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N,N,N',N'-Tetramethyl-S-(1-oxido-2-pyridyl)thiouronium Tetrafluoroborate
(CAS RN:255825-38-8 Product Number:T3569)


N,N,N',N'-Tetramethyl-S-(1-oxido-2-pyridyl)thiouronium Tetrafluoroborate
Synonym TOTT

General Information

Product Number T3569

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Purity/Analysis Method >98.0%(HPLC)
Storage Temperature -20°C
M.F. / M.W. C10H16BF4N3OS=313.12
CAS RN 255825-38-8
Related CAS RN
MDL Number MFCD05664718
  • Product Details
  • Safety & Regulations
  • Reference & Application


Purity(HPLC) min. 98.0 area%
Purity(with Total Nitrogen) min. 96.0 %


Reaxys-RN 8455461
PubChem SID 354335176


Signal Word Warning
Hazard Statements
  • H302
  • :Harmful if swallowed.
  • H315
  • :Causes skin irritation.
  • H319
  • :Causes serious eye irritation.
Precautionary Statements
  • P264
  • :Wash hands and face thoroughly after handling.
  • P270
  • :Do not eat, drink or smoke when using this product.
  • P280
  • :Wear protective gloves, eye protection.
  • P301+P312+P330
  • :If swallowed: Call a poison center or doctor if you feel unwell. Rinse mouth.
  • P302+P352+P332+P313+P362+P364
  • :If on skin: Wash with plenty of soap and water. If skin irritation occurs: Get medical advice or attention. Take off contaminated clothing and wash it before reuse.
  • P305+P351+P338+P337+P313
  • :If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice or attention.
  • P501
  • :Dispose of contents and container in accordance with local, regional, national regulations (e.g. US: 40 CFR Part 261, EU:91/156/EEC, JP: Waste Disposal and Cleaning Act, etc.).

Transport Information

HS Number 2933.39.6190


Condensing Agent


Experimental procedure:
A solution of the N-protected amino acid (1 mmol), the amino acid ester hydrochloride (1 mmol), triethylamine (0.28 mL, 2 mmol), and TOTT (1 mmol) in MeCN (10 mL) is stirred at room temperature until disappearance of the free esterified amino acid. Saturated NaCl is added, and the mixture is extracted with AcOEt. The organic layers are washed with 2 mol/L HCl, saturated NaHCO3, and water. The organics are dried (Na2SO4), filtered, and evaporated affording the corresponding peptides.


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