene standards are crucial for analyzing air and water samples for xylene contamination. Industrial laboratories use them for quality control in petroleum refining, paint manufacturing, and chemical production processes where xylene is a component or byproduct.
Safety and Storage
Xylene standard requires careful handling due to its flammability and health hazards. Proper personal protective equipment (PPE) including gloves, goggles, and respiratory protection should be used when handling concentrated forms. Storage should be in approved flammable liquid cabinets away from heat sources and oxidizing agents. Containers must be tightly sealed to prevent evaporation and moisture absorption. The standard typically has a shelf life of 2-3 years when stored under recommended conditions, though users should verify stability for specific applications.
B2B Procurement Guide
When procuring xylene standard, buyers should specify the required purity level, isomer ratio, and certification requirements. Common certifications include ISO Guide 34, ISO/IEC 17025, or specific pharmacopeia standards for regulated industries. Reliable suppliers provide comprehensive certificates of analysis (CoA) with each batch, including chromatographic purity data, water content, and trace impurity profiles. Bulk purchases may offer cost advantages, but buyers should consider shelf life and usage rates to avoid waste. Transportation regulations for flammable liquids must be observed for safe delivery.
Related Manufacturers
- 主营：二甲苯、聚苯胺、脯氨酸甲酯盐酸盐、苄基三甲基氯化铵
- 主营：钩藤碱、丹皮酚、c17h26o10、二甲氧基甲苯、高良姜、丹参酮、鞣花酸、川楝素、苍术素、芦竹碱、管花苷、苦参碱、土贝母、柚皮素、白麻苷、甜菜碱、紫草素、络石苷、木皂苷、苏木素、甘露糖、番茄碱、青蒿酸、皂苷rg2、芹菜素、紫杉醇
- 主营：乙蒜素、氨乙基、防腐剂、壬二酸、二碳二酸、戊二烯二环、己二胺哌啶、基二苯甲烷、6-二氯苯腈、3，4-二氟苯腈、143487-47-2、三唑硫酮、羟基硅油、邻氯苯腈、玫瑰精贝司、基三甲氧基、苯基噻唑脲、氯代异丙烷、甘油基氨基、椰油酰胺丙基、甲基丙烯酸六、色谱分析试剂、双六氟磷酸盐、甲基苯甲酰胺、邻氰基苯甲醛
- 主营：质控样品、试液、缓冲液、分析标准品、指示液、滴定液、标准溶液、标准物质、标准样品
- 主营：对照品、当归酸酐、佛手柑内酯、标准品、新当归内酯、补骨脂甲素、补骨脂乙素、羟基芍药苷、阿魏酸松柏酯、水合氧化前胡素、豆甾醇葡萄糖苷
- 主营：对照品、科研实验、试剂盒、二甲苯、多糖、安石榴苷、儿茶素、绿原酸、尿石素、人参皂苷、花青素、维生素、异鼠李素、甘草系列、人参系列、补骨脂系列、雷公藤系列、黄芩系列、柴胡系列、丹参系列、酸枣仁系列、重楼系列、大黄系列、五味子系列、化合物、黄芪皂苷系列
- 主营：脱漆剂、交联剂、异己烷、壬二酸、辛二酸、戊二酸、己二醇、戊二醇、清洗剂、氯代叔丁烷、正癸烷
- 主营：二甲氧基甲苯、白蜡树素、百两金素、半齿泽兰素
- 主营：吡咯酯、藜芦酮、麦芽酚、二羟基甲苯、铃兰醛、吴茱萸碱、聚谷氨酸、3-吲哚甲醛、农药中间体、7-羟基香豆素、4-羟基香豆素、6-氰基-2-萘酚、5-甲氧基色胺、6-甲基香豆素、β-氯代苯乙烷
- 主营：二甲苯、金属催化剂
- 主营：芦丁标准品、对照品标准品、酒渣碱、异常山乙素
- 主营：莪术二酮、人参皂苷rc
- 主营：桉油精、薄荷脑、中药对照品、标准品、白花前胡丙素、白藜芦醇三甲醚
- 主营：二甲苯、中药对照品
- 主营：二甲苯、顺-6-壬烯-1-醇