dipotassium [(oxidodioxochromio)oxy]chromiumoylolate

• ChemBase编号: 104538
• 分子式: Cr2K2O7
• 平均质量: 294.1846
• 单一同位素质量: 293.7728307
• SMILES: [K+].[K+].[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-]
• Canonical SMILES: [O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-].[K+].[K+]
• InChI: InChI=1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1
• InChIKey: KMUONIBRACKNSN-UHFFFAOYSA-N

名称和登记号

名称

• IUPAC标准名: dipotassium [(oxidodioxochromio)oxy]chromiumoylolate
• IUPAC传统名: dipotassium chromate; dipotassium ion chromate
• 别名: 重铬酸钾, 0.25N标准溶液; 重铬酸钾, 0.1N 标准溶液; 重铬酸钾, 0.025N标准溶液; 重铬酸钾, 可稀释标准标定液, 最终浓度 0.1N; 重铬酸钾, ACS; 红矾钾; 重铬酸钾; 重铬酸钾 溶液; Chromium standard solution; Potassium bichromate; Potassium dichromate, 0.25N Standardized Solution; Potassium dichromate, 0.1N Standardized Solution; Potassium dichromate, 0.025N Standardized Solution; Potassium dichromate, Acculute Standard Volumetric Solution, Final Concentration 0.1N; Potassium dichromate, ACS; Potassium dichromate; POTASSIUM DICHROMATE; Potassium dichromate solution; Potassium dichromate concentrate; Potassium dichromate solution; Chromium standard solution

登记号

• CAS号: 7778-50-9
• EC号: 231-157-5; 231-906-6
• MDL号: MFCD00011367
• 默克索引号: 147627
• PubChem SID: 24871862; 24861393; 24860723; 162093106; 24881808; 24858901; 24898614; 24861760; 24861758; 24866317; 24859156; 24898340; 24852473; 24863781
• PubChem CID: 24502
• CHEMBL: 1374101
• Chemspider ID: 22910
• 维基百科标题: Potassium_dichromate

理论计算性质

• Acid pKa: -2.30103
• 质子受体: 6
• 质子供体: 0
• LogD (pH = 5.5): -8.234395
• LogD (pH = 7.4): -8.2344
• Log P: -3.7068
• 摩尔折射率: 10.0076 cm^3
• 极化性: 11.546313 Å^3
• 极化表面积: 123.63 Å^2
• 可自由旋转的化学键: 2
• 里宾斯基五规则: true

分子性质

理化性质

• 溶解度: 4.9 g/100 mL (0 °C) ; 102 g/100 mL (100 °C) in water; H2O: soluble0.1 M at 20 °C, clear, orange; insoluble in alcohol; Soluble in water
• 外观: crystalline; Crystalline; fine crystals; Liquid; red-orange crystalline solid
• 熔点: 398 °C; 398 °C(lit.); 398 °C; 398°C
• 沸点: 500 °C; 500 °C decomp.
• 闪点: non-flammable
• 密度: 1.000 g/mL at 25 °C; 2.676; 2.676 g/cm^3, solid; 2.676 g/m3
• 折射率: 1.738
• 气味: odorless
• 标准摩尔生成焓 (ΔfH^o298): -2033 kJ/mol
• 标准摩尔熵 (S^o298): 291.2 J K^−1 mol^−1
• pH值: 3.5-5.0 (25 °C, 0.1 M in H2O)

安全信息

• 保存条件: Room Temperature (15-30°C)
• RTECS编号: HX7680000
• 欧盟危险性物质标志: Carc. Cat. 2; Corrosive (C); Dangerous for the environment (N); Harmful (Xn); Highly toxic (T+); Muta. Cat. 2; 环境危害性(Nature polluting) (N); 氧化性(Oxidising) (O); Oxidant (O); Repr. Cat. 2; 有毒(Toxic) (T); 剧毒(Highly toxic) (T+)
• 联合国危险货物编号: 3082; 3086; 3287; 3288; UN3087; UN3287
• 德国WGK号: 3
• 联合国危险货物等级: 5.1; 6.1; 9
• 联合国危险货物包装类别(PG): 1; 3; I; II; III
• 澳大利亚Hazchem: 2W
• 危险公开号: 45-46-20-51/53; 45-46-20-52/53; 45-46-60-61-20-51/53; 45-46-60-61-22-23-36/37/38-42/43-48/20-50/53; 45-46-60-61-22-23-42/43-48/20-51/53; 45-46-60-61-23-42/43-48/20-51/53; 45-46-60-61-42/43-48/20-52/53; 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53; 45-46-60-61-8-22-26-34-37-42/43-48/23-51/53; R:8-21-25-26-37/38-41-43-46-49-50/53; R45, R46, R60, R61, R8, R21, R25, R26, R34, R42/43, R48/23, R50/53
• 安全公开号: 53-23-26-28-36/37/39-45-57; 53-23-26-36/37-45-61; 53-23-36/37-45-61; 53-24-37-45-57; 53-24-37-45-61; 53-45-60-61; 53-45-61; S:14-45-53-60-61; S53, S45, S60, S61
• 欧盟危险货物分类: TO2
• 欧盟危险识别号(EUHIN): 6.1A
• 美国ERG指导号: 141
• TSCA收录: 是
• 欧盟危险品索引: 024-002-00-6
• GHS危险品标识: GHS03; GHS05; GHS06; GHS07; GHS08; GHS09
• GHS警示词: Danger
• NFPA704:
  

  0

  4

  1

  OX
• GHS危险声明: H272-H301-H312-H314-H317-H330-H334-H340-H350-H360FD-H372-H410; H272-H301-H312-H314-H317-H330-H334-H340-H350-H360-H372-H410; H272-H301-H330-H312-H317-H334-H340-H350-H360-H372-H314-H400-H410; H272-H331-H302-H317-H335-H336-H334-H340-H350-H360-H372-H314-H411; H302-H314-H317-H331-H334-H335-H340-H350-H360FD-H373-H410; H302-H314-H317-H332-H334-H335-H340-H350-H360FD-H373-H410; H315-H317-H319-H334-H340-H350-H360FD-H373-H411; H332-H340-H350-H360FD-H411; H334-H340-H350-H360-H315-H319-H317-H373-H333-H412; H334-H340-H350-H360-H317-H373-H318-H315-H332-H303-H411; H340-H350-H360FD-H411; H340-H350-H412
• GHS警示性声明: P201-P220-P260-P273-P280-P284; P201-P261-P273-P280-P305 + P351 + P338-P308 + P313; P201-P261-P273-P280-P305 + P351 + P338-P310; P201-P273-P308 + P313; P221-P210-P303+P361+P353-P305+P351+P338-P405-P501A; P221-P301+P310-P303+P361+P353-P304+P340-P305+P351+P338-P320-P330-P405-P501A; P260-P285-P305+P351+P338-P302+P352-P405-P501A
• 个人保护装置: dust mask type N95 (US), Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P2 (EN 143) respirator cartridges, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter; Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
• RID/ADR: UN 3082 9/PG 3; UN 3086 6.1/PG 1; UN 3287 6.1/PG 3

产品相关信息

• 纯度: ≥98%; ≥99%; ≥99.0%; ≥99.0% (RT); ≥99.5%; ≥99.5% (RT); ≥99.8%; 99%; 99.0% min; 99.95-100.05%; 99.99% trace metals basis
• 浓度: 0.02 M K2Cr2O7; 0.0950-0.1050 N (Exact value stated on label); 1 mg/mL Cr; 1/10 N; 1/25 M K2Cr2O7 (0.24N); 1/6 M K2Cr2O7 (1N); 1/60 M; 1/60 M K2Cr2O7 (0.1N); 1000 ppm Cr
• 级别: ACS reagent; ACS reagent, reag. ISO, reag. Ph. Eur.; for COD determination according to DIN 38409, part 41; JIS special grade; puriss.; puriss. p.a.; purum; purum p.a.; ReagentPlus®; SAJ first grade; technical
• 包装: pkg of 1/60 mol (4.903 g K2Cr2O7)
• 适用性: suitable for atomic absorption spectrometry
• 杂质: <0.005% Phosphorus (P); <0.1% Insoluble matter; ≤0.005% insolubles; ≤0.005% water insolubles; insoluble matter, passes filter test
• 痕量阳离子: Al: <0.0005%; Ca: <0.0005%; Ca: ≤0.003%; Ca: ≤20 mg/kg; Ca: ≤50 mg/kg; Cd: ≤10 mg/kg; Cd: ≤50 mg/kg; Co: ≤20 mg/kg; Co: ≤50 mg/kg; Cu: <0.0005%; Cu: ≤10 mg/kg; Cu: ≤50 mg/kg; Fe: <0.001%; Fe: ≤10 mg/kg; Fe: ≤20 mg/kg; Fe: ≤50 mg/kg; heavy metals (as Pb): ≤5 ppm; Mg: <0.0005%; Mg: ≤10 mg/kg; Mg: ≤5 mg/kg; Mn: ≤10 mg/kg; Mn: ≤5 mg/kg; Na: <0.05%; Na: ≤0.001%; Na: ≤0.02%; Na: ≤100 mg/kg; Na: ≤200 mg/kg; Na: ≤500 mg/kg; Ni: ≤20 mg/kg; Ni: ≤50 mg/kg; Pb: <0.001%; Pb: ≤50 mg/kg; Sr: ≤50 mg/kg; Zn: ≤0.001%; Zn: ≤10 mg/kg; Zn: ≤50 mg/kg
• 痕量阴离子: chloride (Cl-): ≤0.001%; chloride (Cl-): ≤10 mg/kg; chloride (Cl-): ≤200 mg/kg; chloride (Cl-): ≤50 mg/kg; sulfate (SO42-): <0.005%; sulfate (SO42-): ≤0.005%; sulfate (SO42-): ≤200 mg/kg; sulfate (SO42-): ≤50 mg/kg; sulfate (SO42-): ≤500 mg/kg
• 有效期: (limited shelf life, expiry date on the label)
• 干燥失重: ≤0.05% loss on drying; ≤0.05% loss on drying, 105 °C; ≤0.05% loss on drying, 110 °C
• 品质说明: volumetric
• Factor: 1.000 ±0.001
• 产品线: BioUltra
• abs.: absorption0.1M/, H2O no transmittance (UV)
• 线性分子式: K2Cr2O7

详细说明

MP Biomedicals - 02156338

Crystalline

Sigma Aldrich - 483044

包装
10, 50 g in poly bottle

Sigma Aldrich - 35171

General description
请访问 滴定中心 了解更多信息。

Sigma Aldrich - 35169

General description
请访问 滴定中心 了解更多信息。

Sigma Aldrich - P5271

包装
2 kg in poly bottle
25, 500 g in poly bottle
法律信息
ReagentPlus 注册商标 Sigma-Aldrich Co. LLC

Sigma Aldrich - 42019

Analysis Note
精确浓度、有效期、可追踪性以及认证的详细信息请见每个包装内的证书和认证报告。含量和有效期见标签。

Sigma Aldrich - 38100

General description
concentration after dilution to 1L: 1/60mol/L (0.1N); amount of substance 1/60mol (4.903 g K2Cr2O7)
请访问 滴定中心 了解更多信息。

Sigma Aldrich - 207802

包装
100, 500 g in poly bottle

Sigma Aldrich - 24-4475

Suitability
standard

Sigma Aldrich - 34271

General description
请访问 滴定中心 了解更多信息。

Sigma Aldrich - 60190

Other Notes
通过熔融作用进行分解的氧化剂1,2

Sigma Aldrich - P2588

包装
1 kg in poly bottle
250 g in poly bottle

Sigma Aldrich - 319317

General description
请访问 滴定中心 了解更多信息。
包装
2 L in poly bottle
500 mL in poly bottle
塑料瓶包装

Sigma Aldrich - 34631

包装
货号后缀带有 -VP 或 -VOLPAC 表示产品是包装在 5L 或者 10L 的 VOLPAC 容器中。

Sigma Aldrich - 309176

包装
100 g in glass bottle

参考文献

• Can be used catalytically in comblnation with Sodium percarbonate, A16045, as the stoichiometric oxidant under phase transfer conditions, for the oxidation of secondary alcohols to ketones: Synth. Commun., 25, 2349 (1995).
• Optimal conditions have been determined for the oxidation of enamines to ketones in a biphasic ether-water solvent system: Tetrahedron Lett., 36, 2921 (1995).