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Molecular Weight of L-alanine (C3H7NO2)

Identification of L-alanine Chemical Compound

2D chemical structure image of L-alanine
Chemical Formula C3H7NO2
Molecular Weight 89.09318 g/mol
IUPAC Name (2S)-2-aminopropanoic acid
SMILES String CC(N)C(O)=O
InChI InChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m0/s1
InChIKey QNAYBMKLOCPYGJ-REOHCLBHSA-N

Molecular Weight Description

The L-alanine molecule consists of 7 Hydrogen atom(s), 3 Carbon atom(s), 1 Nitrogen atom(s), and 2 Oxygen atom(s) - a total of 13 atom(s). The molecular weight of L-alanine is determined by the sum of the atomic weights of each constituent element multiplied by the number of atoms, which is calculated to be:

$$ 89.09318 · \frac{g}{mol} $$

The exact term of the above molecular weight is “molar mass”, which is based on the atomic mass of each element. Molecular weight is actually an older term of “relative molar mass” or “molecular mass”, which is a dimensionless quantity equal to the molar mass divided by the molar mass constant defined by 1 g/mol.

Molecular masses are calculated from the standard atomic weights of each nuclide, while molar masses are calculated from the atomic mass of each element. The atomic mass takes into account the isotopic distribution of the element in a given sample.

3D chemical structure image of L-alanine
Ball-and-stick model of L-alanine

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Additional Information for Identifying L-alanine Molecule


  • InChI (IUPAC International Chemical Identifier) information of L-alanine

    In addition to the molecular weight information, the structural information of L-alanine in a textual expression is available via InChi. The full standard InChI of L-alanine is given below:

    InChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m0/s1

    It can provide a way to encode the molecular information of L-alanine to facilitate the search for the compound information in databases and on the web.

    The condensed, 27 character standard InChIKey (hashed version of the full standard InChI) of L-alanine is:

    InChIKey=QNAYBMKLOCPYGJ-REOHCLBHSA-N

    It may allow easier web searches for L-alanine. The InChIKey, however, needs to be linked to the full InChI as well in order to get back to the original structure of the L-alanine as the full standard InChI cannot be reconstructed from the InChIKey.

  • Other names (synonyms) or registry numbers of L-alanine

    There may be different names of the L-alanine compound depending on the various situations of industrial applications, which are given below including the registry numbers if available:

    • T7107093
    • EN300-52621
    • BBV-38372414
    • ZX-AFC000752
    • L-Alanine (JP16)
    • L-Alanine, from non-animal source, meets EP, USP testing specifications, suitable for cell culture, >=98.5%
    • L-Alanine, Ajinomoto, EP, JP, USP, manufactured under appropriate GMP controls for Pharma or Biopharmaceutical production, suitable for cell culture
    • 77160-91-9
    • L-Alanine, pharmaceutical secondary standard; traceable to USP and PhEur
    • L-Alanine, United States Pharmacopeia (USP) Reference Standard
    • Z940713326
    • F0001-2354
    • Alanine, European Pharmacopoeia (EP) Reference Standard
    • 3B1-008007
    • L-Alanine, certified reference material, TraceCERT(R)
    • (S)-2-Aminopropionic acid; L-|A-Aminopropionic acid
    • SR-01000597687-3
    • Q-201274
    • J-015860
    • A803529
    • M-5982
    • PROPOXY, 2-AMINO-1-OXO-, (2S)-
    • ETHYL, 2-AMINO-2-CARBOXY-, (S)-
    • L-Alanine, SAJ special grade, >=99.0%
    • L-Alanine, BioUltra, >=99.5% (NT)
    • 26336-61-8
    • L-Alanine, purum, >=98.0% (NT)
    • RTC-066531
    • L-(-)-2-AMINOPROPANOIC ACID
    • BDBM50000099
    • ANW-32509
    • L-Alanine, >=99.0% (NT)
    • L-Alanine, 99%, natural, FG
    • L-Alanine, >=98% (TLC)
    • L-Alanine, Cell Culture Reagent
    • L-ALANINE DEXTRO-ROTATORY
    • HMDB00161
    • GTPL4543
    • GTPL4542
    • (2S)-2-azanylpropanoic acid
    • (S)-2-amino-Propanoic acid
    • GTPL720
    • OF5P57N2ZX
    • L-CH3CH(NH2)COOH
    • bmse000994
    • L-Alanine, >=99%
    • H-L-ALA-OH
    • L-|A-Aminopropionic acid
    • (S)-2-amino-Propanoate
    • L-ALA-OH
    • alpha-Aminopropanoic acid
    • nchembio.145-comp31
    • (S)-2-Aminopropanoate
    • L-Alanine (JP17)
    • ALA-OH
    • 2-Ammoniopropanoic acid
    • L-alpha-Aminopropionate
    • nchembio.255-comp3
    • nchembio.237-comp9
    • [14C]-alanine
    • nchem.554-comp3
    • L-Alanine (JAN)
    • nchembio816-comp4
    • L-2-Aminopropionate
    • L-2-Aminopropanoate
    • AR-1J2938
    • alpha-Aminopropionate
    • alpha-Aminopropanoate
    • [3H]-alanine
    • [14C]alanine
    • L-Ala
    • L-a-Aminopropionate
    • [3H]alanine
    • a-Aminopropionate
    • alanine,
    • Ritalanine
    • L-.alpha.-Aminopropionic acid
    • .alpha.-Aminopropionic acid
    • L-ALANINE U.S.P.
    • Propanoic acid, 2-amino-
    • 2-Ammoniopropanoate
    • 2-Aminopropionate
    • 787635-21-6
    • 759445-89-1
    • 170805-71-7
    • L-.alpha.-Alanine
    • F4F207FF-8FF8-4789-99A1-147AE0A36673
    • .alpha.-Alanine
    • I04-1136
    • 6898-94-8
    • 25191-17-7
    • 18875-37-1
    • 130380-93-7
    • 115967-49-2
    • D00012
    • A0179
    • LPG
    • MFCD00064410
    • Propanoic acid, 2-amino-, (S)
    • L-Alanine, labeled with tritium
    • Alanine, L- (7CI,8CI)
    • bmse000028
    • L-Alanine, labeled with carbon-14
    • Tocris-0205
    • L-Alanine, N-coco alkyl derivs.
    • L-Alanine, homopolymer
    • (S)-()-Alanine
    • L-Alanine (9CI)
    • AmbotzHAA1066
    • Alanine (USP)
    • L-&alpha-alanine
    • (C14)L-Alanine
    • a-Aminopropionic acid
    • 14C-L-Alanine
    • (S)-2-Aminopropionic acid
    • L-a-Alanine
    • L-Alanin
    • Poly-DL-alanine
    • L-a-Aminopropionic acid
    • Propanoic acid, 2-amino-, (S)-
    • Alanine [USAN:INN]
    • ALA
    • a-Alanine
    • Alaninum
    • polyalanine
    • alanina
    • Alanina [DCIT,Spanish]
    • (S)-alpha-Aminopropionsaeure
    • Poly-L-alanine
    • (S)-2-Aminopropionsaeure
    • ALANINE, L-
    • alpha-Alanine
    • Alanine (VAN)
    • (L)-Alanine
    • L-S-Aminopropionic acid
    • (S)-(+)-Alanine
    • Alaninum [Latin]
    • 2-Aminopropanoic acid, L-
    • L-2-Aminopropionsaeure
    • alpha-Aminopropionic acid
    • L-alpha-Aminopropionic acid
    • 2-Aminopropionic acid
    • L-2-Aminopropanoic acid
    • H-Ala-OH
    • L-(+)-Alanine
    • L-2-Aminopropionic acid
    • L-alpha-alanine
    • alanine
    • (S)-2-Aminopropanoic acid
    • (S)-Alanine
    • 56-41-7
    • L-alanine

L-alanine Identification Summary Frequently Asked Questions (FAQs)

What’s the formula of L-alanine?
C3H7NO2
How many atoms and what are the elements in the L-alanine molecule?
13 atom(s) - 7 Hydrogen atom(s), 3 Carbon atom(s), 1 Nitrogen atom(s), and 2 Oxygen atom(s)
How many chemical bonds and what types of bonds are in the L-alanine structure?
12 bond(s) - 5 non-H bond(s), 1 multiple bond(s), 1 rotatable bond(s), 1 double bond(s), 1 carboxylic acid(s) (aliphatic), 1 primary amine(s) (aliphatic), and 1 hydroxyl group(s)
What’s the molar mass of L-alanine?
89.09318 g/mol
What’s the SMILES format of L-alanine?
CC(N)C(O)=O
What’s the InChI format of L-alanine?
InChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m0/s1
What’s the InChIKey string of L-alanine?
QNAYBMKLOCPYGJ-REOHCLBHSA-N

3117 The contents of this page can freely be shared if cited as follows:
Source: Chemical Compounds Deep Data Source (CCDDS; https://www.molinstincts.com) based on 41 patented QSQN and QN technology
commercialized into Mol-Instincts database and ChemRTP, ChemEssen, Inc (2024).

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