TES (buffer)
title: "TES (buffer)" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["buffer-solutions", "sulfonic-acids", "primary-alcohols", "triols", "secondary-amines"] topic_path: "general/buffer-solutions" source: "https://en.wikipedia.org/wiki/TES_(buffer)" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 450878947 | ImageFile = TES free acid.svg | ImageSize = | ImageAlt = | Name = TES | PIN = 2-{[1,3-Dihydroxy-2-(hydroxymethyl)propan-2-yl]amino}ethane-1-sulfonic acid | OtherNames = TES free acid |Section1={{Chembox Identifiers | CASNo_Ref = | CASNo = 7365-44-8 | CASNo2 = 70331-82-7 | CASNo2_Comment = (sodium salt) | UNII_Ref = | UNII = L173DK6289 | PubChem = 6992013 | ChemSpiderID_Ref = | ChemSpiderID = 73842 | SMILES = C(CS(=O)(=O)O)NC(CO)(CO)CO | InChI = 1/C6H15NO6S/c8-3-6(4-9,5-10)7-1-2-14(11,12)13/h7-10H,1-5H2,(H,11,12,13) | InChIKey = JOCBASBOOFNAJA-UHFFFAOYAR | StdInChI_Ref = | StdInChI = 1S/C6H15NO6S/c8-3-6(4-9,5-10)7-1-2-14(11,12)13/h7-10H,1-5H2,(H,11,12,13) | StdInChIKey_Ref = | StdInChIKey = JOCBASBOOFNAJA-UHFFFAOYSA-N}} |Section2={{Chembox Properties | Formula = C6H15NO6S | MolarMass = 229.25 g/mol | Appearance = | Density = | MeltingPt = | BoilingPt = | Solubility = }} |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = }} TES is used to make buffer solutions. It has a pKa value of 7.550 (I=0, 25°C). It is one of the Good's buffers and can be used to make buffer solutions in the pH range 6.8–8.2. It is one of the components of Test yolk buffer medium used for refrigeration and transport of semen.
References
References
- Goldberg, R.. (2002). "Thermodynamic Quantities for the Ionization Reactions of Buffers". J. Phys. Chem. Ref. Data.
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