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名称:咖啡酸
 

纯度:98.2% 包装:25Kg桶装

结构式
             

CAS:   331-39-5
分子式:  C9H8O4
分子量: 180.16

中文名称:   咖啡酸
                    3,4-二羟基肉桂酸
                    3,4-二羟基苯丙烯酸
                    3-(3,4-二羟苯基)-2-丙烯酸
                    β-(3,4-二羟苯基)丙烯酸
 
英文名称:   3,4-dihydroxy-cinnamic acid
                    3-(3,4-dihydroxyphenyl)-2-propenoic acid
                    3,4-dihydroxybenzeneacrylic acid
                    3,4-dihydroxycinnamic acid

性质描述:  黄色结晶(水)。熔点194-198℃(分解),194℃ 软化,可溶于热水、乙醇,微溶于冷水,遇碱液变橙色,有刺激性,E型咖啡酸熔点223-225℃ (分解)。

用途:  用于有机合成。

质量标准
1 、三氯化铁显色反应        符合规定 
2 、应在323nm的波长处有最大吸收,在261nm咖啡酸的波长处有最小吸收。 符合规定 
3 、咖啡酸的水溶液加盐酸及亚硝酸钠,再加氢氧化钠呈碱性,呈红色。 符合规定 
                                                                        
性状                      嫩黄色结晶或结晶性粉末,无臭。                     
1 熔点℃              219-224                                                                    
2 氯化物≤           0.01%                                                                         
3 水分≤               0.5%                                                                          
4 重金属≤           0.0015%                                                                   
5 灼烧残渣           <0.2%                                                                         
6 红外含量测定   干品计,含量C9H8O4≥98.0% 

其它信息:
Product Identification
【Product Name】Caffeic acid  咖啡酸
【Synonyms】
3-(3,4-Dihydroxyphenyl)-2-propenoic acid
3,4-Dihydroxybenzeneacrylic acid
3,4-Dihydroxycinnamic acid
4-(2-Carboxyethenyl)-1,2-dihydroxybenzene
4-(2'-Carboxyvinyl)-1,2-dihydroxybenzene
【CAS】331-39-5
【Formula】C9H8O4
【Molecular Weight】180.16
【EINECS】206-361-2
【RTECS】GD8950000
【RTECS Class】Tumorigen; Mutagen; Reproductive Effector; Natural Product
【Merck】13,1635
【Beilstein/Gmelin】2210883
【Beilstein Reference】2-10-00-00294
【EC Class】carcinogenic
Physical and Chemical Properties
【Appearance】Yellow prisms or plates (from chloroform or ligroin) or pale yellow granules. Alkaline solutions turn from yellow to orange.
【Solubility in water】Very soluble
【Melting Point】234 - 237
【Boiling Point】366
【pKa/pKb】4.04 (pKa)
【Partition Coefficient】1.15
【Usage】Inhibitor of poly(ethylene glycol) oxidation.
First Aid Measures
【Ingestion】If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
【Inhalation】Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
【Skin】Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
【Eyes】Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Handling and Storage
【Storage】Store in a cool, dry place. Keep container closed when not in use.
【Handling】Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Hazards Identification
【Inhalation】The toxicological properties of this substance have not been fully investigated.
【Skin】No information regarding skin irritation and other potential effects was found.
【Eyes】May cause eye irritation. No information regarding eye irritation and other potential effects was found.
【Ingestion】The toxicological properties of this substance have not been fully investigated.
【EC Risk Phrase】R 36/37/38 40
【EC Safety Phrase】S 22 26 36/37/39
Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear safety glasses and chemical goggles if splashing is possible. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
【Respirators】Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
【Exposure Effects】The toxological properties of this substance have not been fully investigated.
Fire Fighting Measures
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
【Fire Potential】This material is probably combustible.
Accidental Release Measures
【Small spills/leaks】Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.
Stability and Reactivity
【Disposal Code】4
【Stability】Stable under normal temperatures and pressures.
【Incompatibilities】Strong oxidizing agents - strong bases.
【Decomposition】Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Transport Information
【HS Code】2918 29 90



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