Bis-tris methane

Bis-tris methane
Names
	Preferred IUPAC name 2-[Bis(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol
	Other names Bis-(2-hydroxy-ethyl)-amino-tris(hydroxymethyl)-methane; 2-[Bis(2-hydroxyethyl)amino]-2-(hydroxymethyl)-1,3-propanediol; 2,2-Bis(hydroxymethyl)-2,2,2-nitrilotriethanol;
Identifiers
CAS Number	6976-37-0 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	2205275
ChEBI	CHEBI:41250 ;
ChemSpider	73505 ;
ECHA InfoCard	100.027.489
EC Number	230-237-7;
Gmelin Reference	4519
MeSH	Bistris
PubChem CID	81462;
UNII	Q1XC3631CP ;
CompTox Dashboard (EPA)	DTXSID6064537 ;
	InChI InChI=1S/C8H19NO5/c10-3-1-9(2-4-11)8(5-12,6-13)7-14/h10-14H,1-7H2 Key: OWMVSZAMULFTJU-UHFFFAOYSA-N ;
	SMILES OCCN(CCO)C(CO)(CO)CO;
Properties
Chemical formula	C8H19NO5
Molar mass	209.242 g·mol−1
Appearance	White crystals
Odor	Odourless
Melting point	102 to 103 °C (216 to 217 °F; 375 to 376 K)
Solubility in water	209.2 g L−1 (at 20 °C)
Acidity (pKa)	6.46
Basicity (pKb)	7.54
UV-vis (λmax)	280 nm
Absorbance	0.15
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P305+P351+P338
NFPA 704 (fire diamond)	2 0 0
Related compounds
Related alkanols	N-Methylethanolamine; Dimethylethanolamine; Diethylethanolamine; Diethanolamine; N,N-Diisopropylaminoethanol; Methyl diethanolamine; Triethanolamine; Meglumine;
Related compounds	Diethylhydroxylamine
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Bis-tris methane, also known as BIS-TRIS or BTM, is a buffering agent used in biochemistry. Bis-tris methane is an organic tertiary amine with labile protons having a pKa of 6.46 at 25 °C. It is an effective buffer between the pH 5.8 and 7.2. Bis-tris methane binds strongly to Cu and Pb ions as well as, weakly, to Mg, Ca, Mn, Co, Ni, Zn and Cd.