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105832-38-0 - 2-Succinimido-1,1,3,3-tetramethyluronium tetrafluoroborate, 98% - TSTU - L13538 - Alfa Aesar

L13538 2-Succinimido-1,1,3,3-tetramethyluronium tetrafluoroborate, 98%

CAS Number

Size Price ($) Quantity Availability
5g 80.34
25g 311.06
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2-Succinimido-1,1,3,3-tetramethyluronium tetrafluoroborate, 98%


Chemical Properties

Formula Weight
Melting point
Moisture Sensitive
Soluble in acetonitrile, DMF, chloroform, dichlorormethane and acetonitrile.


2-Succinimido-1,1,3,3-tetramethyluronium tetrafluoroborate (TSTU) acts as an efficient coupling agent through rapid activation of carboxylic acids to form N-succinimidyl active esters, which react with primary amines to form carboxamides. It is effective even in the presence of water. TSTU is selective towards amines in the presence of alcoholic group. It is employed as a coupling regent in the synthesis of peptides. With amine-protected alpha-amino acids, it brings about coupling without significant epimerization. It is useful for linking of sensor molecules with amino groups to amino-functionalized AFM (atomic force microscope) tips.


Moisture sensitive, Incompatible with strong oxidizing agents.

Literature References

Yang, Q.; Wang, H.; Lan, X.; Cheng, B.; Chen, S.; Shi, H.; Xiao, H.; Ma, Y. Reflection-mode micro-spherical fiber-optic probes for in vitro real-time and single-cell level pH sensing. Sens. Actuators B 2015, 207, 571-580.

Yang, Q.; Wang, H.; Chen, S.; Lan, X.; Xiao, H.; Shi, H.; Ma, Y. Fiber-Optic-Based Micro-Probe Using Hexagonal 1-in-6 Fiber Configuration for Intracellular Single-Cell pH Measurement. Anal. Chem. 2015, 87 (14), 7171-7179.

GHS Hazard and Precautionary Statements

Hazard Statements: H301-H315-H319-H335

Toxic if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P280-P301+P310-P305+P351+P338-P304+P340-P362-P312-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Harmonized Tariff Code


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