Overview
Acetaldehyde is a fundamental aldehyde compound with the formula CH3CHO. It occurs naturally in coffee, bread, and ripe fruits but is primarily produced industrially via ethylene oxidation or ethanol dehydrogenation. As a key intermediate in chemical manufacturing, it serves as a precursor to acetic acid, pyridine derivatives, and pentaerythritol. The global market for acetaldehyde is driven by demand from the plastics, food, and pharmaceutical industries. Its high reactivity makes it valuable for synthesis, though its volatility and flammability require careful handling.
Physical and Chemical Properties
Acetaldehyde is a colorless liquid with a sharp, fruity odor detectable at low concentrations. It has a low boiling point (20.2°C), making it highly volatile. The compound is miscible with water and most organic solvents, forming azeotropic mixtures. Chemically, acetaldehyde readily undergoes reactions such as aldol condensation, oxidation (to acetic acid), and reduction (to ethanol). Its carbonyl group makes it reactive with nucleophiles, enabling diverse synthetic applications. Stability issues arise from its tendency to polymerize or form peroxides under light or heat.
Main Applications
In the chemical industry, acetaldehyde is a precursor for acetic acid, acetic anhydride, and butadiene. It’s used to manufacture resins (e.g., urea-formaldehyde), dyes, and pharmaceuticals like sedatives and vitamins. The food industry employs it as a flavoring agent (FFEMA 2005) and in silvering mirrors. Another major use is in producing pentaerythritol, a polyol for paints and explosives. Emerging applications include bio-based plastics, though regulatory pressures on formaldehyde derivatives may impact demand.
Safety and Storage
Acetaldehyde is classified as a Class I flammable liquid (NFPA) and poses significant fire/explosion risks. Storage requires inert atmospheres or antioxidant stabilizers to prevent polymerization. OSHA’s PEL is 200 ppm, while ACGIH recommends a TLV of 25 ppm due to its irritant and carcinogenic potential. Leaks must be contained with non-sparking tools, and PPE (gloves, goggles, respirators) is mandatory during handling. Waste disposal follows EPA guidelines for volatile organic compounds (VOCs).
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis). Key specifications include purity (≥99.5%), water content (<0.1%), and absence of peroxides. Bulk shipments typically use stainless steel tankers or UN-certified drums. Regional pricing varies with ethylene feedstock costs. Just-in-time procurement is advised due to storage challenges. Alternatives like paraldehyde (trimer) may suit safer transport needs.
Related Manufacturers
- 主营：磷酸三甲苯酯、氨基甲酸乙酯、磷酸甲苯二苯酯、溴代乙醛缩乙二醇、甲乙酮肟、四乙基溴化铵、碳酸二丁酯、环烷酸铅、亚硫酸铵、二苯甲酮腙、石油磺酸钠、三乙醇胺、甲醇、乙醇、二甲苯、二氯甲烷、环烷酸铜、氨基甲酸甲酯、单过硫酸氢钾、氯化石蜡、三异丙醇胺、苄基三甲基氯化铵、苄基三乙基氯化铵、四乙基氯化铵、四甲基氯化铵、新癸酸铋
- 主营：科研试剂盒、酶免试剂盒、elisa试剂盒、豚鼠乙醛脱氢酶2、细胞、生物试剂、进口ELISI试剂盒、PCR试剂盒
- 主营：四氢噻吩、二甲基亚砜、二甲基二硫醚、一氯乙醛、乙酰氯、氢氟酸、二甲苯、甲酰胺、丙烯腈、正丙醇、水杨酸、甲酸钠、正丙醛、苯甲醛、丙二腈、二甲基硫醚、硬脂酸、石油醚、水合肼、氯乙酸、乙二醛、乙二醇、异戊烷、苯乙烯、仲丁胺、叔丁醇
- 主营：石油醚、四氢噻吩、顺酐、苯酐
- 主营：单体香料、单方精油、基础油
- 主营：乙醛、荧光染料、花青素染料
- 主营：保水剂、酸度调节剂、表面活性剂、甲基壬乙醛、食品添加剂
- 主营：药品检测标准品、药物杂质标准品、对照品、中药对照药材、中药农残空白基质、分析标准品、仪器检测校准品、金属离子标准溶液、滴定溶液、食品检测标准物质、有机检测标准溶液、指示液、缓冲液、电导率溶液、PH标准溶液、熔点标准品、国家标准物质、比色液
- 主营：对照品、标准品、当归酸酐、乙醛24、佛手柑内酯、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：化学试剂、实验室试剂、实验室耗材、化玻仪器、卡尔费休、化玻、实验仪器、实验耗材
- 主营：甘氨酰、酸性橙、二苯胺、乙醛2、基嘧啶、氟甲烷、甲苯氟、脱乙基、苯丁锡、氰酸银、含苯基、咯喹酮、嘧菌酯、丁酸铝、肉桂醇、二辛基、特戊醛、茜素红、叶绿素、氟苯基、碲化钠、酸性红、噻虫啉、恶唑磷、颜料蓝、甲酰胺
- 主营：阻燃剂、拉那白、牛儿酮、氨基噻唑乙醛酸乙酯、海藻糖、热敏蓝、萘磺酸、氯菊酯、硫酸锌、催化剂、杨梅酯、檀香醚、聚醚胺、吸收剂、脂檀油、苍术素、羟钴胺、转移剂、溶剂绿、麝香酮、王浆酸、芬多精、纤维素、新戊酯、王冠醚、遮甜粉
- 主营：工业级白油、食品级白油、食品酒精、1227杀菌剂、无水乙醇、白凡士林、三乙醇胺、溶剂油、P507萃取剂、二甲基丙烯酰胺、正十二烷、8-羟基喹啉、阻聚剂701、聚乙二醇、三乙二醇、桐油、乙醇钠、乙酸乙酯、二甲苯
- 主营：聚苯胺、脯氨酸甲酯盐酸盐、苄基三甲基氯化铵
- 主营：异丙醇、冰醋酸、化工原料、二甲基乙醛、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、无水乙醇、正己烷