| Description & Product No. | Characteristics | Three- and One-letter Code | Formula & MW [g/mol] | Solubility g/L H2O (25°C) | Isoelectric point (pI) | Acid dissoziation constant (25°C) |
| L-Alanine | non-polar amino acid | Ala, A | C3H7NO2 | 165 | 6 | pK1= 2,35 |
| A1688 (Ph. Eur.; USP) | MW = 89,09 | 218 (50°C) | pK2= 9,87 | |||
| L-Alanyl-L-glutamine | "stable glutamine" for cell culture applications; improved solubility | Ala-Gln | C8H15N3O4 | 568 (20°C) | ||
| A3198 (Cell culture) | MW = 217,23 | |||||
| 5-Aminolevulinic acid hydrochloride | first compound in the porphyrin synthesis pathway | C5H9NO3 • HCl | 100 | |||
| A1731 (BioChemica) | MW = 167,61 | |||||
| L-Arginin base | basic amino acid; positively charged at neutral pH; polar |
Arg, R | C6H14N4O2 | 150 | 10,76 | pK1= 2,18 |
| A3675 (BioChemica) | MW = 174,20 | pK2= 9,09 | ||||
| A3653 (Cell culture) | ||||||
| A1345 (Ph. Eur.; USP) | ||||||
| L-Arginine hydrochloride | Arg, R | C6H14N4O2 • HCl | 900 | |||
| A3709 (BioChemica) | MW = 210,66 | |||||
| A1700 (Ph. Eur.; USP) | ||||||
| L-Asparagine monohydrate | polar amino acid | Asn, N | C4H8N2O3 • H2O | 22-30 | pK1= 2,02 | |
| A3721 (BioChemica) | MW = 150,14 | pK2= 8,80 | ||||
| A1668 (Ph. Eur.; USP) | ||||||
| L-Aspartic acid | acidic amino acid; negatively charged at neutral pH | Asp, D | C4H7NO4 | 4-5 (20°C) | 2,77 | pK1= 1,88 |
| A1701 (Ph. Eur.; USP) | MW = 133,10 | pK3= 9,60 (NH2) | ||||
| L-Cysteine | polar amino acid; contains a sufhydryl group | Cys, C | C3H7NO2S | 280 | 5,05 | pK1= 1,91 |
| A3694 (BioChemica) | MW = 121,16 | pK2= 10,28 | ||||
| A1425 (Ph. Eur.; USP) | pK3= 8,14 (SH) | |||||
| L-Cysteine hydrochloride monohydrate | Cys, C | C3H7NO2S • HCl • H2O | 650 | |||
| A3698 (BioChemica) | MW = 175,64 | |||||
| A1702 (Ph. Eur.; USP) | ||||||
| L-Cystine | dimeric amino acid formed by the oxidation of two cysteine residues (forming a disulfide bond) | C6H12N2O4S2 | 0,1 | 4,8 | pK1= 1,04 | |
| A1703 (Ph. Eur.; USP) | ||||||
| L-Glutamine | polar amino acid | Gln, Q | C5H10N2O3 | 26 (18°C) | 5,65 | pK1= 2,17 |
| A3734 (BioChemica) | MW = 146,15 | 45 (25°C) | pK2= 9,13 | |||
| A3704 (Cell culture) | 100 (40°C) | |||||
| A1420 (DAB; USP) | ||||||
| L-Glutamic acid | acidic amino acid; negatively charged at neutral pH; polar | Glu, E | C5H9NO4 | 11 | 3,22 | pK1= 2,19 |
| A3712 (BioChemica) | MW = 147,13 | pK2= 4,25 | ||||
| A1704 (Ph. Eur.; USP) | ||||||
| Glycine | polar and hydrophilic amino acid | Gly, G | C2H5NO2 | 225 | 5,97 | pK1= 2,35 |
| A4554 (Ph. Eur.; USP) | MW=75,07 | pK2=9,78 | ||||
| L-Histidine base | basic amino acid; positively charged at neutral pH; essential | His, H | C6H9N3O2 | 42 | 7,59 | pK1= 1,78 |
| A3738 (BioChemica) | MW = 155,16 | pK2= 5,97 | ||||
| A1341 (Ph. Eur.; USP) | ||||||
| L-Histidine hydrochloride monohydrate | His, H | C6H9N3O2 • HCl • H2O | 170-400 | |||
| A3733 BioChemica) | MW = 209,63 | |||||
| A1591 (Ph. Eur.; USP) | ||||||
| L-Hydroxyproline | non-proteinogenic α-amino acid; major component of collagen and essential for its stability | Hyp | C5H9NO3 | 361 | 5,83 | pK1= 1,82 |
| A3742 (Cell culture) | MW = 131,13 | pK2= 9,65 | ||||
| A1705 (pure) | ||||||
| L-Isoleucine | non-polar hydrophobic amino acid; aliphatic; essential | Ile, I | C6H13NO2 | 32 (20°C) | 5,98 | pK1= 2,32 |
| A3642 (Cell culture) | MW=131,17 | pK2=9,76 | ||||
| A1440 (Ph. Eur.; USP) | ||||||
| L-Leucine | non-polar hydrophobic amino acid; aliphatic; essential | Leu, L | C6H13NO2 | 24 (20°C) | 6,02 | pK1= 2,36 |
| A1426 (Ph. Eur.; USP) | MW = 131,17 | pK2= 9,60 | ||||
| L-Lysine monohydrate | basic amino acid; positively charged at neutral pH; hydrophilic; essential | Lys, K | C6H14N2O2 • H2O | 300 | 9,74 | pK1= 2,20 |
| A1342 (DAB) | MW=164,21 | pK2=8,90 | ||||
| L-Lysine hydrochloride | Lys, K | C6H14N2O2 • HCl | 420 | |||
| A1706 (Ph. Eur.; USP) | MW = 182,65 | |||||
| L-Methionine | non-polar hydrophobic amino acid; essential | Met, M | C5H11NO2S | 48 (20°C) | 5,74 | pK1= 2,28 |
| A1340 (Ph. Eur.; USP) | MW = 149,21 | pK2= 9,21 | ||||
| L-Ornithine hydrochloride | non-proteinogenic α-amino acid; plays a role in the urea cycle | C5H12N2O2 • HCl | 100 | pK1= 1,94 | ||
| A3450 (BioChemica) | MW = 168,62 | pK2= 8,65 | ||||
| A1343 (DAB) | ||||||
| L-Phenylalanine | non-polar aromatic amino acid; hydrophobic; essential | Phe, F | C9H11NO2 | 27 | 5,48 | pK1= 2,20 |
| A1344 (Ph. Eur.; USP) | MW = 165,19 | pK2= 9,31 | ||||
| L-Proline | non-polar heterocyclic amino acid; highly water soluble | Pro, P | C5H9NO2 | 1500 | 6,3 | pK1= 1,99 |
| A3453 (BioChemica) | MW = 115,13 | pK2= 10,60 | ||||
| A3926 (Cell culture) | ||||||
| A1707 (Ph. Eur.; USP) | ||||||
| L-Serine | polar and hydrophilic amino acid | Ser, S | C3H7NO3 | 364 (20°C) | 5,68 | pK1= 2,21 |
| A1708 (Ph. Eur.; USP) | MW = 105,09 | pK2= 9,15 | ||||
| L-Threonine | polar amino acid; essential | Thr, T | C4H9NO3 | 90 | 5,6 | pK1= 2,15 |
| A1419 (Ph. Eur.; USP) | MW = 119,12 | pK2= 9,12 | ||||
| L-Tryptophan | non-polare aromatic amino acid; hydrophobic; essential | Trp, W | C11H12N2O2 | 11 | 5,89 | pK1= 2,38 |
| A3445 (BioChemica) | MW = 204,23 | pK2= 9,39 | ||||
| A1645 (Ph. Eur.; USP) | ||||||
| L-Tyrosine | non-polare aromatic amino acid; hydrophobic | Tyr, Y | C9H11NO3 | 0,4 | 5,66 | pK1= 2,20 |
| A3401 (Cell culture) | MW = 181,19 | pK2= 9,11 | ||||
| A1677 (Ph. Eur.; USP) | ||||||
| L-Valine | non-polare aliphatic amino acid; hydrophobic; essential | Val, V | C5H11NO2 | 85 | 5,96 | pK1= 2,29 |
| A3406 (Cell culture) | MW = 117,15 | pK2= 9,74 | ||||
| A1637 (Ph. Eur.; USP) |
Abbreviation
MW = Molecular weight