| CAS: | 97-59-6 | ||||||||||||||||||||
| 分子式: | C4H6N4O3 | ||||||||||||||||||||
| 分子量: | 158.12 | ||||||||||||||||||||
| 熔点: | 230℃ | ||||||||||||||||||||
| 中文名称: |
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| 英文名称: |
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| 性质描述: | 无色结晶性粉末。熔点238-240℃(分解)。能溶于热水、热醇和稀氢氧化钠溶液,微溶于水和醇,几乎不溶于醚和氯仿。无臭、无味。在干燥空气中稳定,在水中长时间煮沸或强碱中则被破坏。饱和水溶液的pH为5.5。 | ||||||||||||||||||||
| 生产方法: | 尿囊素存在于悄囊液,胎儿尿及一些植物中。但从这些物质中提取囊素成本太高。目前合成尿囊素的方法有:高猛酸钾氧化脲酸法:二氯乙酸与脲加热合成尿囊素;乙醛酸与脲直接缩合法。1.以二氯乙酸和脲为原料工艺过程如下:在反应罐内投入甲醇钠溶液和甲醇,加热至40-50℃,缓缓滴加二氯乙酸,加完后回流反应2h。冷至室温,过滤,甲醇洗涤,合并洗滤液,行二甲氧基酸钠甲醇溶液。将此溶液减压深缩至干,加入2.8份盐酸,于水浴上加热并搅拌成糊状。然后升温至90℃,再冷至10℃左右,过滤,小液加入0.25份盐酸与脲,加热溶解,于80℃反应2h。冷却结晶,再于0℃维持3h以上,离心、水洗、甩干、干燥得精品。粗品用15倍水重结晶后得尿囊素。对二氯乙酸的总收率30.3%。2.乙醛酸与脲直接缩合(乙醛酸由乙二醛经氧化而得)操作实例:(1)氧化在装有机械搅拌、冷凝器、温度计和滴液漏斗的500ml四口瓶中,加入193g(1mol)30%乙二醛水溶液,控制内温40±2℃搅拌下滴加135.5g(1mol)45%硝酸,加毕继续 在该温度搅拌反应2-3h,至红棕色氧化不再逸出,反应液呈蓝绿色即消失。换成简单蒸馏装置,在约2.76kPa、外温不超过60℃下蒸出水分约125g,浓缩液在室温静止过夜,析出之草酸结晶(干燥后得19g,合0.21mol),浓度为39%)。继续在内温40±2℃搅拌反应约8h,氧化反应即告完成。(2)缩合 在装有机械搅拌、冷凝器和温度计的500ml三口烧瓶中,加入上述150g乙醛酸水溶液,再加入170g(2.83mol)尿素和23.3g浓盐酸,搅拌下加热至内温达80℃。约15min后尿素溶解,反应物呈透明液,再过约30-45min,反应物出现白浊,继而白色沉淀渐渐增多,在内温80℃下搅拌1h,停止加热并将反应物冷却及室温,用布氏漏斗收集白色沉淀,冷水沉淀数次,即得粗品尿囊素。用1000ml蒸馏水重结晶。得白色细结晶尿囊素60-63%,溶点236℃(分解)。以乙二醛计,尿囊素得率为理论的38-40%(重量得率为103-108%)。 | ||||||||||||||||||||
| 用途: | 尿囊素具有促进皮细胞生长,使伤口迅速愈合的作用。用作抗溃疡药,与干燥氢氧化铝凝胶混和,用于消化道溃疡及炎症。该品又能软化角质素,使皮肤保持水分、滋润和柔软,是化妆品的特效添加剂。尿囊互及其衍生物还是许多日用化工产品的品质改良剂、添加剂。尿囊素蛋白质可配制抗刺激、抗头皮屑、清洁及使伤口愈合的头皮制剂,能使头发柔软,有光泽和弹性。该品是一种两性化合物,能结合多种物质形式复盐,具有避光、杀菌防腐、止痛、除臭、抗氧化作用,因此是日用化工产品,美容化妆品如雀斑霜、粉刺液、香波、肥皂、牙膏、刮脸洗剂,收敛液、抗汗除臭洗涤剂等的添加剂。尿囊素还是一种生化试剂。 |
| 货号 | 品牌 | 产品名称 | 规格 | 包装、参考价格 | 详情 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| A800174 | MACKLIN | 尿囊素 | 98% | 30元/25g; 41元/100g; 101元/500g; 360元/2.5kg; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
储存:2~8°C 状态:白色至淡黄色粉末 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| A0211 | TCI | Allantoin | >98.0%(T) | 155元/25G; 895元/500G; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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| 248457 | J&K | Allantoin | 98% | 174元/100G; 693元/500G; 2767元/2.5KG; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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| 982103 | J&K | Allantoin | 来源于王不留行, 有效含量≥90%, 可溯源至中检院标准品 | 65元/25MG; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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| A15571 | Alfa Aesar | Allantoin | 98% | 945元/250g; 3140元/1000g; 13363元/5000g; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
应用 备注 基本信息 MDL EINECS 分子式 分子量 熔点 灵敏度 形态 溶解性 Beilstein Merck 安全信息 RTECS TSCA | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 05670 | Sigma-Aldrich | Allantoin | ≥98.0% (N) | 556.16元/25G; 679.16元/100G; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
产品说明 应用 反应物用于: 生化/生理作用 通过尿酸途径的嘌呤代谢物。尿酸也可与自由基反应生成尿囊素,因此尿囊素可作为氧化应激反应的有效生物标记。 基本信息
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| A0349000 | Allantoin | European Pharmacopoeia (EP) Reference Standard | 1277.32元/ ; | 展开 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
产品说明 一般描述 This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia. 生化/生理作用 通过尿酸途径的嘌呤代谢物。尿酸也可与自由基反应生成尿囊素,因此尿囊素可作为氧化应激反应的有效生物标记。 包装 Unit quantity: 60 mg. Subject to change. The product is delivered as supplied by the issuing Pharmacopoeia. For the current unit quantity, please visit the EDQM reference substance catalogue. 注意 Please find SDS provided by EDQM here.. 其他说明 Sales restrictions may apply. 基本信息
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| PHR1364 | Supelco | Allantoin | Pharmaceutical Secondary Standard; Certified Reference Material | 1631.37元/500 MG; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
产品说明 一般描述 Allantoin, the final catabolic product of purines in mammals, is a highly polar and amphoteric substance. Allantoin is mainly used for skin protection as the drug promotes cell proliferation and wound healing. 应用 These Secondary Standards are qualified as Certified Reference Materials. These are suitable for use in several analytical applications including but not limited to pharma release testing, pharma method development for qualitative and quantitative analyses, food and beverage quality control testing, and other calibration requirements. 生化/生理作用 通过尿酸途径的嘌呤代谢物。尿酸也可与自由基反应生成尿囊素,因此尿囊素可作为氧化应激反应的有效生物标记。 分析说明 These secondary standards offer multi-traceability to the USP, EP (PhEur) and BP primary standards, where they are available. 其他说明 This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis. 附注 To see an example of a Certificate of Analysis for this material enter LRAA1468 in the slot below. This is an example certificate only and may not be the lot that you receive. 基本信息
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| 93791 | Supelco | Allantoin | analytical standard | 1759.06元/50 MG; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
产品说明 应用 尿囊素可作为分析参考标准品,通过不同的色谱技术对生物学样品中的分析物进行定量。 生化/生理作用 通过尿酸途径的嘌呤代谢物。尿酸也可与自由基反应生成尿囊素,因此尿囊素可作为氧化应激反应的有效生物标记。 包装 无底玻璃瓶。内含物在插入的融合锥体内。 基本信息
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| 1012939 | USP | Allantoin | United States Pharmacopeia (USP) Reference Standard | 3231.47元/200 MG; | 展开 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
产品说明 一般描述 This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia. 生化/生理作用 通过尿酸途径的嘌呤代谢物。尿酸也可与自由基反应生成尿囊素,因此尿囊素可作为氧化应激反应的有效生物标记。 分析说明 These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind. 其他说明 USP issued SDS can be found here. 基本信息
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| PHL89518 | Allantoin | phyproof® Reference Substance | 3048.57元/100 MG; | 展开 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
产品说明 一般描述 This substance is a primary reference substance with assigned absolute purity (considering chromatographic purity, water, residual solvents, inorganic impurities). The exact value can be found on the certificate. Produced by PhytoLab GmbH & Co. KG 生化/生理作用 通过尿酸途径的嘌呤代谢物。尿酸也可与自由基反应生成尿囊素,因此尿囊素可作为氧化应激反应的有效生物标记。 法律信息 phyproof is a registered trademark of PhytoLab GmbH & Co. KG 基本信息
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