- Synonyms: 2-Amino-2-(hydroxymethyl)-1,3-propanediol, Tromethamine, THAM, TRIS buffer - C4H11NO3 - M = 121,14 g/mol - CAS [77-86-1] - EINECS-No.: 201-064-4 - Solub. in water: (20 ºC): 800 g/l - Melting point: 172 - 173 ºC - Boiling point: (13,3 hPa) 219 - 220 ºC - LD 50 (oral, rat): 5900 mg/kg - GHS-signal word: Warning - GHS-H sentences: H315 - H319 - GHS-P sentences: P280 - P264 - P305+P351+P338 - P321 - P332+P313 - P337+P313 - Tariff number: 2922 19 00 - Applications: analytical chemistry, in buffer solutions, in biochemistry, laboratory reagent, in the pharmaceutics industry, emulsifier (cosmetics), for the synthesis of: tensoactives. SPECIFICATIONS assay (on dried sample): 99,8 - 100,1 % absorbance: passes test insoluble in water: max. 0,005 % uncertainty : 0,05% heavy metals (as Pb): max. 0,0005 % iron (Fe): max. 0,0005 % water (K.F.): max. 2 % This standard solution is traceable to Standard Reference Material from NIST.