99%+,白色粉末,规格：100g/500g/1kg  价格：50元/160元/245元，  中文名称乳清酸.,中文同义词乳清酸无水;6-二氧代-4-嘧啶羧酸;6-四氢-2;乳清酸50G;1,2,3,6-四氢-2,6-二氧-4-嘧Chemicalbook啶甲酸;1,2,3,6-四氢-2,6-二氧代-4-嘧啶羧酸;乳清酸,维生素B13;乳清酸,脲嘧啶-4-羧酸英文名称Oroticacid，CAS号65-86-1分子式C5H4N2O4分子量156.1，乳清酸性质熔点≥300°C沸点280.29°C(roughestimate)密度1.6814(roughestimate)折射率1.4800(estimate)储存条件Sealedindry,RoomTemperature溶解度DMSO:32mChemicalbookg/mL(205.00mM;Needultrasonicandwarming)酸度系数(pKa)pK1:1.8(+1);pK2:9.55(0)(25°C)形态CrystallinePowder颜色White水溶解性Slightlysoluble                                  Description 性状

White crystals or crystalline powder

白色结晶或结晶性粉末 Conforms 符合

Identification 鉴别 Infrared absorption 红外 Conforms 符合

Solubility溶解性

Almost insoluble in water, almost

insoluble in 96% ethanol ａnd ether

几乎不溶于水，几乎不溶于 96%的乙

醇和**

Conforms 符合

Assay含量 99.0~101.0% 99.5%

Loss on drying 干燥失重 ≤12.0% 10.2%

Residue on ignition炽灼残渣 ≤0. 10% 0.08%

pH 2.2~3.0 2.7

Chloride氯化物 ≤100ppm ＜100ppm

Individual impurities 单杂 ≤0.1% ＜0.1%

Total impurities 总杂 ≤0.3% ＜0.3%

Heavy metals 重金属(Pb) ≤20ppm ＜20ppm

Lead 铅 ≤1ppm ＜1ppm

Cadmium 镉 ≤0.5ppm ＜0.5ppm

Mercury 汞 ≤0.1ppm ＜0.1ppm

Arsenic 砷 ≤1ppm ＜1ppm