M1000

L-(−)-Malic acid

≥95% (titration)

• Synonym(s): (S)-(−)-2-Hydroxysuccinic acid, L-Hydroxybutanedioic acid
• Linear Formula: HO₂CCH₂CH(OH)CO₂H
• CAS Number: 97-67-6
• Molecular Weight: 134.09
• Beilstein/REAXYS Number: 1723541
• EC Number: 202-601-5
• MDL number: MFCD00064213
• UNSPSC Code: 12352106
• PubChem Substance ID: 24896463
• NACRES: NA.22

Properties

• Quality Level: 300
• assay: ≥95% (titration)
• form: powder
• pKa (25 °C): (1) 3.46, (2) 5.10
• mp: 101-103 °C ((lit.)); 101-103 °C (lit.)
• solubility: water: 100 mg/mL, clear to very slightly hazy, colorless
• density: 1,595 g/cm³ at 68 °F
• SMILES string: O[C@@H](CC(O)=O)C(O)=O; O[C@@H](CC(O)=O)C(O)=O
• InChI: 1S/C4H6O5/c5-2(4(8)9)1-3(6)7/h2,5H,1H2,(H,6,7)(H,8,9)/t2-/m0/s1; 1S/C4H6O5/c5-2(4(8)9)1-3(6)7/h2,5H,1H2,(H,6,7)(H,8,9)/t2-/m0/s1
• InChI key: BJEPYKJPYRNKOW-REOHCLBHSA-N; BJEPYKJPYRNKOW-REOHCLBHSA-N

Description

General description

L-Malic acid is the naturally occurring isomer of malic acid, found mainly in sour and unripe fruits.

Application

L-(-)-Malic acid may be used to prepare:

• diethyl (S)-malate
• ethyl (R)-2-hydroxyl-4-phenylbutanoate
• ethyl (S)-2-hydroxyl-4-phenylbutanoate
• D-homophenylalanine ethyl ester hydrochloride
• furo[3,2-i]indolizines

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315,H319
• pcodes: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves