dipotassium sulfinatosulfonate

• ChemBase编号: 129071
• 分子式: K2O5S2
• 平均质量: 222.3236
• 单一同位素质量: 221.84612846
• SMILES: [K+].[K+].[O-]S(=O)S(=O)(=O)[O-]
• Canonical SMILES: [O-]S(=O)S(=O)(=O)[O-].[K+].[K+]
• InChI: InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
• InChIKey: RWPGFSMJFRPDDP-UHFFFAOYSA-L

名称和登记号

名称

• IUPAC标准名: dipotassium sulfinatosulfonate
• IUPAC传统名: dipotassium metabisulfite
• 别名: 偏硫代硫酸钾; 偏重亚硫酸钾; 焦亚硫酸钾; Potassium pyrosulfite; Dipotassium disulfite; Potassium metabisulfite; Potassium metabisulfite; Potassium disulfite; Potassium disulfite; Potassium metabisulfite

登记号

• CAS号: 16731-55-8
• EC号: 240-795-3
• MDL号: MFCD00167605
• 默克索引号: 147645
• PubChem SID: 24881901; 162223371; 24898332; 24847706; 24858904
• PubChem CID: 28019
• Chemspider ID: 26061
• 美国药典/FDA物质标识码: 65OE787Q7W
• 维基百科标题: Potassium_metabisulfite

理论计算性质

• Acid pKa: -2.7217357
• 质子受体: 5
• 质子供体: 0
• LogD (pH = 5.5): -6.1587806
• LogD (pH = 7.4): -6.185216
• Log P: -1.5739199
• 摩尔折射率: 18.7261 cm^3
• 极化性: 9.72111 Å^3
• 极化表面积: 97.33 Å^2
• 可自由旋转的化学键: 1
• 里宾斯基五规则: true

分子性质

理化性质

• 溶解度: 450 g/l (20 °C) in water; H2O: soluble0.1 M at 20 °C, clear, colorless; insoluble in ethanol
• 外观: powder; Powder; White crystalline powder
• 熔点: 190 °C decomp.; 190°C dec.
• 密度: 2.34 g/cm^3 (solid)
• 气味: pungent (sulfur dioxide)
• pH值: 2.5-4.5 (25 °C, 0.1 M in H2O); 3.5-4.5 (20 °C, 5%)

安全信息

• 保存注意事项: Air Sensitive
• RTECS编号: TT4920000
• 欧盟危险性物质标志: 刺激性(Irritant) (Xi)
• 德国WGK号: 1
• 危险公开号: 31-36/37/38; R36 R37 R38
• 安全公开号: 26-36; 26-37
• TSCA收录: 是
• 欧盟危险品索引: Not listed
• GHS危险品标识: GHS07
• GHS警示词: Warning
• 主要危害: Irritant, asthma risk
• NFPA704:
  

  0

  1

  0
• GHS危险声明: H315-H319-H335
• GHS警示性声明: P261-P305 + P351 + P338; P261-P305+P351+P338-P302+P352-P321-P405-P501A
• 个人保护装置: dust mask type N95 (US), Eyeshields, Gloves
• 欧盟补充危害声明: Contact with acids liberates toxic gas.

产品相关信息

• 纯度: ≥96% (iodometric); ≥96% (RT); ≥97.0% (RT); ≥98%; 95.0-101.0% (iodometric); 95+%
• 级别: puriss.; puriss. p.a.; purum p.a.
• 适用性: in accordance for appearance of solution
• 杂质: ≤0.001% heavy metals (as Pb); ≤0.08% thiosulfate (S2O3); 51.8-57.6% sulfur dioxide; insoluble matter, passes filter test; organic volatile impurities, complies (GC); residual solvents, in accordance
• 痕量阳离子: Al: ≤5 mg/kg; As: ≤0.1 mg/kg; As: ≤1 mg/kg; As: ≤2 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Ca: ≤50 mg/kg; Cd: ≤5 mg/kg; Cd: ≤50 mg/kg; Co: ≤5 mg/kg; Co: ≤50 mg/kg; Cr: ≤5 mg/kg; Cu: ≤10 mg/kg; Cu: ≤20 mg/kg; Cu: ≤5 mg/kg; Cu: ≤50 mg/kg; Fe: ≤10 mg/kg; Fe: ≤5 mg/kg; Fe: ≤50 mg/kg; Hg: ≤1 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤1000 mg/kg; Ni: ≤5 mg/kg; Ni: ≤50 mg/kg; Pb: ≤2 mg/kg; Pb: ≤5 mg/kg; Pb: ≤50 mg/kg; Se: ≤5 mg/kg; Sr: ≤5 mg/kg; Zn: ≤10 mg/kg; Zn: ≤20 mg/kg; Zn: ≤5 mg/kg; Zn: ≤50 mg/kg
• 痕量阴离子: chloride (Cl-): ≤100 mg/kg; chloride (Cl-): ≤50 mg/kg
• 品质说明: meets analytical specification of Ph.Eur., BP, NF, FCC, E224
• 产品线: BioUltra
• abs.: absorption0.1M/308 nm, H2O cut-off
• 线性分子式: K2S2O5

详细说明

Sigma Aldrich - P2522

包装
500 g in poly bottle