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| 性状 | 在温热、干燥空气中风化，可溶于水及乙醇。无气味。150-160℃升华。在高热干燥空气中能风化。1g溶于7ml水、2ml沸水、2.5ml乙醇、1.8ml沸乙醇、100ml乙醚、5.5ml甘油，不溶于苯、氯仿和石油醚。0.1mol/L溶液的pH值为1.3。低毒，半数致死量（兔，经皮）2000mg/kg。 | ||
| 备注: | 以上描述，仅作参考，并不表示您收到的产品，与此项描述完全相符，产品的出厂标准，请参见质量标准。 | ||
| 质量标准 | |||
| GB/T 9855-88项目Item 优级纯 分析纯 化学纯(GR) (AR)(CP)含量(C2H2O4·2H2O)Assay,%≥99.8 99.5 99.5澄清度试验Clarity 合格 合格 合格水不溶物Insoluble matter in water,% ≤0.0020.0050.01灼烧残渣（以硫酸盐计）Ignition residue,%≤0.01 0.02 0.05氯化钠(Cl)Chloride,%≤0.0005 0.0020.005硫酸盐(SO4)Sulfate,%≤0.0010.0020.005总氮量(N)Total nitrogen,% ≤0.0010.0020.005钙(Ca)Calcium,% ≤0.0010.0030.005铁(Fe)Iron,%≤0.0002 0.0005 0.002重金属(以Pb计)Heavy metals,%≤0.0002 0.0004 0.001易碳化物质Readily carboniz-able substance合格 合格 合格ACS级项目名称ItemACS Grade含量(H2C2O4·2H2O)Assay99.5-102.5%易炭化物质Substances darkened by hot sulfuric acid Passes test水不溶物Insoluble matter ≤0.005%灼烧残渣Residue after ignition ≤0.01%氯化物(Cl)Chloride(Cl) ≤0.002%硫酸盐(SO4)Sulfate ≤0.005%钙(Ca)Calcium(Ca)≤0.001%氮化合物(以N计)Nitrogen compounds(as N)≤0.001%重金属(以Pb计)Heavy metals(as Pb)≤5ppm铁(Fe)Iron(Fe) ≤2ppm99.998% metals basis:外观AppearanceWhite PowderX-射线衍射分析X-Ray Diffraction Conforms to Structure红外光谱鉴别Infrared spectrometry Conforms to Structure纯度Purity≥99.998% Based on Trace Metals Impurities of ICP痕量金属分析total metallic impurities ≤20ppm by ICP Atomic emission99.99% metals basis:外观AppearanceWhite PowderX-射线衍射分析X-Ray Diffraction Conforms to Structure红外光谱鉴别Infrared spectrometry Conforms to Structure纯度Purity≥99.99% Based on Trace Metals Impurities of ICP痕量金属分析total metallic impurities ≤100ppm by ICP Atomic emission≥99.9999% (metals basis)：外观Appearance白色粉末或结晶纯度Purity≥99.9999% Based On Trace Metals Analysis总氮total nitrogen≤10 ppm熔点mp104-106 °Canion traces by氯chloride (Cl-): ≤5000 ppb磷酸根phosphate (PO43-):≤500 ppb硫酸根sulfate (SO42-):≤2000 ppbcation tracesAg: ≤0.01 ppmAl: ≤0.02 ppmAs: ≤0.01 ppmAu: ≤0.001 ppmBa: ≤0.1 ppmBe: ≤0.001 ppmBi: ≤0.001 ppmCa: ≤0.1 ppmCd: ≤0.05 ppmCe: ≤0.005 ppmCo: ≤0.005 ppmCr: ≤0.01 ppmCs: ≤0.01 ppmCu: ≤0.005 ppmDy: ≤0.005 ppmEr: ≤0.005 ppmEu: ≤0.005 ppmFe: ≤0.5 ppmGa: ≤0.001 ppmGd: ≤0.005 ppmGe: ≤0.005 ppmHf: ≤0.005 ppmHg: ≤0.005 ppmHo: ≤0.005 ppmIn: ≤0.001 ppmIr: ≤0.005 ppmK:≤0.2 ppmLa: ≤0.005 ppmLi: ≤0.005 ppmLu: ≤0.005 ppmMg: ≤0.02 ppmMn: ≤0.005 ppmMo: ≤0.005 ppmNa: ≤0.1 ppmNb: ≤0.005 ppmNd: ≤0.005 ppmNi: ≤0.01 ppmOs: ≤0.01 ppmPb: ≤0.01 ppmPd: ≤0.01 ppmPr: ≤0.005 ppmPt: ≤0.05 ppmRb: ≤0.01 ppmRe: ≤0.005 ppmRh: ≤0.005 ppmRu: ≤0.005 ppmSb: ≤0.001 ppmSc: ≤0.05 ppmSe: ≤0.01 ppmSm: ≤0.005 ppmSn: ≤0.005 ppmSr: ≤0.1 ppmTa: ≤0.01 ppmTb: ≤0.005 ppmTe: ≤0.005 ppmTh: ≤0.005 ppmTi: ≤0.02 ppmTl: ≤0.001 ppmTm: ≤0.005 ppmU:≤0.001 ppmV:≤0.01 ppmW:≤0.005 ppmY:≤0.005 ppmYb: ≤0.005 ppmZn: ≤0.02 ppmZr: ≤0.1 ppm | |||
| 贮存 | 密封保存 | ||
| 用途 | 络合剂。沉淀剂。还原剂。掩蔽络合物的形成剂，校准高锰酸钾及硫酸铈溶液的标准溶液，显微微晶分析检验钠和其他元素。分析中用以检定和测定铍、钙、铬、金、锰、锶、钍等金属离子。沉淀钙、镁、钍和稀土元素。漂白剂。助染剂。 | ||
