Synonym(s): 2-[(2-Hydroxy-1,1-bis(hydroxymethyl)ethyl)amino]ethanesulfonic acid, N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid, TES free acid, OmniPur® TES

Description

TES (2-[(2-Hydroxy-1,1-bis(hydroxymethyl)ethyl)amino]ethanesulfonic acid) is a high-purity biochemical-grade buffering reagent supplied as a white crystalline powder. Its molecular formula is C₆H₁₅NO₆S, with a molecular weight of 229.25 and CAS number 7365‑44‑8. TES dissolves readily in water to form a clear, colorless solution, making it ideal for preparing stable, pH-controlled buffers in biochemical, molecular biology, and cell biology experiments.

Specifications

Item	Value
Chemical Name	N[Tris(Hydroxymethyl)Methyl]-2-Aminoethanesulfonic Acid
Appearance	White Crystalline Powder
CAS No.	7365-44-8
Molecular Formula	C6H15NO6S
Molecular Weight	229.25
Grade	Biochemical Grade
Purity	≥99.0%
Moisture	≤1.0%
Water Solubility	Colorless, Clear, Transparent
pH	3.5–5.0
Infrared Spectrum	Complies with Specifications
Ignition Residue	≤0.1%
A260 (in 1M Water)	≤0.050
A280 (in 1M Water)	≤0.040
Heavy Metals	≤5 ppm

Features

High Purity: ≥99.0% biochemical grade ensures minimal impurities for accurate experimental results.
Effective pH Buffering: Provides stable buffering in the pH range of 7.2–7.8.
Excellent Solubility: Forms clear, transparent solutions suitable for sensitive assays.
Low Optical Absorbance: A260 and A280 values are controlled, minimizing interference in protein and nucleic acid measurements.
Low Metal Content: Heavy metals ≤5 ppm, suitable for biochemical and molecular biology applications.

Applications

Preparation of biochemical buffers for enzyme assays, protein chemistry, and molecular biology workflows.
Cell culture media formulation requiring stable physiological pH.
Molecular biology experiments where low optical absorbance and chemical purity are critical.
General laboratory buffer systems ensuring reproducible pH control for research experiments.

Safety Disclaimer

This product is intended for laboratory research use only. Not for drug, human, or veterinary use. Review the Safety Data Sheet (SDS) provided by BioFargo for detailed handling, storage, hazard, and disposal information. Use appropriate personal protective equipment (PPE) including gloves, lab coat, and eye protection when handling. Dispose of waste and residual buffer in accordance with local, state, and federal regulations. Ensure proper ventilation if preparing large volumes or heating solutions.

Documents

MSDS

TES 99% Biochemical Grade