品名 | 规格 | 包装 | 单价 | 货期 |
甲氨蝶呤,二水合 | USP | 1g | 858元 | 现货 |
甲氨蝶呤,二水合 | 99% | 5g | 2002元 | 促销 |
甲氨蝶呤,二水合 | 99% | 1g | 686.4元 | 促销 |
甲氨蝶呤,二水合 | 99% | 500mg | 404.8元 | 促销 |
甲氨蝶呤,二水合 | 99% | 250mg | 228.8元 | 促销 |
外观Appearance 黄色至橙色粉末
核磁Proton NMR spectrum Conforms
纯度Purity ≥99.0% (HPLC,面积归一法)
比旋光度Specific rotation [a]20/D +19.0 ~ +24.0 °(C=0.1,1N NaOH)
硫酸盐灰分sulfated ash ≤0.1%
水分Water ≤10.0 %
品级Grade USP级
(EP, USP testing specifications)
鉴别试验Identity Pass by UV (In Acid and Base)
鉴别试验Identity Pass by IR
比旋度Specific Rotation (anhydrous) 19 - 24 °
水分Water (by Karl Fischer) ≤12.0 %
灼烧残渣Residue on ignition (Ash) ≤0.1 %
重金属Heavy Metal ≤50 ppm
相关化合物Related Compounds Pass
相关物质Related Substances Pass
(R)-甲氨蝶呤(R)- Methotrexate ≤3.0 %
含量Assay(Anhydrous basis) 98.0 - 102.0 %
残留溶剂Residual Solvents Meets Requirements
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