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General tariff:30.0%",[339,342,344,347,350,353,356,359,362,365,368,371],{"key":340,"value":341},"符号","GHS07, GHS08",{"key":343,"value":245},"信号词",{"key":345,"value":346},"危害声明","H302-H360D",{"key":348,"value":349},"警示性声明","P201-P308 + P313",{"key":351,"value":352},"个人防护装备","Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter",{"key":354,"value":355},"危害码 (欧洲)","Xn:Harmful;",{"key":357,"value":358},"风险声明 (欧洲)","R22",{"key":360,"value":361},"安全声明 (欧洲)","S53-S45",{"key":363,"value":364},"危险品运输编码","NA 1993 \u002F PGIII",{"key":366,"value":367},"WGK德国","3",{"key":369,"value":370},"RTECS号","YU2625000",{"key":327,"value":372},"2924210090","\u003Ctd>\n\n\u003Cp>\u003Cstrong>四甲基脲毒理学数据:\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cp>\u003C\u002Fp>\u003Cp> 大鼠经口LD50：1400mg\u002Fkg。对妊娠13日的大鼠给予500mg\u002Fkg，则出现畸胎。 \u003C\u002Fp>\n\u003Cp>\u003C\u002Fp>\n\u003Cp>\u003Cstrong>四甲基脲生态学数据:\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cp>\u003C\u002Fp>\u003Cp>对水是危害的，不要让该产品接触地下水，水道污水系统，即使是小量该产品渗入地下水也会对饮用水造成危害，对水中有机物质有毒。若无政府许可，勿将材料排入周围环境。\u003C\u002Fp>\n\u003Cp>\u003C\u002Fp>\n\u003Cp>\u003Ca href=\"\u002Fen\u002Fcas\u002F632-22-4_509703.html#duXinDiv\">四甲基脲毒性英文版\u003C\u002Fa>\u003C\u002Fp>\n\n\u003C\u002Ftd>","\u003Cp> 目前，四甲基脲的主要制备方法有以下两种。\u003Cbr \u002F>（1）二甲胺光气法　其反应式如下：\u003Cbr \u002F>　　　　上述反应中的热效应十分剧烈，因而在大量制备时较难控制，同时在分离操作上也存在一定困难。可以先将中间产物（1）分离出来，然后使其再与二甲胺发生作用。制备实例：取135g(1.17mol)40％二甲胺的水溶液加入装有搅拌器的四颈瓶中，瓶的外壁用冰盐混合物加以冷却；然后在搅拌下滴加１０７ｇ中间产物(1),维持体系的液温在－10℃以下。滴加(1)的程序是：当加入(1)20ml后，就开始同时滴加40％液碱100ml，然后再加固碱60g。反应完毕，反应液形成两层，上层减压蒸馏后即得四甲基脲；\u003Cbr \u002F>下层可用苯抽取，将抽取液去苯后分馏又可得四甲基脲，合计收率80％～85％。\u003Cbr \u002F>(2)碳酸二苯酯氨解法\u003Cbr \u002F>制备实例：向2140g(10mol)碳酸二苯酯中于冷却下通入二甲胺气流1150g(25mol)。然后在压力釜中加热到200℃(约2.0MPa)4h。冷却后，将反应物加入到71.5mol\u002FL的氢氧化钠溶液中，搅拌均匀后，用乙醚抽提。分离出抽体液并进行减压分馏，收集60~66℃(1.73kPa)的馏分，共得四甲基脲850g(四甲基脲得常压沸点为74.5℃)。\u003Cbr \u002F> \u003C\u002Fp>","\u003Ctd>\n\r\n                                        \r\n                                        四甲基脲\n\u003Cbr \u002F>\n\n\u003Cstrong>模块1. 化学品\u003C\u002Fstrong>\n\u003Cbr \u002F> 产品名称：\n\u003Cb>Tetramethylurea\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块2. 危险性概述\u003C\u002Fstrong>\n\u003Cbr \u002F>\n\u003Cb>GHS分类\u003C\u002Fb>\n\u003Cbr \u002F> 　物理性危害\n\u003Cbr \u002F> 易燃液体\n\u003Cb>第4级\u003C\u002Fb>\n\u003Cbr \u002F> 　健康危害\n\u003Cbr \u002F> 急性毒性（经口）\n\u003Cb>第4级\u003C\u002Fb>\n\u003Cbr \u002F> 急性毒性（经皮）\n\u003Cb>第5级\u003C\u002Fb>\n\u003Cbr \u002F> 　环境危害未分类\n\u003Cbr \u002F>\n\u003Cb>GHS标签元素\u003C\u002Fb>\n\u003Cbr \u002F> 　图标或危害标志\n\u003Cbr \u002F> 　信号词警告\n\u003Cbr \u002F> 　危险描述可燃液体\n\u003Cbr \u002F> 吞咽有害。\n\u003Cbr \u002F> 皮肤接触可能有害\n\u003Cbr \u002F> 　防范说明\n\u003Cbr \u002F>\n\u003Cb>[预防]\u003C\u002Fb>\n\u003Cb>远离明火\u002F热表面。\u003C\u002Fb>\n\u003Cbr \u002F> 使用本产品时切勿吃东西，喝水或吸烟。\n\u003Cbr \u002F> 处理后要彻底清洗双手。\n\u003Cbr \u002F>\n\u003Cb>穿戴防护手套\u002F护目镜\u002F防护面具。\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>[急救措施]\u003C\u002Fb>\n\u003Cb>食入：若感不适，呼叫解毒中心\u002F医生。漱口。\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>若感不适：呼叫解毒中心\u002F医生。\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>[储存]\u003C\u002Fb>存放于通风良好处。保持凉爽。\n\u003Cbr \u002F>\n\u003Cb>[废弃处置]\u003C\u002Fb>\n\u003Cb>根据当地政府规定把物品\u002F容器交与工业废弃处理机构。\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块3. 成分\u002F组成信息\u003C\u002Fstrong>\n\u003Cbr \u002F>\n\u003Cb>单一物质\u002F混和物\u003C\u002Fb>单一物质\n\u003Cbr \u002F>\n\u003Cb>化学名(中文名)：\u003C\u002Fb>四甲基脲\n\u003Cbr \u002F> 四甲基脲\n\u003Cbr \u002F>\n\n\u003Cstrong>模块3. 成分\u002F组成信息\u003C\u002Fstrong>\n\u003Cbr \u002F> 百分比：\n\u003Cb>>98.0%(GC)\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>CAS编码：\u003C\u002Fb>\n\u003Cb>632-22-4\u003C\u002Fb>\n\u003Cbr \u002F> 分子式：\n\u003Cb>C5H12N2O\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块4. 急救措施\u003C\u002Fstrong>\n\u003Cbr \u002F> 吸入：\n\u003Cb>将受害者移到新鲜空气处，保持呼吸通畅，休息。若感不适立即呼叫解毒中心\u002F医生。\u003C\u002Fb>\n\u003Cbr \u002F> 皮肤接触：\n\u003Cb>立即去除\u002F脱掉所有被污染的衣物。用大量肥皂和水轻轻洗。\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>若皮肤刺激或发生皮疹：求医\u002F就诊。\u003C\u002Fb>\n\u003Cbr \u002F> 眼睛接触：用水小心清洗几分钟。如果方便，易操作，摘除隐形眼镜。继续清洗。\n\u003Cbr \u002F>\n\u003Cb>如果眼睛刺激：求医\u002F就诊。\u003C\u002Fb>\n\u003Cbr \u002F> 食入：\n\u003Cb>若感不适，呼叫解毒中心\u002F医生。漱口。\u003C\u002Fb>\n\u003Cbr \u002F> 紧急救助者的防护：救援者需要穿戴个人防护用品，比如橡胶手套和气密性护目镜。\n\u003Cbr \u002F>\n\n\u003Cstrong>模块5. 消防措施\u003C\u002Fstrong>\n\u003Cbr \u002F> 合适的灭火剂：干粉，泡沫，大量水，二氧化碳\n\u003Cbr \u002F> 特殊危险性：小心，燃烧或高温下可能分解产生毒烟。\n\u003Cbr \u002F> 特定方法：从上风处灭火，根据周围环境选择合适的灭火方法。\n\u003Cbr \u002F> 非相关人员应该撤离至安全地方。\n\u003Cbr \u002F> 周围一旦着火：如果安全，移去可移动容器。\n\u003Cbr \u002F> 消防员的特殊防护用具：灭火时，一定要穿戴个人防护用品。\n\u003Cbr \u002F>\n\n\u003Cstrong>模块6. 泄漏应急处理\u003C\u002Fstrong>\n\u003Cbr \u002F> 个人防护措施，防护用具，\n\u003Cb>使用个人防护用品。远离溢出物\u002F泄露处并处在上风处。确保足够通风。\u003C\u002Fb>\n\u003Cbr \u002F> 紧急措施：泄露区应该用安全带等圈起来，控制非相关人员进入。\n\u003Cbr \u002F> 环保措施：防止进入下水道。\n\u003Cbr \u002F> 控制和清洗的方法和材料：用合适的吸收剂（如：旧布，干砂，土，锯屑）吸收泄漏物。一旦大量泄漏，筑堤控\n\u003Cbr \u002F> 制。附着物或收集物应该立即根据合适的法律法规废弃处置。\n\u003Cbr \u002F> 副危险性的防护措施移除所有火源。一旦发生火灾应该准备灭火器。使用防火花工具和防爆设备。\n\u003Cbr \u002F>\n\n\u003Cstrong>模块7. 操作处置与储存\u003C\u002Fstrong>\n\u003Cbr \u002F> 处理\n\u003Cbr \u002F> 技术措施：在通风良好处进行处理。穿戴合适的防护用具。防止烟雾产生。远离明火和热表面。\n\u003Cbr \u002F> 采取措施防止静电积累。使用防爆设备。处理后彻底清洗双手和脸。\n\u003Cbr \u002F> 注意事项：使用封闭系统，通风。\n\u003Cbr \u002F> 操作处置注意事项：避免接触皮肤、眼睛和衣物。\n\u003Cbr \u002F> 贮存\n\u003Cbr \u002F> 储存条件：保持容器密闭。存放于凉爽、阴暗、通风良好处。\n\u003Cbr \u002F> 存放于惰性气体环境中。\n\u003Cbr \u002F> 防湿。\n\u003Cbr \u002F> 远离不相容的材料比如氧化剂存放。\n\u003Cbr \u002F> 易湿\n\u003Cbr \u002F> 包装材料：依据法律。\n\u003Cbr \u002F>\n\n\u003Cstrong>模块8. 接触控制和个体防护\u003C\u002Fstrong>\n\u003Cbr \u002F> 工程控制：尽可能安装封闭体系或局部排风系统，操作人员切勿直接接触。同时安装淋浴器和洗\n\u003Cbr \u002F> 眼器。\n\u003Cbr \u002F> 个人防护用品\n\u003Cbr \u002F> 　呼吸系统防护：防毒面具。依据当地和政府法规。\n\u003Cbr \u002F> 　手部防护：防护手套。\n\u003Cbr \u002F> 四甲基脲\n\u003Cbr \u002F>\n\n\u003Cstrong>模块8. 接触控制和个体防护\u003C\u002Fstrong>\n\u003Cbr \u002F> 　眼睛防护：安全防护镜。如果情况需要，佩戴面具。\n\u003Cbr \u002F> 　皮肤和身体防护：防护服。如果情况需要，穿戴防护靴。\n\u003Cbr \u002F>\n\n\u003Cstrong>模块9. 理化特性\u003C\u002Fstrong>\n\u003Cbr \u002F> 液体\n\u003Cbr \u002F>\n\u003Cb>外形（20°C）：\u003C\u002Fb>\n\u003Cbr \u002F> 外观：透明\n\u003Cbr \u002F> 颜色：\n\u003Cb>无色-浅黄色\u003C\u002Fb>\n\u003Cbr \u002F> 气味：无资料\n\u003Cbr \u002F>\n\u003Cb>pH:\u003C\u002Fb>无数据资料\n\u003Cbr \u002F> 熔点：\n\u003Cb>-1°C\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>沸点\u002F沸程\u003C\u002Fb>\n\u003Cb>177 °C\u003C\u002Fb>\n\u003Cbr \u002F> 闪点：\n\u003Cb>75°C\u003C\u002Fb>\n\u003Cbr \u002F> 爆炸特性\n\u003Cbr \u002F> 　爆炸下限：无资料\n\u003Cbr \u002F> 　爆炸上限：无资料\n\u003Cbr \u002F> 密度：\n\u003Cb>0.97\u003C\u002Fb>\n\u003Cbr \u002F> 溶解度：\n\u003Cbr \u002F>\n\u003Cb>[水]\u003C\u002Fb>混和\n\u003Cbr \u002F>\n\u003Cb>[其他溶剂]\u003C\u002Fb>\n\u003Cbr \u002F> 混和：\n\u003Cb>醚, 酒精\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块10. 稳定性和反应性\u003C\u002Fstrong>\n\u003Cbr \u002F> 化学稳定性：一般情况下稳定。\n\u003Cbr \u002F> 危险反应的可能性：未报道特殊反应性。\n\u003Cbr \u002F> 避免接触的条件：明火\n\u003Cbr \u002F> 须避免接触的物质氧化剂\n\u003Cbr \u002F>\n\u003Cb>危险的分解产物:\u003C\u002Fb>\n\u003Cb>一氧化碳, 二氧化碳, 氮氧化物 (NOx)\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块11. 毒理学信息\u003C\u002Fstrong>\n\u003Cbr \u002F> 急性毒性：\n\u003Cb>orl-rat LD50:794 mg\u002Fkg\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>skn-rbt LD50:3160 mg\u002Fkg\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>ihl-rat LCLo:312 ppm\u002F4H\u003C\u002Fb>\n\u003Cbr \u002F> 对皮肤腐蚀或刺激：无资料\n\u003Cbr \u002F> 对眼睛严重损害或刺激：无资料\n\u003Cbr \u002F> 生殖细胞变异原性：\n\u003Cb>dni-hmn-lym 10 mmol\u002FL\u003C\u002Fb>\n\u003Cbr \u002F> 致癌性：\n\u003Cbr \u002F>\n\u003Cb>IARC =\u003C\u002Fb>无资料\n\u003Cbr \u002F>\n\u003Cb>NTP =\u003C\u002Fb>无资料\n\u003Cbr \u002F> 生殖毒性：\n\u003Cb>skn-rat TDLo: 600 mg\u002Fkg(9D preg)\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>orl-rat TDLo: 250 mg\u002Fkg(12D preg)\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>orl-mus TDLo: 1 gm\u002Fkg(10D preg)\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>orl-mus TDLo: 1499 mg\u002Fkg(8D preg)\u003C\u002Fb>\n\u003Cbr \u002F>\n\u003Cb>RTECS 号码:\u003C\u002Fb>\n\u003Cb>YU2625000\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块12. 生态学信息\u003C\u002Fstrong>\n\u003Cbr \u002F> 生态毒性：\n\u003Cbr \u002F> 鱼类：无资料\n\u003Cbr \u002F> 甲壳类：无资料\n\u003Cbr \u002F> 藻类：无资料\n\u003Cbr \u002F>\n\u003Cb>残留性 \u002F 降解性：\u003C\u002Fb>无资料\n\u003Cbr \u002F> 四甲基脲\n\u003Cbr \u002F>\n\n\u003Cstrong>模块12. 生态学信息\u003C\u002Fstrong>\n\u003Cbr \u002F>\n\u003Cb>潜在生物累积 （BCF):\u003C\u002Fb>无资料\n\u003Cbr \u002F> 土壤中移动性\n\u003Cbr \u002F>\n\u003Cb>　log水分配系数：\u003C\u002Fb>无资料\n\u003Cbr \u002F>\n\u003Cb>　土壤吸收系数 （Koc）：\u003C\u002Fb>无资料\n\u003Cbr \u002F> 　亨利定律无资料\n\u003Cbr \u002F>\n\u003Cb>constant(PaM3\u002Fmol):\u003C\u002Fb>\n\u003Cbr \u002F>\n\n\u003Cstrong>模块13. 废弃处置\u003C\u002Fstrong>\n\u003Cbr \u002F> 如果可能，回收处理。请咨询当地管理部门。建议在装有后燃和洗涤装置的化学焚烧炉中焚烧。废弃处置时请遵守\n\u003Cbr \u002F> 国家、地区和当地的所有法规。\n\u003Cbr \u002F>\n\n\u003Cstrong>模块14. 运输信息\u003C\u002Fstrong>\n\u003Cbr \u002F> 联合国分类：与联合国分类标准不一致\n\u003Cbr \u002F>\n\u003Cb>UN编号：\u003C\u002Fb>未列明\n\u003Cbr \u002F>\n\n\u003Cstrong>模块15. 法规信息\u003C\u002Fstrong>\n\u003Cbr \u002F>\n\u003Cb>《危险化学品安全管理条例》（2002年1月26日国务院发布，2011年2月16日修订）: 针对危险化学品的安全使用、\u003C\u002Fb>\n\u003Cbr \u002F> 生产、储存、运输、装卸等方面均作了相应的规定。\n\u003Cbr \u002F>\n\u003Cbr \u002F>\n\n\u003Cstrong> 模块16 - 其他信息 \u003C\u002Fstrong>\n\u003Cbr \u002F>N\u002FA\n\u003Cbr \u002F>\u003Cbr \u002F>\u003Cbr \u002F>\u003Cbr \u002F>\u003Cbr \u002F>\n\u003Cbr \u002F>\n\u003C\u002Ftd>","2026-08-21T07:51:12.859463Z",false,[379,385,391,397,403,409],{"slug":380,"cid":381,"name":382,"nameZh":383,"cas":384},"785897869264556032","J-1102589-6","1-aminohydantoin","1-氨基海因","6301-02-6",{"slug":386,"cid":387,"name":388,"nameZh":389,"cas":390},"785883172012298240","J-1369979-4","2-ethylpiperazine","2-乙基哌嗪","13961-37-0",{"slug":392,"cid":393,"name":394,"nameZh":395,"cas":396},"785889498956304384","J-1361752-5","1-Methyl-1,4-diazepane","N-甲基高哌嗪","4318-37-0",{"slug":398,"cid":399,"name":400,"nameZh":401,"cas":402},"785880477188755456","J-15724-9","1-Piperazinecarbaldehyde","1-甲酰基哌嗪","7755-92-2",{"slug":404,"cid":405,"name":406,"nameZh":407,"cas":408},"785895684636151808","J-42541-6","2-Methoxy-3-methylpyrazine","2-甲氧基-3-甲基吡嗪","2847-30-5",{"slug":410,"cid":411,"name":412,"nameZh":413,"cas":414},"785898480311734272","J-50484-1","Niobium carbide","碳化铌","12069-94-2",1792611378026,"zh-CN",[]]