803251

Sulfo-KMUS (N-(κ-maleimidoundecanoyloxy) sulfosuccinimide ester)

• Empirical Formula (Hill Notation): C₁₉H₂₅N₂O₉SNa
• Molecular Weight: 480.46
• MDL number: MFCD01075057
• UNSPSC Code: 12352200
• PubChem Substance ID: 329768793
• NACRES: NA.22

Properties

• form: powder
• mol wt: 480.47
• reaction suitability: reagent type: cross-linking reagent
• storage condition: desiccated
• solubility: water: soluble
• shipped in: ambient
• storage temp.: 2-8°C
• SMILES string: O=C1CC(S(=O)([O-])=O)C(N1OC(CCCCCCCCCCN2C(C=CC2=O)=O)=O)=O.[Na+]
• InChI: 1S/C19H26N2O9S.Na/c22-15-10-11-16(23)20(15)12-8-6-4-2-1-3-5-7-9-18(25)30-21-17(24)13-14(19(21)26)31(27,28)29;/h10-11,14H,1-9,12-13H2,(H,27,28,29);/q;+1/p-1
• InChI key: MKNJJMHQBYVHRS-UHFFFAOYSA-M

Description

General description

Sulfo-KMUS is a heterobifunctional crosslinker with N-hydroxysuccinimide (NHS) ester and maleimide groups that allow covalent conjugation of amine- and sulfhydryl-containing molecules. NHS esters react with primary amines at pH 7-9 to form amide bonds, while maleimides react with sulfhydryl groups at pH 6.5-7.5 to form stable thioether bonds. In aqueous solutions, hydrolytic degradation of the NHS ester is a competing reaction whose rate increases with pH. The maleimide group is more stable than the NHS-ester group but will slowly hydrolyze and also lose its reaction specificity for sulfhydryls at pH values greater than 7.5. For these reasons, conjugation experiments involving this type of heterobifunctional crosslinker are usually performed at pH 7.2-7.5, with the NHS-ester (amine-targeted) reaction being accomplished before or simultaneous with the maleimide (sulfhydryl-targeted) reaction.

Features and Benefits

• Reactive groups: sulfo-NHS ester and maleimide
• Reactive toward: amino and sulfhydryl groups
• Long aliphatic spacer arm compared to Sulfo-GMBS
• Sulfo-NHS ester reacts with primary amines at pH 7-9, forming a stable amide bond
• Maleimide reacts with -SH groups at pH 6.5-7.5, forming a stable thioether bond
• Non-cleavable
• Water-soluble

Caution

This product is sensitive to moisture. The vial is packaged in a resealable bag with a desiccant to reduce exposure to moisture. After cold storage, equilibrate the vial to room temperature before opening to reduce condensation inside the vial. Make fresh solutions. Storage of stock solutions is not recommended. After use, return the vial to the resealable bag. Close the bag and store the product at the recommended temperature.

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315,H319,H335
• pcodes: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3