性状 |
易吸收空气中的水分和二氧化碳。1g溶于0.9ml冷水、0.3ml沸水、7.2ml无水乙醇、4.2ml甲醇,溶于甘油。溶于水、乙醇时或溶液与混和时产生剧热。溶液呈强碱性。有腐蚀性。半数致死量
(小鼠,腹腔)40mg/kg。
gb/t 629-199
项目item 优级纯 分析纯 化学纯
(gr) (ar) (cp)
含量(naoh)assay,% ≥ 97.0 96.0 95.0
碳酸盐(以naco3计)
carbonate,% ≤ 1.0 1.5 3.0
澄清度试验clarity 合格 合格 合格
氯化物(cl)chloride,% ≤ 0.002 0.005 0.01
硫酸盐(so4)sulfate,% ≤ 0.002 0.005 0.02
总氮量(n)total nitrogen,% ≤ 0.0005 0.001 0.002
磷酸盐(po4)phosphate,% ≤ 0.0005 0.001 0.002
硅酸盐(sio3)silicate,% ≤ 0.005 0.01 0.05
镁(mg)magnesium,% ≤ 0.0005 -- --
铝(al)aluminum,% ≤ 0.001 0.002 0.005
钾(k)potassium,% ≤ 0.02 0.05 --
钙(ca)calcium,% ≤ 0.002 0.01 0.05
铁(fe)iron,% ≤ 0.005 0.001 0.002
镍(ni)nickel,% ≤ 0.001 -- --
锌(zn)zinc,% ≤ 0.001 -- --
砷(as)arsenic,% ≤ 0.001 -- --
重金属(以pb计)heavy metals,% ≤ 0.001 0.003 0.003
acs级
项目名称 acs grade
含量(naoh)assay ≥97%
碳酸钠sodium carbonate ≤1.0%
硫酸盐(so4)sulfate ≤0.003%
氯化物(cl)chloride ≤0.005%
氮化合物(以n计)nitrogen compounds ≤0.001%
磷酸盐(po4)phosphate ≤0.001%
重金属(以pb计)heavy metals ≤0.002%
铁(fe)iron(fe) ≤0.001%
镍(ni)nickel ≤0.001%
汞(hg)mercurous ≤0.1ppm
钙(ca)calcium ≤0.005%
镁(mg)magnesium ≤0.002%
钾(k)potassium ≤0.02%
品级grade 药用级
(ph. eur., bp, nf, e524, 98-100.5%, pellets )
含量assay 98-100.5%
总氮total nitrogen (n) ≤0.0005%
重金属heavy metals (as pb) ≤0.002%
碳酸钠na2co3 ≤0.5%
氯离子chloride (cl-): ≤20 ppm
磷酸根phosphate (po43-): ≤10 ppm
硅酸根silicate (as sio2): ≤100 ppm
硫酸根sulfate (so42-): ≤30 ppm
氯al: ≤10 ppm
砷as: ≤2 ppm
钙ca: ≤10 ppm
铁fe: ≤10 ppm
汞hg: ≤1 ppm
钾k: ≤1000 ppm
铅pb: ≤0.5 ppm
品级grade 电子级, 99.99% metals basis
(semiconductor grade, 99.99% metals basis)
外观appearance white pellets
x-射线衍射分析x-ray diffraction conforms to structure
纯度purity ≥99.99% based on trace metals analysis by icp and aa
combined
氢氧化钠naoh(titration by hcl) 95.0 %
碳酸钠na2co3 1.0 %
痕量金属分析total metallic impurities ≤200ppm by icp atomic emission
≥98%, pellets (anhydrous):
外观appearance white pellets
水溶性solubility clear colorless,100 mg/ml, h2o
纯度purity(titration by hcl) ≥ 98 %
碳酸钠杂质impurity(as na2co3) ≤1.0 %
品级grade 荧光专用
(for luminescence, ≥98.0% (t), pellets)
外观appearance pellets
含量assay ≥98.0% (t)
不溶物insoluble matter, passes filter test
总氮total nitrogen (n) ≤0.0003%
二氧化硅silicon dioxide (sio2) ≤0.0005%
碳酸钠sodium carbonate (na2co3) ≤1.0%
水溶性solubility h2o: soluble1 m at 20 °c, clear, colorless
anion traces
chloride (cl-): ≤10 ppm
phosphate (po43-): ≤5 ppm
sulfate (so42-): ≤5 ppm
cation traces
ag: ≤5 ppm
al: ≤5 ppm
as: ≤0.1 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
hg: ≤0.1 ppm
k: ≤200 ppm
li: ≤5 ppm
mg: ≤5 ppm
mn: ≤5 ppm
mo: ≤5 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
uv absorption λ: 280 nm a: ≤0.01
suitability in accordance for luminescence
品级grade acs级,, k ≤0.02%, ≥98.0% (t), 片状
(acs, k ≤0.02%, ≥98.0% (t), pellets)
外观appearance pellets
含量assay ≥98.0% (t)
总氮total nitrogen (n) ≤0.0003%
二氧化硅silicon dioxide (sio2) ≤0.0005%
碳酸钠sodium carbonate (na2co3) ≤1.0%
水溶性solubility h2o: soluble1 m at 20 °c, clear, colorless
anion traces
chloride (cl-): ≤10 ppm
phosphate (po43-): ≤5 ppm
sulfate (so42-): ≤5 ppm
cation traces
ag: ≤5 ppm
al: ≤5 ppm
as: ≤0.1 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
hg: ≤0.1 ppm
k: ≤200 ppm
li: ≤5 ppm
mg: ≤5 ppm
mn: ≤5 ppm
mo: ≤5 ppm
ni: ≤5 ppm
pb: ≤5 ppm
sr: ≤5 ppm
zn: ≤5 ppm |
贮存 |
密封干燥保存。 |
用途 |
广泛应用的基本分析试剂。配制分析用标准碱液。少量二氧化碳和水分的吸收剂。酸的中和。钠盐制造。 |
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