SMPH (succinimidyl-6-((b-maleimidopropionamido)hexanoate) 803626-50MG

Empirical Formula (Hill Notation):	C17H21N3O7
Molecular Weight:	379.36
MDL number:	MFCD01863460
PubChem Substance ID:	329768822

SMPH 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 the 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: NHS ester and maleimide
• Reactive towards: amino and sulfhydryl groups
• Slightly longer and more soluble than SMPB
• 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-insoluble (dissolve first in DMF or DMSO)

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.

Quality Level	100,
assay	≥90%
form	powder
mol wt	379.36
reaction suitability	reagent type: cross-linking reagent
storage condition	desiccated
solubility	DMSO or DMF: soluble
shipped in	ambient
storage temp.	2-8°C
SMILES string	O=C(CCCCCNC(CCN1C(C=CC1=O)=O)=O)ON2C(CCC2=O)=O
InChI	1S/C17H21N3O7/c21-12(9-11-19-13(22)5-6-14(19)23)18-10-3-1-2-4-17(26)27-20-15(24)7-8-16(20)25/h5-6H,1-4,7-11H2,(H,18,21)
InChI key	WCMOHMXWOOBVMZ-UHFFFAOYSA-N

pictograms	GHS07
signalword	Warning
hcodes	H315 - H319 - H335
pcodes	P302 + P352 - P305 + P351 + P338
Target Organs	Respiratory system
RIDADR	NONH for all modes of transport
WGK Germany	WGK 3
Flash Point F	Not applicable
Flash Point C	Not applicable