13/04/2023
This article is about the biochemical buffering agent. For information about other types of mops, see Mops.
MOPS
Mops is.svg
Names
Preferred IUPAC name
3-(Morpholin-4-yl)propane-1-sulfonic acid
Other names
3-(N-Morpholino)propanesulfonic acid,
3-Morpholinopropanesulfonic acid,
3-N-Morpholino propansulfonic acid,
4-Morpholinepropanesulfonic acid
Identifiers
CAS Number
1132-61-2 check
3D model (JSmol)
Interactive image
ChemSpider
63972 ☒
ECHA InfoCard 100.013.162 Edit this at Wikidata
PubChem CID
70807
2723950
UNII
273BP63NV3 check
CompTox Dashboard (EPA)
DTXSID4044371 Edit this at Wikidata
InChI
SMILES
Properties
Chemical formula C7H15NO4S
Molar mass 209.26 g·mol−1
Hazards
GHS labelling:
Pictograms GHS07: Exclamation mark
Signal word Warning
Hazard statements H315, H319, H335
Precautionary statements P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Safety data sheet (SDS) MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
MOPS (3-(N-morpholino)propanesulfonic acid) is a buffer introduced in the 1960s, one of the twenty Good's buffers. It is a structural analog to MES,[1] and like MES, its structure contains a morpholine ring. HEPES is a similar pH buffering compound that contains a piperazine ring. With a pKa of 7.20, MOPS is an excellent buffer for many biological systems at near-neutral pH.
Applications
MOPS is frequently used as a buffering agent in biology and biochemistry. It has been tested and recommended for polyacrylamide gel electrophoresis.[2] Usage above 20 mM in mammalian cell culture work is not recommended.[3] MOPS buffer solutions become discolored (yellow) over time, but reportedly slight discoloration does not significantly affect the buffering characteristics.[4]
See also
CAPS
HEPPS
Tris
Common buffer compounds used in biology
References
Good, Norman E.; Winget, G. Douglas; Winter, Wilhelmina; Connolly, Thomas N.; Izawa, Seikichi; Singh, Raizada M. M. (1966). "Hydrogen Ion Buffers for Biological Research". Biochemistry. 5 (2): 467–77. doi:10.1021/bi00866a011. PMID 5942950.
Thomas, J; Hodes, ME (1981). "A new discontinuous buffer system for the electrophoresis of cationic proteins at near-neutral pH". Analytical Biochemistry. 118 (1): 194–6. doi:10.1016/0003-2697(81)90178-0. PMID 6278979.
Eagle, H. (1971). "Buffer Combinations for Mammalian Cell Culture". Science. 174 (4008): 500–3. Bibcode:1971Sci...174..500E. doi:10.1126/science.174.4008.500. PMID 5110427. S2CID 29876583.
https://bostonbioproducts.com/products/mops-buffer-1-m-ph-74-bbm-74. {{cite web}}: Missing or empty |title= (help)
External links
Sigma Aldrich Buffer Calculator - Useful tool to calculate weight, volume, or concentration from molecular weight.
Recipe for MOPS buffer on OpenWetWare
