性状 白色有光针状结晶性粉未,味酸并有灼烧感。其蒸气显黄绿色,并带辛辣味,对光及热稳定,能溶于水、醇、丙酮和乙酸。易吸收干燥氟化氢、氯化氢、溴化氢和碘化氢生成卤化硒。二氧化硒是一种强氧化剂,可被SO2、H2、NH3、CO、C还原成单质硒。 熔点: 315 °C
溶解度:38.4 g/100mL 水(14°C),1.11%醋酸(13.9°C)、10.16 %甲醇(11.8°C)、6.67 % 93%的乙醇(14°C),4.35 %丙酮ACETONE (15.3°C)。 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 项目Item 分析纯 化学纯 (AR) (CP) 含量Assay,% ≥ 99.0 98.0 灼烧残渣(以硫酸盐计)Ignition residue,% ≤ 0.05 0.2 氯化物(Cl)Chloride,% ≤ 0.003 0.005 硫酸盐及硒酸盐Sulfate and selenate,% ≤ 0.05 0.1 铁(Fe)Iron,% ≤ 0.001 0.002 重金属(以Pb计)Heavy metals,% ≤ 0.001 0.05 水不溶物Insoluble matter in water,% ≤ 0.005 0.01
99.9% metals basis:
外观Appearance White to Off-White Powder or Crystalline Powder 纯度Purity ≥99.9% Based On Trace Metals Analysis ICP: Confirms Selenium Component Confirmed Gravimetric Analysis (% Se) 70.0 - 73.0 % After Reduction With Sulfite 总痕量金属杂质Total Metallic Impuritie ≤1000ppm by ICP Atomic emission
99.99% metals basis:
外观Appearance 白色粉末或结晶 纯度Purity ≥99.99% Based On Trace Metals Analysis Se 70.1 - 72.2 % (Gravimetric Analysis After Reduction With Sulfite) ICP: Confirms Selenium Component Confirmed 总痕量金属杂质Total Metallic Impuritie ≤100ppm by ICP Atomic emission
99.999% metals basis:
外观Appearance 白色粉末或结晶 纯度Purity ≥99.999% Based On Trace Metals Analysis Se 70.1 - 72.2 % (Gravimetric Analysis After Reduction With Sulfite) ICP: Confirms Selenium Component Confirmed 总痕量金属杂质Total Metallic Impuritie ≤20ppm by ICP Atomic emission 贮存 易吸潮,密封保存。 用途 制造其他硒化合物,生物碱检定,氧化剂。与氨反应生成氮和硒,在醇溶液中则生成亚硒酸乙基铵[NH4(C2H5)SeO3],与肼生成氮和黑色无定形硒,与盐酸羟胺生成氮和红棕色无定形硒,与硝酸生成亚硒酸。 联合国编号 3283 Risk: R23/24/25 R33 R50/53 Safety : S20/21 S28A S45 S60 S61 Hazard : T N
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