12754 柠檬酸 AR 500g 29
12755 柠檬酸 GR 500g 50
12756 柠檬酸 cp 500g 20
12757 柠檬酸 BR 500g 38
12758 柠檬酸 99.995% metals basis 500g 996
12759 柠檬酸 GCS 5g 58
12760 柠檬酸 ≥99.9998% metals basis 5g 88
无色透明斜方形结晶或白色颗粒，无气味，味酸，在干燥空气中或加热至40-50℃成无水物，在潮湿空气中微有潮解性，75℃时变软，100℃时熔融，易溶于水，能溶于醇 密度：1.54 熔点: 135-152℃ 闪点: 173.9℃
GB/T 9855-88 项目Item 优级纯 分析纯 化学纯 (GR) (AR) (CP) 含量(C 6 H 8 O 7 ·H 2 O)Assay,% ≥ 99.8 99.5 99.0 澄清度试验Clarity 合格 合格 合格 水不溶物Insoluble matter in water,% ≤ 0.002 0.005 0.01 灼烧残渣(以硫酸盐计)Ignition residue,% ≤ 0.01 0.02 0.07 氯化物(Cl)Chloride,% ≤ 0.0005 0.0005 0.005 硫酸盐(SO 4 )Sulfate,% ≤ 0.002 0.005 0.02 磷酸盐(PO 4 )Phosphate,% ≤ 0.001 0.001 0.005 草酸盐(C 2 O 4 )Oxalate ≤ 0.05 0.05 -- 钙(Ca)Calcium,% ≤ 0.002 0.005 0.02 铁(Fe)Iron,% ≤ 0.0003 0.0005 0.001 铜(Cu)Copper,% ≤ 0.0005 0.0005 -- 铅(Pb)Lead,% ≤ 0.0005 0.0005 0.001 易碳化物质Readily earbonizable substances 合格 合格 -- 项目 ACS级 (ACS) 含量Assay (C6H8O7?H2O) 99.0-102.0% 不溶物Insoluble Matter ≤ 0.005% 灼烧残渣Residue after Ignition ≤ 0.02% 氯Chloride (Cl) ≤ 0.001% 草酸盐试验Oxalate (C2O4) To pass test (limit about 0.05%) 磷酸盐Phosphate (PO4) ≤0.001% 硫酸盐Sulfur Compounds (as SO4) ≤0.002% 铁Iron (Fe) ≤3 ppm 铅Lead (Pb) ≤2 ppm 易碳化物质Substances Carbonizable by Hot Sulfuric Acid (Tartrates, etc.) To pass test 品级Grade 药典级 (Ph. Eur., BP, USP, E330) 含量assay 99.5-100.5% (based on anhydrous substance) 红外光谱鉴别Infrared spectrometry Conforms residual solvents, complies heavy metals (as Pb) ≤0.0005% water 7.5-8.8% (Karl Fischer) ign. residue ≤0.05% (as SO4) pKa (1) 3.13, (2) 4.76, (3) 6.4 痕量阴离子anion traces by ICP Atomic emission and AAS chloride (Cl-): ≤50 ppm oxalate (as oxalic acid): ≤100 ppm sulfate (SO42-): ≤100 ppm 痕量阳离子cation traces by ICP Atomic emission Al: ≤0.2 ppm As: ≤1 ppm Ca: ≤200 ppm Cu: ≤10 ppm Fe: ≤10 ppm Hg: ≤1 ppm Pb: ≤1 ppm Zn: ≤10 ppm suitability complies for appearance of solution complies for reaction against H2SO4 99.9998% metals basis： 含量assay ≥99.5% (T) 纯度Purity ≥99.9998% metals basis total impurities total nitrogen (N) ≤5 ppm acetate ≤5000 ppb formia te ≤5000 ppb glycolate ≤5000 ppb pKa (1) 3.13, (2) 4.76, (3) 6.4 anion traces bromide (Br-): ≤2000 ppb chloride (Cl-): ≤10000 ppb fluoride (F-): ≥2000 ppb iodide (I-): ≤2000 ppb nitrate (NO3-): ≤10000 ppb nitrite (NO2-): ≤2000 ppb oxalate (C2O42-): ≤5000 ppb phosphate (PO43-): ≤2000 ppb sulfate (SO42-): ≤10000 ppb tartrate (C4H4O62-): ≤0.2% cation traces Ag: ≤0.01 ppm Al: ≤0.05 ppm As: ≤0.01 ppm Au: ≤0.01 ppm Ba: ≤0.05 ppm Be: ≤0.01 ppm Bi: ≤0.01 ppm Ca: ≤0.1 ppm Cd: ≤0.01 ppm Ce: ≤0.01 ppm Co: ≤0.01 ppm Cr: ≤0.05 ppm Cs: ≤0.01 ppm Cu: ≤0.01 ppm Dy: ≤0.01 ppm Er: ≤0.01 ppm Eu: ≤0.01 ppm Fe: ≤0.1 ppm Ga: ≤0.01 ppm Gd: ≤0.01 ppm Ge: ≤0.01 ppm Hf: ≤0.01 ppm Hg: ≤0.005 ppm Ho: ≤0.01 ppm In: ≤0.01 ppm Ir: ≤0.01 ppm K: ≤0.1 ppm La: ≤0.01 ppm Li: ≤0.01 ppm Lu: ≤0.01 ppm Mg: ≤0.05 ppm Mn: ≤0.01 ppm Mo: ≤0.01 ppm Na: ≤2 ppm Nb: ≤0.01 ppm Nd: ≤0.01 ppm Ni: ≤0.01 ppm Os: ≤0.01 ppm Pb: ≤0.01 ppm Pd: ≤0.01 ppm Pr: ≤0.01 ppm Pt: ≤0.01 ppm Rb: ≤0.01 ppm Re: ≤0.01 ppm Rh: ≤0.01 ppm Ru: ≤0.01 ppm Sb: ≤0.01 ppm Sc: ≤0.05 ppm Se: ≤0.05 ppm Sm: ≤0.01 ppm Sn: ≤0.01 ppm Sr: ≤0.01 ppm Ta: ≤0.01 ppm Tb: ≤0.01 ppm Te: ≤0.01 ppm Th: ≤0.01 ppm Ti: ≤0.05 ppm Tl: ≤0.01 ppm Tm: ≤0.01 ppm U: ≤0.01 ppm V: ≤0.01 ppm W: ≤0.01 ppm Y: ≤0.01 ppm Yb: ≤0.01 ppm Zn: ≤0.01 ppm Zr: ≤0.01 ppm 99.995% metals basis: 外观Appearance colorless crystal 红外光谱Infrared spectrometry Conforms to Structure 纯度Purity ≥99.995% Based on Trace Metals Impurities 滴定含量assay by titation 99.5-100.5% 总痕量金属杂质total metallic impurities ≤50ppm by ICP Atomic emission
危险品标志 F,Xi WGK Germany 1 RTECS号 AL3150000 危险类别码 11-36-66-67-41-36/37/38-37/38 安全说明 9-16-26-37/39-36/37/39-36
主要用作食品的酸味剂，也用于制备医药清凉剂、洗涤剂用添加剂