N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid

Also known as: TES, TES free acid, 2-[[2-Hydroxy-1,1-bis(hydroxymethyl)ethyl]amino]ethanesulfonic acid, 2-[Tris(hydroxymethyl)methylamino]-1-ethanesulfonic acid, 2-{[1,3-Dihydroxy-2-(hydroxymethyl)propan-2-yl]amino}ethanesulfonic acid, Ethanesulfonic acid, 2-[[2-hydroxy-1,1-bis(hydroxymethyl)ethyl]amino]-, N-[2-Hydroxy-1,1-bis(hydroxymethyl)ethyl]taurine, TES buffer

N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid (CAS 7365-44-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H15NO6S and a molecular weight of 229.25 g/mol. Key properties include a melting point of ~225 °C (dec.) and a density of 1.6±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 7365-44-8
Jingsj CID: J-1054096-5
Molecular Formula: C₆H₁₅NO₆S
Molecular Weight: 229.25 g/mol
Category: Organic Acids
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	~225 °C (dec.)
Density	1.6±0.1 g/cm3
Exact Mass	229.062012
PSA	135.47000
LogP	-2.62
Refractive Index	1.571
Additional Property	SOLUBLE

Activity & Biological Data

Additional Information	[1]. Itagaki A, et al. Tes and HEPES buffers in mammalian cell cultures and viral studies: problem of carbon dioxide requirement. Exp Cell Res. 1974 Feb;83(2):351-61.

Customs & Trade Information

HS Code	2922199090
Summary	2922199090. other amino-alcohols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid?

The CAS number of N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid is 7365-44-8.

What are the molecular formula and molecular weight of N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid?

N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid has molecular formula C6H15NO6S and molecular weight 229.25 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid (CAS 7365-44-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1054096-5 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.