硼酸 规格:99.0% 产地:土耳其/俄罗斯 包装:25kg/袋 价格:6500元/吨
硼酸
Boric acid
Cas号: 10043-35-3
分子式 H3BO3
分子量 61.83
别名
性状 白色结晶性粉末或无色微带珍珠状光泽的磷片或六角三斜结晶。与皮肤接触有滑腻感,无无气味,味微酸苦后带甜。露置空气中无变化。加热至100-105℃时失去一分子水而形成偏硼酸,于104-160℃时长时间加热转变为焦硼酸,更高温度则形成无水物,300ºC时生成硼酸酐(B2O3)。溶于水、酒精、油、醚类及香精油中,水溶液呈弱酸性。硼酸在水中的溶解度随温度升高而增大,并能随水蒸汽挥发;在无机酸中的溶解度要比在水的溶解度小。0.1mol/L水溶液pH为5.1。1g能溶于18ml冷水,4ml沸水,18ml冷醇,6ml沸醇或4ml 油。在水中溶解度能随***、柠檬酸和酒石酸的加入而增加。
熔点:169℃
沸点:300℃
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(H3BO3)Assay,% ≥ 99.5 99.0
澄清度试验Clarity 合格 合格
水不溶物Insoluble matter in water ≤ 0.005 0.02
乙醇溶解度试验Solubility in ethanol 合格 合格
甲醇不挥发物(以***计)Novolatile with methanol,% ≤ 0.05 0.3
氯化物(Cl)Chloride,% ≤ 0.0005 0.002
***盐(SO4)Sulfate,% ≤ 0.002 0.01
磷酸盐(PO4)Phosphate,% ≤ 0.0005 0.003
钙(Ca)Calcium,% ≤ 0.002 0.01
铁(Fe)Iron,% ≤ 0.0005 0.002
砷(As)Arsenic,% ≤ 0.0001 0.0005
铅(Pb)Lead,% ≤ 0.001 0.003
项目 优级纯
(GR)
澄清度试验Clarity 合格
钙(Ca)Calcium ≤0.002%
含量Assay ≥99.8%
甲醇不挥发物Novolatile with methanol ≤0.05%
磷酸盐Phosphate ≤0.0005%
***盐Sulfate ≤0.0005%
氯化物Chloride ≤0.0003%
镁magnesium ≤0.0005%
砷(As)Arsenic ≤0.00001%
水不溶物Insoluble matter in water ≤0.005%
铁(Fe)Iron ≤0.0001%
乙醇溶解试验Solubility in ethanol 合格
重金属Heavy metals ≤0.0005%
ACS级
项目名称Item ACS Grade
含量Assay ≥99.5%
不溶物Insoluble matter ≤0.005%
甲醇不挥发物Novolatile with methanol ≤0.05%
氯化物(Cl)Chloride(Cl) ≤0.001%
磷酸盐(PO4)Phosphate ≤0.001%
***(SO4)Sulfate ≤0.01%
重金属(以Pb计)Heavy metals(as Pb) ≤0.001%
铁(Fe)Iron(Fe) ≤0.001%
钙(Ca)Calcium(Ca) ≤0.005%
品级Grade 分子生物学级
(for molecular biology,≥99.5% (T) )
含量assay ≥99.5% (T)
DNases, none detected
RNases, none detected
insoluble matter, passes filter test
phosphatases, none detected
proteases, none detected
non-volatile substances in MeOH/HCl <0.05%
干燥损失loss on drying ≤0.5% , 20 °C (HV)
pH 3.6-4.4 (25 °C, saturated solution in H2O)
水溶性solubility H2O: soluble1 M, clear, colorless (hot)
氯chloride (Cl-): ≤5 ppm
磷酸根phosphate (PO43-): ≤5 ppm
***根sulfate (SO42-): ≤5 ppm
Al: ≤5 ppm
As: ≤0.5 ppm
Ba: ≤5 ppm
Bi: ≤5 ppm
Ca: ≤10 ppm
Cd: ≤5 ppm
Co: ≤5 ppm
Cr: ≤5 ppm
Cu: ≤5 ppm
Fe: ≤5 ppm
K: ≤50 ppm
Li: ≤5 ppm
Mg: ≤5 ppm
Mn: ≤5 ppm
Mo: ≤5 ppm
Na: ≤50 ppm
Ni: ≤5 ppm
Pb: ≤5 ppm
Sr: ≤5 ppm
Zn: ≤5 ppm
λ 1 M in H2O
UV absorption
λ: 260 nm A: ≤0.015
λ: 280 nm A: ≤0.010
品级Grade 电泳级
(for electrophoresis, ≥99.5%)
外观Appearance 白色至类白色粉末
水溶解试验solubility in water Colorless Clear ,1 g plus 25 ml, H2O
甲醇不溶物Insoluble matter in MeOH ≤0.005 %
非挥发物Nonvolatile Matter with MeOH ≤0.05 %
氯Chloride ≤0.001 %
磷酸盐Phosphate (PO4) ≤0.001 %
***盐Sulfate (SO4) ≤0.01 %
钙Calcium (Ca) ≤0.005 %
重金属Heavy Metals (as Lead) ≤0.001 %
铁Iron (Fe) ≤0.001 %
含量Assay(% H3BO3) ≥99.5 %
电泳实验electrophoresis test pass
品级Grade 细胞培养与植物细胞培养级
(for cell culture and plant cell culture , ≥99.5%)
外观Appearance 白色粉末
水溶解试验solubility in water Clear Colorless,40 mg/ml, H2O
纯度Purity ≥99.5 % (Titration by NaOH)
植物细胞培养测试Plant Cell Culture Test Pass
细胞培养测试Cell Culture Test Pass
99.998% metals basis:
外观Appearance 白色粉末
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.998% Based On Trace Metals Analysis
ICP Assay Confirms Boron *ponent
总金属杂质Total metallic impurities 30ppm by ICP Atomic emission
99.99% metals basis:
外观Appearance White Powder
X-射线衍射X-Ray Diffraction Conforms to Structure
纯度Purity ≥99.99% Based on Trace Metals Impurities
纯度Purity (Titration by NAOH) 99.0 - 101.0 %
痕量金属杂质total metallic impurities ≤100ppm by ICP Atomic emission
贮存 密封干燥保存。
用途 配制缓冲液及各种硼酸盐,单倍体育种中配制各种培养基。
联合国编号
Risk: R60 -
Safety : S45- S53-
Hazard : T -