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CF® dye MTS are fast-reacting, highly selective thiol-reactive derivatives for reversible labeling of thiol groups with fluorescent CF® dyes.

Product Attributes

Chemical reactivity (reacts with)


Functional group


Storage Conditions

Store at -10 to -35 °C or below, Protect from light

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Catalog #
1 mg
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Product Description

CF® dyes with a methanethiosulfonate (MTS) group are fast-reacting and highly selective thiol-reactive derivatives that can be used to attach fluorescent CF® dyes to thiol groups. Labeling can be easily reversed using reducing agents like DTT or TCEP.

  • Rapid and highly-selective labeling of thiol groups on target molecules with fluorescent CF® dyes.
  • Labeling is reversible using reducing reagents like TCEP and DTT.
  • Bright, photostable and water-soluble CF® dyes are excellent options for fluorescent labeling.

Superior CF® Dyes
CF® dyes are Biotium’s line of next-generation fluorescent dyes that have improved brightness, photostability and water solubility compared to other commercially available fluorescent dyes.

Learn more about CF® Dyes. For more information download the CF® Dye Brochure.

Product Conjugation Ex/Em Size Catalog No. Purchase
CF®488A MTS CF®488A 490/515 nm 1 mg 92097 Purchase 92097
CF®543 MTS CF®543 541/560 nm 1 mg 92098 Purchase 92098
CF®594 MTS CF®594 593/614 nm 1 mg 92099 Purchase 92099
CF®640R MTS CF®640R 642/662 nm 1 mg 92096 Purchase 92096


Download a list of CF® dye references.


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