产品展厅
产品展厅
N,N-dimethylformamide
密度：0.945
储存注意事项 储存于阴凉、通风的库房。库温不宜超过37℃。远离火种、热源。保持容器密封。应与氧化剂、还原剂、卤素等分开存放，切忌混储。采用防爆型照明、通风设施。禁止使用易产生火花的机械设备和工具。储区应备有泄漏应急处理设备和合适的收容材料。
自燃温度：445 °C 致癌性：DMF is not carcinogenic toanimals except under very high inhalation exposure conditions.No increase in tumors was seen in rats thatinhaled 25, 100, or 400 ppm for 6 h/day, 5 days/week for2 years. Similarly, no tumors were producedin mice under the same conditions for 18 months. Inthat chronic experiment, rats and mice were exposed byinhalation (6 h/day, 5 days/week) to 0, 25, 100, or 400 ppmDMF for 18 months (mice) or 2 years (rats). Body weightsof rats exposed to 100 (males only) and 400 ppm werereduced and, conversely, body weights were increased in400 ppm mice. Serum sorbitol dehydrogenase activity wasincreased in rats exposed to 100 or 400 ppm. DMF-relatedmorphological changes in rats were observed only in theliver and consisted of increased relative liver weights,centrilobular hepatocellular hypertrophy, lipofuscin/hemosiderinaccumulation in Kupffer cells, and centrilobularsingle cell necrosis (400 ppm only). The same liver effectswere seen in all groups of mice, although the response at25 ppm was judged as minimal. 化学性质：N,N-Dimethylformamide is a colorless or slightly yellow liquid with a boiling point of 153°C and a vapor pressure of 380 Pa at 20°C. It is freely soluble in water and soluble in alcohols, acetone and benzene. N,N-Dimethylformamide is used as solvent, catalyst and gas absorbent. React violently with concentrated sulfuric acid, fuming nitric acid and can even explode. Pure Dimethylformamide is odorless, but industrial grade or modified Dimethylformamide has a fishy smell because it contains impurities of Dimethylamine. Dimethylformamide is unstable (especially at high temperatures) in the presence of a strong base such as sodium hydroxide or a strong acid such as hydrochloric acid or sulfuric acid, and is hydrolyzed to formic acid and dimethylamine.1.为非质子型极性溶剂，对多种有机化合物和无机化合物均有良好的溶解能力，在无碱、酸、水存在下，具有良好的化学稳定性。
2.化学性质：在无酸、碱、水存在下，即使加热到沸点也是比较稳定的。在酸的作用下分解成甲酸和二甲胺盐，而在碱的作用下则分解成甲酸盐和二甲胺。
3.受紫外线作用分解成二甲胺与甲醛，加热到350℃左右分解成二甲胺与一氧化碳。与盐酸形成比较稳定的等摩尔的加合物，其熔点为40℃，沸点为110℃。与SO3也能形成结晶性加合物，其熔点为138℃，沸点为145℃，DMF-SO3可作为缓和的磺化剂和硫酸化剂使用。与POCl3、COCl2、SOCl2等形成的加合物可在电子密度高的芳香环上引入CHO基（Vilsmeier反应）。P2O5在室温下不溶于N,N-二甲基甲酰胺 ，但在40℃以上形成稳定的络合物后，在室温即能溶解，而不发生沉淀。在金属钠存在下加热时发生激烈反应并放出氢气。与三乙基铝在0℃也能发生激烈反应。也能与Grignard试剂反应。与酰氯及酸酐发生反应时生成二甲酰胺的衍生物。
4.属低毒类。动物试验证明，连续投给大量的N,N-二甲基甲酰胺时。对眼、皮肤、黏膜有强烈的刺激作用，其液体或蒸气被吸收后还能引起肝脏障碍。吸入高浓度的蒸气能引起急性反应，主要为严重刺激、全身痉挛、便秘和呕吐等。除有皮肤、黏膜刺激外，尚有呕吐、全身不适、食欲减少、便秘、尿胆素原和尿胆素亦可增加。使用时要求平均蒸气浓度在29.9mg/m3以下，大鼠和小鼠的经口毒性LD50为3000~7000mg/kg。嗅觉阈浓度0.14mg/m3，TJ 36-79规定车间空气中 容许浓度为10mg/m3。
5.稳定性 稳定
6.禁配物 强氧化剂、酰基氯、氯仿、强还原剂、卤素、氯代烃、浓硫酸、发烟硝酸
7.聚合危害 不聚合
存储温度：Store at RT. 表面拉伸：36.42 dyne/cm at 25 °C
