Empirical Formula (Hill Notation): C₇H₁₅NO₄S
Molecular Weight: 209.3
Cas Number: 001132-61-2

MOPS (3-(N-morpholino)propanesulfonic acid, 4-Morpholino Propanesulfonic Acid) is a buffer introduced by Good et al. in the 1960s. It is a structural analog to MES and it’s chemical structure contains a morpholine ring. With a pKa of 7.20, MOPS is an excellent buffer for many biological systems at near-neutral pH. MOPS has inert properties and is capable of buffering within a pH range of 6.5 – 7.9 in solutions. MOPS does not interact with any metal ions, and with it’s significant metal-buffer stability it is especially non-reactive with cobalt (Co), copper (Cu), manganese (Mn), nickel (Ni) and zinc (Zn).

MOPS is frequently used as a buffering agent in biology and biochemistry. It has been tested and recommended for polyacrylamide gel electrophoresis. Usage above a 20 mM concentration in mammalian cell culture work is not recommended. Appearance - White crystalline powder Assay (Titration, Dry Base) - ≥99.0% Water Content by KF - ≤1% Infrared - Complies Solubility 1M water - Clear colourless solution pH 1% Di H2O - 3.6 - 4.4 (25°C) A280, 1M water - ≤0.10 A260, 1M water - ≤0.15

Store dry at room temperature

Soluble in water