69890

MES

BioUltra, ≥99.5% (T)

• Sinonimo/i: Acido 2-(N-Morpholino)etansolfonico, Acido 4-morfolinetansolfonico
• Formula empirica (notazione di Hill): C₆H₁₃NO₄S · xH₂O
• Numero CAS: 1266615-59-1
• Peso molecolare: 195.24 (anhydrous basis)
• Numero MDL: MFCD00149409
• Codice UNSPSC: 12161700
• eCl@ss: 32129211
• ID PubChem: 57652220
• NACRES: NA.25

Proprietà

• Nome Commerciale: BioUltra
• Livello qualitativo: 200
• Saggio: ≥99.5% (T)
• Forma fisica: powder or crystals
• Impurezze: insoluble matter, passes filter test
• Residuo alla calcinazione (900 °C): ≤0.05%
• pH: 2.5-4.0 (25 °C, 0.5 M in H₂O)
• Intervallo di pH utile: 5.5-6.7
• pKa: 6.1
• Solubilità: H₂O: 0.5 M at 20 °C, clear, colorless
• Anioni in tracce: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤100 mg/kg
• Cationi in tracce: Al: ≤5 mg/kg; As: ≤0.1 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤20 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤50 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤50 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Sr: ≤5 mg/kg; Zn: ≤5 mg/kg
• λ: 0.5 M in H₂O
• Assorbanza UV: λ: 260 nm A_max: 0.025; λ: 280 nm A_max: 0.020
• Stringa SMILE: O.OS(=O)(=O)CCN1CCOCC1
• InChI: 1S/C6H13NO4S.H2O/c8-12(9,10)6-3-7-1-4-11-5-2-7;/h1-6H2,(H,8,9,10);1H2; MIIIXQJBDGSIKL-UHFFFAOYSA-N

Descrizione

Descrizione generale

MES is one of the "Good" buffers developed for biological applications. MES is not recommended at pH 7.4; other buffers should be considered. All qualities are tested for trace ions and all can be used for biological and biochemistry applications. This product is used in biochemical and biological techniques where highly purified products are needed.

Nota sulla preparazione

A buffer using MES free acid can be prepared by titrating the free acid with sodium hydroxide to the desired pH (pKa=±1). Alternatively, volumes of equimolar MES free acid and sodium MES can be mixed to attain the desired pH. Standard mixing tables using stock solutions to prepare a buffer of a given pH have been published.

Altre note

Solubility/Stability: MES is soluble in water, giving a clear colourless solution at concentrations of 0.5M or higher. The pH of a solution should be between 2.5 and 5, depending on the concentration. Solutions are stable at 2-8°C for months.
Sterilization: Sterilization should be by filteration through 0.2μM filters. Autoclaving is not recommended by any sulfonic acid buffers. If buffers must be nuclease-free, it is best to treat the water, then add the buffer solids after autoclaving. When MES solutions are autoclaved, they turn yellow (although pH does not change measurably. The identity of the yellow breakdown product is unknown.

Easily compare specifications for MES hydrate products with the MES hydrate specification table.

Biological buffer; useful pH-range 5.8-6.5; Mobile phase component in brain tubulin isolation by amino-activated gel chromatography; Buffer in plant tissue culture.

Informazioni sulla sicurezza

• Codice della classe di stoccaggio: 13 - Non Combustible Solids
• Classe di pericolosità dell'acqua (WGK): WGK 1
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable
• Dispositivi di protezione individuale: Eyeshields, Gloves