Malic acid
COEI-1-ACIMAL L-Malic acid , DL-Malic acid
2-hydroxybutanedioic acid
N° SIN: 296
C.A.S. number 617-48-1
Chemical formula C4H6O5
Molecular mass: 134.09
Lactic acid
COEI-1-ACILAC L-Lactic acid, D-Lactic acid, D,L-Lactic acid2-hydroxypropanoic acid
N° SIN : 270
C.A.S. number 50-21-5
(L-: 79-33-4; D-: 10326-41-7; DL-: 598-82-3)
chemical formula C3H6O3
Molecular mass
Density and Specific Gravity at 20°C (Type-I-and-IV)
OIV-MA-AS2-01 Density and specific gravity at 20°C
Type I and IV methods
- Scope of application
This resolution is applicable for determining the density and specific gravity at 20 °C of wines and musts, using any of the following:
Determination of the distribution of deuterium in acetic extracted from wine vinegar using nuclear magnetic resonance (NMR) (Type IV)
OIV-MA-VI-24 Determination of the distribution of deuterium in acetic acid extracted from wine vinegar using nuclear magnetic resonance (NMR)
Type IV method
Method for 18O/16O isotope ratio determination of water in wine vinegar using isotopic mass spectrometry (Type II)
OIV-MA-VI-23 Method for 18O/16O isotope ratio determination of water in wine vinegar using isotopic mass spectrometry
Type II method
Method for 13C/12C isotope ratio determination of acetic acid in wine vinegar by isotopic mass spectrometry (Type II)
OIV-MA-VI-22 Method for of 
Detection of synthetic acetic acid in wine vinegars by the determination of beta radioactivity of 14c of acetic acid by liquid scintillation (Type IV)
OIV-MA-VI-21 Detection of synthetic acetic acid in wine vinegars by measuring the β emissions of 
Authentification via FINE-NMR and other isotopic methods (Type IV)
OIV-MA-VI-20 Authentification via fine- NMR® and other isotopic methods
Type IV method
- Objective and principle
The main objective for this procedure is to detect and measure synthetic acetic acid in vinegars and also detect any other downgrading of vinegars.