Six astronauts are still on the space station as part of a planned year-long stay in space, the longest tour of duty in the station's 15-year history.
The molecular formula of citric acid is C 6 H 8 O 7. The chemical formula for citric acid is best shown by a diagram of its complete structural formula. This shows how the atoms are arranged in the molecule. Citric acid has three carboxyl or-COOH groups and is triprotic in nature.
Citric acid trisodi um salt dihydrate. HOC(COONa)(CH2COONa)2 Â· 2H2O [Beilstein] [Formula] [MDL number]. MFCD00150031 [MDL number]. Natrium-2-hydroxy-1 ,2,3-propantricarbo xylathydrat (3:1:2) [German] [ACD/IUPAC Name].,2,3-Propanetricar boxylic acid, 2-hyd roxy-, sodium salt, dihydrate. 2-Hydroxy-1,2,3-pro panetricarboxylic a cid trisodium salt dihydrate. Citronensaeure,Trin atrium-Salz-Dihydrat. sodium 2-hydroxy-1, 2,3-propanetricarbo xylate hydrate(3:1: 2).